[PATCH AUTOSEL 4.14 01/39] Bluetooth: sco: Fix lock_sock() blockage by memcpy_from_msg()
From: Takashi Iwai tiwai@suse.de
[ Upstream commit 99c23da0eed4fd20cae8243f2b51e10e66aa0951 ]
The sco_send_frame() also takes lock_sock() during memcpy_from_msg() call that may be endlessly blocked by a task with userfaultd technique, and this will result in a hung task watchdog trigger.
Just like the similar fix for hci_sock_sendmsg() in commit 92c685dc5de0 ("Bluetooth: reorganize functions..."), this patch moves the memcpy_from_msg() out of lock_sock() for addressing the hang.
This should be the last piece for fixing CVE-2021-3640 after a few already queued fixes.
Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/sco.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index f681e7ce89457..a5cc8942fc3f8 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -255,7 +255,8 @@ static int sco_connect(struct hci_dev *hdev, struct sock *sk) return err; }
-static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) +static int sco_send_frame(struct sock *sk, void *buf, int len, + unsigned int msg_flags) { struct sco_conn *conn = sco_pi(sk)->conn; struct sk_buff *skb; @@ -267,15 +268,11 @@ static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
BT_DBG("sk %p len %d", sk, len);
- skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); + skb = bt_skb_send_alloc(sk, len, msg_flags & MSG_DONTWAIT, &err); if (!skb) return err;
- if (memcpy_from_msg(skb_put(skb, len), msg, len)) { - kfree_skb(skb); - return -EFAULT; - } - + memcpy(skb_put(skb, len), buf, len); hci_send_sco(conn->hcon, skb);
return len; @@ -692,6 +689,7 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) { struct sock *sk = sock->sk; + void *buf; int err;
BT_DBG("sock %p, sk %p", sock, sk); @@ -703,14 +701,24 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg, if (msg->msg_flags & MSG_OOB) return -EOPNOTSUPP;
+ buf = kmalloc(len, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + if (memcpy_from_msg(buf, msg, len)) { + kfree(buf); + return -EFAULT; + } + lock_sock(sk);
if (sk->sk_state == BT_CONNECTED) - err = sco_send_frame(sk, msg, len); + err = sco_send_frame(sk, buf, len, msg->msg_flags); else err = -ENOTCONN;
release_sock(sk); + kfree(buf); return err; }
From: Wang ShaoBo bobo.shaobowang@huawei.com
[ Upstream commit 1bff51ea59a9afb67d2dd78518ab0582a54a472c ]
use-after-free error in lock_sock_nested is reported:
[ 179.140137][ T3731] ===================================================== [ 179.142675][ T3731] BUG: KMSAN: use-after-free in lock_sock_nested+0x280/0x2c0 [ 179.145494][ T3731] CPU: 4 PID: 3731 Comm: kworker/4:2 Not tainted 5.12.0-rc6+ #54 [ 179.148432][ T3731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 [ 179.151806][ T3731] Workqueue: events l2cap_chan_timeout [ 179.152730][ T3731] Call Trace: [ 179.153301][ T3731] dump_stack+0x24c/0x2e0 [ 179.154063][ T3731] kmsan_report+0xfb/0x1e0 [ 179.154855][ T3731] __msan_warning+0x5c/0xa0 [ 179.155579][ T3731] lock_sock_nested+0x280/0x2c0 [ 179.156436][ T3731] ? kmsan_get_metadata+0x116/0x180 [ 179.157257][ T3731] l2cap_sock_teardown_cb+0xb8/0x890 [ 179.158154][ T3731] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 179.159141][ T3731] ? kmsan_get_metadata+0x116/0x180 [ 179.159994][ T3731] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 179.160959][ T3731] ? l2cap_sock_recv_cb+0x420/0x420 [ 179.161834][ T3731] l2cap_chan_del+0x3e1/0x1d50 [ 179.162608][ T3731] ? kmsan_get_metadata+0x116/0x180 [ 179.163435][ T3731] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 179.164406][ T3731] l2cap_chan_close+0xeea/0x1050 [ 179.165189][ T3731] ? kmsan_internal_unpoison_shadow+0x42/0x70 [ 179.166180][ T3731] l2cap_chan_timeout+0x1da/0x590 [ 179.167066][ T3731] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 179.168023][ T3731] ? l2cap_chan_create+0x560/0x560 [ 179.168818][ T3731] process_one_work+0x121d/0x1ff0 [ 179.169598][ T3731] worker_thread+0x121b/0x2370 [ 179.170346][ T3731] kthread+0x4ef/0x610 [ 179.171010][ T3731] ? process_one_work+0x1ff0/0x1ff0 [ 179.171828][ T3731] ? kthread_blkcg+0x110/0x110 [ 179.172587][ T3731] ret_from_fork+0x1f/0x30 [ 179.173348][ T3731] [ 179.173752][ T3731] Uninit was created at: [ 179.174409][ T3731] kmsan_internal_poison_shadow+0x5c/0xf0 [ 179.175373][ T3731] kmsan_slab_free+0x76/0xc0 [ 179.176060][ T3731] kfree+0x3a5/0x1180 [ 179.176664][ T3731] __sk_destruct+0x8af/0xb80 [ 179.177375][ T3731] __sk_free+0x812/0x8c0 [ 179.178032][ T3731] sk_free+0x97/0x130 [ 179.178686][ T3731] l2cap_sock_release+0x3d5/0x4d0 [ 179.179457][ T3731] sock_close+0x150/0x450 [ 179.180117][ T3731] __fput+0x6bd/0xf00 [ 179.180787][ T3731] ____fput+0x37/0x40 [ 179.181481][ T3731] task_work_run+0x140/0x280 [ 179.182219][ T3731] do_exit+0xe51/0x3e60 [ 179.182930][ T3731] do_group_exit+0x20e/0x450 [ 179.183656][ T3731] get_signal+0x2dfb/0x38f0 [ 179.184344][ T3731] arch_do_signal_or_restart+0xaa/0xe10 [ 179.185266][ T3731] exit_to_user_mode_prepare+0x2d2/0x560 [ 179.186136][ T3731] syscall_exit_to_user_mode+0x35/0x60 [ 179.186984][ T3731] do_syscall_64+0xc5/0x140 [ 179.187681][ T3731] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 179.188604][ T3731] =====================================================
In our case, there are two Thread A and B:
Context: Thread A: Context: Thread B:
l2cap_chan_timeout() __se_sys_shutdown() l2cap_chan_close() l2cap_sock_shutdown() l2cap_chan_del() l2cap_chan_close() l2cap_sock_teardown_cb() l2cap_sock_teardown_cb()
Once l2cap_sock_teardown_cb() excuted, this sock will be marked as SOCK_ZAPPED, and can be treated as killable in l2cap_sock_kill() if sock_orphan() has excuted, at this time we close sock through sock_close() which end to call l2cap_sock_kill() like Thread C:
Context: Thread C:
sock_close() l2cap_sock_release() sock_orphan() l2cap_sock_kill() #free sock if refcnt is 1
If C completed, Once A or B reaches l2cap_sock_teardown_cb() again, use-after-free happened.
We should set chan->data to NULL if sock is destructed, for telling teardown operation is not allowed in l2cap_sock_teardown_cb(), and also we should avoid killing an already killed socket in l2cap_sock_close_cb().
Signed-off-by: Wang ShaoBo bobo.shaobowang@huawei.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/l2cap_sock.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 3905af1d300f7..13d070e7738db 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -1329,6 +1329,9 @@ static void l2cap_sock_close_cb(struct l2cap_chan *chan) { struct sock *sk = chan->data;
+ if (!sk) + return; + l2cap_sock_kill(sk); }
@@ -1337,6 +1340,9 @@ static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err) struct sock *sk = chan->data; struct sock *parent;
+ if (!sk) + return; + BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
/* This callback can be called both for server (BT_LISTEN) @@ -1520,8 +1526,10 @@ static void l2cap_sock_destruct(struct sock *sk) { BT_DBG("sk %p", sk);
- if (l2cap_pi(sk)->chan) + if (l2cap_pi(sk)->chan) { + l2cap_pi(sk)->chan->data = NULL; l2cap_chan_put(l2cap_pi(sk)->chan); + }
if (l2cap_pi(sk)->rx_busy_skb) { kfree_skb(l2cap_pi(sk)->rx_busy_skb);
From: Barnabás Pőcze pobrn@protonmail.com
[ Upstream commit 1975718c488a39128f1f515b23ae61a5a214cc3d ]
Previously, `__query_block()` would fail if the second WCxx method call failed. However, the WQxx method might have succeeded, and potentially allocated memory for the result. Instead of throwing away the result and potentially leaking memory, ignore the result of the second WCxx call.
Signed-off-by: Barnabás Pőcze pobrn@protonmail.com Link: https://lore.kernel.org/r/20210904175450.156801-25-pobrn@protonmail.com Reviewed-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/wmi.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index a56e997816b23..07c1e0829b19a 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -307,7 +307,14 @@ static acpi_status __query_block(struct wmi_block *wblock, u8 instance, * the WQxx method failed - we should disable collection anyway. */ if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) { - status = acpi_execute_simple_method(handle, wc_method, 0); + /* + * Ignore whether this WCxx call succeeds or not since + * the previously executed WQxx method call might have + * succeeded, and returning the failing status code + * of this call would throw away the result of the WQxx + * call, potentially leaking memory. + */ + acpi_execute_simple_method(handle, wc_method, 0); }
return status;
From: Aleksander Jan Bajkowski olek2@wp.pl
[ Upstream commit c12aa581f6d5e80c3c3675ab26a52c2b3b62f76e ]
Reading the DMA registers immediately after the reset causes Data Bus Error. Adding a small delay fixes this issue.
Signed-off-by: Aleksander Jan Bajkowski olek2@wp.pl Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/lantiq/xway/dma.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c index 805b3a6ab2d60..ce7e033b4bb18 100644 --- a/arch/mips/lantiq/xway/dma.c +++ b/arch/mips/lantiq/xway/dma.c @@ -22,6 +22,7 @@ #include <linux/export.h> #include <linux/spinlock.h> #include <linux/clk.h> +#include <linux/delay.h> #include <linux/err.h>
#include <lantiq_soc.h> @@ -234,6 +235,8 @@ ltq_dma_init(struct platform_device *pdev) clk_enable(clk); ltq_dma_w32_mask(0, DMA_RESET, LTQ_DMA_CTRL);
+ usleep_range(1, 10); + /* disable all interrupts */ ltq_dma_w32(0, LTQ_DMA_IRNEN);
From: Aleksander Jan Bajkowski olek2@wp.pl
[ Upstream commit 5ca9ce2ba4d5884cd94d1a856c675ab1242cd242 ]
Different SoCs have a different number of channels, e.g .: * amazon-se has 10 channels, * danube+ar9 have 20 channels, * vr9 has 28 channels, * ar10 has 24 channels.
We can read the ID register and, depending on the reported number of channels, reset the appropriate number of channels.
Signed-off-by: Aleksander Jan Bajkowski olek2@wp.pl Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/lantiq/xway/dma.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c index ce7e033b4bb18..0de61165ef6e4 100644 --- a/arch/mips/lantiq/xway/dma.c +++ b/arch/mips/lantiq/xway/dma.c @@ -41,6 +41,7 @@ #define LTQ_DMA_PCTRL 0x44 #define LTQ_DMA_IRNEN 0xf4
+#define DMA_ID_CHNR GENMASK(26, 20) /* channel number */ #define DMA_DESCPT BIT(3) /* descriptor complete irq */ #define DMA_TX BIT(8) /* TX channel direction */ #define DMA_CHAN_ON BIT(0) /* channel on / off bit */ @@ -51,7 +52,6 @@ #define DMA_POLL BIT(31) /* turn on channel polling */ #define DMA_CLK_DIV4 BIT(6) /* polling clock divider */ #define DMA_2W_BURST BIT(1) /* 2 word burst length */ -#define DMA_MAX_CHANNEL 20 /* the soc has 20 channels */ #define DMA_ETOP_ENDIANNESS (0xf << 8) /* endianness swap etop channels */ #define DMA_WEIGHT (BIT(17) | BIT(16)) /* default channel wheight */
@@ -219,7 +219,7 @@ ltq_dma_init(struct platform_device *pdev) { struct clk *clk; struct resource *res; - unsigned id; + unsigned int id, nchannels; int i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -241,17 +241,18 @@ ltq_dma_init(struct platform_device *pdev) ltq_dma_w32(0, LTQ_DMA_IRNEN);
/* reset/configure each channel */ - for (i = 0; i < DMA_MAX_CHANNEL; i++) { + id = ltq_dma_r32(LTQ_DMA_ID); + nchannels = ((id & DMA_ID_CHNR) >> 20); + for (i = 0; i < nchannels; i++) { ltq_dma_w32(i, LTQ_DMA_CS); ltq_dma_w32(DMA_CHAN_RST, LTQ_DMA_CCTRL); ltq_dma_w32(DMA_POLL | DMA_CLK_DIV4, LTQ_DMA_CPOLL); ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL); }
- id = ltq_dma_r32(LTQ_DMA_ID); dev_info(&pdev->dev, "Init done - hw rev: %X, ports: %d, channels: %d\n", - id & 0x1f, (id >> 16) & 0xf, id >> 20); + id & 0x1f, (id >> 16) & 0xf, nchannels);
return 0; }
From: Peter Zijlstra peterz@infradead.org
[ Upstream commit ce0b9c805dd66d5e49fd53ec5415ae398f4c56e6 ]
vmlinux.o: warning: objtool: look_up_lock_class()+0xc7: call to rcu_read_lock_any_held() leaves .noinstr.text section
Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lore.kernel.org/r/20210624095148.311980536@infradead.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/locking/lockdep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 03e3ab61a2edd..ac0725b1ada75 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -713,7 +713,7 @@ look_up_lock_class(struct lockdep_map *lock, unsigned int subclass) if (DEBUG_LOCKS_WARN_ON(!irqs_disabled())) return NULL;
- hlist_for_each_entry_rcu(class, hash_head, hash_entry) { + hlist_for_each_entry_rcu_notrace(class, hash_head, hash_entry) { if (class->key == key) { /* * Huh! same key, different name? Did someone trample
From: Pawan Gupta pawan.kumar.gupta@linux.intel.com
[ Upstream commit 0817534ff9ea809fac1322c5c8c574be8483ea57 ]
Syzkaller reported use-after-free bug as described in [1]. The bug is triggered when smk_set_cipso() tries to free stale category bitmaps while there are concurrent reader(s) using the same bitmaps.
Wait for RCU grace period to finish before freeing the category bitmaps in smk_set_cipso(). This makes sure that there are no more readers using the stale bitmaps and freeing them should be safe.
[1] https://lore.kernel.org/netdev/000000000000a814c505ca657a4e@google.com/
Reported-by: syzbot+3f91de0b813cc3d19a80@syzkaller.appspotmail.com Signed-off-by: Pawan Gupta pawan.kumar.gupta@linux.intel.com Signed-off-by: Casey Schaufler casey@schaufler-ca.com Signed-off-by: Sasha Levin sashal@kernel.org --- security/smack/smackfs.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index 009e83ee2d002..25705a72d31bc 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -859,6 +859,7 @@ static int smk_open_cipso(struct inode *inode, struct file *file) static ssize_t smk_set_cipso(struct file *file, const char __user *buf, size_t count, loff_t *ppos, int format) { + struct netlbl_lsm_catmap *old_cat; struct smack_known *skp; struct netlbl_lsm_secattr ncats; char mapcatset[SMK_CIPSOLEN]; @@ -948,9 +949,11 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN); if (rc >= 0) { - netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat); + old_cat = skp->smk_netlabel.attr.mls.cat; skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat; skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl; + synchronize_rcu(); + netlbl_catmap_free(old_cat); rc = count; }
From: wangzhitong wangzhitong@uniontech.com
[ Upstream commit db9c8e2b1e246fc2dc20828932949437793146cc ]
this patch fixes below Errors reported by checkpatch ERROR: do not initialise globals to 0 +int cipso_v4_rbm_optfmt = 0;
Signed-off-by: wangzhitong wangzhitong@uniontech.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/cipso_ipv4.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c index e8b8dd1cb1576..75908722de47a 100644 --- a/net/ipv4/cipso_ipv4.c +++ b/net/ipv4/cipso_ipv4.c @@ -87,7 +87,7 @@ struct cipso_v4_map_cache_entry { static struct cipso_v4_map_cache_bkt *cipso_v4_cache;
/* Restricted bitmap (tag #1) flags */ -int cipso_v4_rbm_optfmt = 0; +int cipso_v4_rbm_optfmt; int cipso_v4_rbm_strictvalid = 1;
/*
From: Peter Zijlstra peterz@infradead.org
[ Upstream commit 7fae4c24a2b84a66c7be399727aca11e7a888462 ]
It turns out that a single page of stack is trivial to overflow with all the tracing gunk enabled. Raise the exception stacks to 2 pages, which is still half the interrupt stacks, which are at 4 pages.
Reported-by: Michael Wang yun.wang@linux.alibaba.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lkml.kernel.org/r/YUIO9Ye98S5Eb68w@hirez.programming.kicks-ass.net Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/include/asm/page_64_types.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index 50c8baaca4b06..4c807635e6244 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -20,7 +20,7 @@ #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) #define CURRENT_MASK (~(THREAD_SIZE - 1))
-#define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER) +#define EXCEPTION_STACK_ORDER (1 + KASAN_STACK_ORDER) #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
From: Jonas Dreßler verdre@v0yd.nl
[ Upstream commit c2e9666cdffd347460a2b17988db4cfaf2a68fb9 ]
We currently handle changing from the P2P to the STATION virtual interface type slightly different than changing from P2P to ADHOC: When changing to STATION, we don't send the SET_BSS_MODE command. We do send that command on all other type-changes though, and it probably makes sense to send the command since after all we just changed our BSS_MODE. Looking at prior changes to this part of the code, it seems that this is simply a leftover from old refactorings.
Since sending the SET_BSS_MODE command is the only difference between mwifiex_change_vif_to_sta_adhoc() and the current code, we can now use mwifiex_change_vif_to_sta_adhoc() for both switching to ADHOC and STATION interface type.
This does not fix any particular bug and just "looked right", so there's a small chance it might be a regression.
Signed-off-by: Jonas Dreßler verdre@v0yd.nl Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/20210914195909.36035-4-verdre@v0yd.nl Signed-off-by: Sasha Levin sashal@kernel.org --- .../net/wireless/marvell/mwifiex/cfg80211.c | 22 ++++--------------- 1 file changed, 4 insertions(+), 18 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c index 79c50aebffc4b..7bdcbe79d963d 100644 --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c @@ -1217,29 +1217,15 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy, break; case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_P2P_GO: + if (mwifiex_cfg80211_deinit_p2p(priv)) + return -EFAULT; + switch (type) { - case NL80211_IFTYPE_STATION: - if (mwifiex_cfg80211_deinit_p2p(priv)) - return -EFAULT; - priv->adapter->curr_iface_comb.p2p_intf--; - priv->adapter->curr_iface_comb.sta_intf++; - dev->ieee80211_ptr->iftype = type; - if (mwifiex_deinit_priv_params(priv)) - return -1; - if (mwifiex_init_new_priv_params(priv, dev, type)) - return -1; - if (mwifiex_sta_init_cmd(priv, false, false)) - return -1; - break; case NL80211_IFTYPE_ADHOC: - if (mwifiex_cfg80211_deinit_p2p(priv)) - return -EFAULT; + case NL80211_IFTYPE_STATION: return mwifiex_change_vif_to_sta_adhoc(dev, curr_iftype, type, params); - break; case NL80211_IFTYPE_AP: - if (mwifiex_cfg80211_deinit_p2p(priv)) - return -EFAULT; return mwifiex_change_vif_to_ap(dev, curr_iftype, type, params); case NL80211_IFTYPE_UNSPECIFIED:
On Mon, Nov 8, 2021 at 5:18 PM Sasha Levin sashal@kernel.org wrote:
From: Jonas Dreßler verdre@v0yd.nl
[ Upstream commit c2e9666cdffd347460a2b17988db4cfaf2a68fb9 ]
...
This does not fix any particular bug and just "looked right", so there's a small chance it might be a regression.
I won't insist on rejecting this one, but especially given this sentence, this doesn't really pass the smell test for -stable candidates. It's stuff like this that pushes me a bit toward the camp of those who despise the ML-based selection methods here, even though it occasionally (or even often) may produce some good.
Brian
On Tue, Nov 09, 2021 at 10:06:19AM -0800, Brian Norris wrote:
On Mon, Nov 8, 2021 at 5:18 PM Sasha Levin sashal@kernel.org wrote:
From: Jonas Dreßler verdre@v0yd.nl
[ Upstream commit c2e9666cdffd347460a2b17988db4cfaf2a68fb9 ]
...
This does not fix any particular bug and just "looked right", so there's a small chance it might be a regression.
I won't insist on rejecting this one, but especially given this sentence, this doesn't really pass the smell test for -stable candidates. It's stuff like this that pushes me a bit toward the camp of those who despise the ML-based selection methods here, even though it occasionally (or even often) may produce some good.
I have hundreds of examples of patches that claim they are just an improvement but fix a serious bug :)
From: Jonas Dreßler verdre@v0yd.nl
[ Upstream commit c606008b70627a2fc485732a53cc22f0f66d0981 ]
When creating a new virtual interface in mwifiex_add_virtual_intf(), we update our internal driver states like bss_type, bss_priority, bss_role and bss_mode to reflect the mode the firmware will be set to.
When switching virtual interface mode using mwifiex_init_new_priv_params() though, we currently only update bss_mode and bss_role. In order for the interface mode switch to actually work, we also need to update bss_type to its proper value, so do that.
This fixes a crash of the firmware (because the driver tries to execute commands that are invalid in AP mode) when switching from station mode to AP mode.
Signed-off-by: Jonas Dreßler verdre@v0yd.nl Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/20210914195909.36035-9-verdre@v0yd.nl Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/marvell/mwifiex/cfg80211.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c index 7bdcbe79d963d..a88bddc383894 100644 --- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c +++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c @@ -898,16 +898,20 @@ mwifiex_init_new_priv_params(struct mwifiex_private *priv, switch (type) { case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_ADHOC: - priv->bss_role = MWIFIEX_BSS_ROLE_STA; + priv->bss_role = MWIFIEX_BSS_ROLE_STA; + priv->bss_type = MWIFIEX_BSS_TYPE_STA; break; case NL80211_IFTYPE_P2P_CLIENT: - priv->bss_role = MWIFIEX_BSS_ROLE_STA; + priv->bss_role = MWIFIEX_BSS_ROLE_STA; + priv->bss_type = MWIFIEX_BSS_TYPE_P2P; break; case NL80211_IFTYPE_P2P_GO: - priv->bss_role = MWIFIEX_BSS_ROLE_UAP; + priv->bss_role = MWIFIEX_BSS_ROLE_UAP; + priv->bss_type = MWIFIEX_BSS_TYPE_P2P; break; case NL80211_IFTYPE_AP: priv->bss_role = MWIFIEX_BSS_ROLE_UAP; + priv->bss_type = MWIFIEX_BSS_TYPE_UAP; break; default: mwifiex_dbg(adapter, ERROR,
From: Dirk Bender d.bender@phytec.de
[ Upstream commit 0961ba6dd211a4a52d1dd4c2d59be60ac2dc08c7 ]
To prevent corrupted frames after starting and stopping the sensor its datasheet specifies a specific pause sequence to follow:
Stopping: Set Pause_Restart Bit -> Set Restart Bit -> Set Chip_Enable Off
Restarting: Set Chip_Enable On -> Clear Pause_Restart Bit
The Restart Bit is cleared automatically and must not be cleared manually as this would cause undefined behavior.
Signed-off-by: Dirk Bender d.bender@phytec.de Signed-off-by: Stefan Riedmueller s.riedmueller@phytec.de Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/i2c/mt9p031.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c index 91d822fc4443a..8e6ad6a6e68cb 100644 --- a/drivers/media/i2c/mt9p031.c +++ b/drivers/media/i2c/mt9p031.c @@ -81,7 +81,9 @@ #define MT9P031_PIXEL_CLOCK_INVERT (1 << 15) #define MT9P031_PIXEL_CLOCK_SHIFT(n) ((n) << 8) #define MT9P031_PIXEL_CLOCK_DIVIDE(n) ((n) << 0) -#define MT9P031_FRAME_RESTART 0x0b +#define MT9P031_RESTART 0x0b +#define MT9P031_FRAME_PAUSE_RESTART (1 << 1) +#define MT9P031_FRAME_RESTART (1 << 0) #define MT9P031_SHUTTER_DELAY 0x0c #define MT9P031_RST 0x0d #define MT9P031_RST_ENABLE 1 @@ -448,9 +450,23 @@ static int mt9p031_set_params(struct mt9p031 *mt9p031) static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable) { struct mt9p031 *mt9p031 = to_mt9p031(subdev); + struct i2c_client *client = v4l2_get_subdevdata(subdev); + int val; int ret;
if (!enable) { + /* enable pause restart */ + val = MT9P031_FRAME_PAUSE_RESTART; + ret = mt9p031_write(client, MT9P031_RESTART, val); + if (ret < 0) + return ret; + + /* enable restart + keep pause restart set */ + val |= MT9P031_FRAME_RESTART; + ret = mt9p031_write(client, MT9P031_RESTART, val); + if (ret < 0) + return ret; + /* Stop sensor readout */ ret = mt9p031_set_output_control(mt9p031, MT9P031_OUTPUT_CONTROL_CEN, 0); @@ -470,6 +486,16 @@ static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable) if (ret < 0) return ret;
+ /* + * - clear pause restart + * - don't clear restart as clearing restart manually can cause + * undefined behavior + */ + val = MT9P031_FRAME_RESTART; + ret = mt9p031_write(client, MT9P031_RESTART, val); + if (ret < 0) + return ret; + return mt9p031_pll_enable(mt9p031); }
From: Zheyu Ma zheyuma97@gmail.com
[ Upstream commit dbb4cfea6efe979ed153bd59a6a527a90d3d0ab3 ]
The interrupt handling should be related to the firmware version. If the driver matches an old firmware, then the driver should not handle interrupt such as i2c or dma, otherwise it will cause some errors.
This log reveals it:
[ 27.708641] INFO: trying to register non-static key. [ 27.710851] The code is fine but needs lockdep annotation, or maybe [ 27.712010] you didn't initialize this object before use? [ 27.712396] turning off the locking correctness validator. [ 27.712787] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.12.4-g70e7f0549188-dirty #169 [ 27.713349] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 27.714149] Call Trace: [ 27.714329] <IRQ> [ 27.714480] dump_stack+0xba/0xf5 [ 27.714737] register_lock_class+0x873/0x8f0 [ 27.715052] ? __lock_acquire+0x323/0x1930 [ 27.715353] __lock_acquire+0x75/0x1930 [ 27.715636] lock_acquire+0x1dd/0x3e0 [ 27.715905] ? netup_i2c_interrupt+0x19/0x310 [ 27.716226] _raw_spin_lock_irqsave+0x4b/0x60 [ 27.716544] ? netup_i2c_interrupt+0x19/0x310 [ 27.716863] netup_i2c_interrupt+0x19/0x310 [ 27.717178] netup_unidvb_isr+0xd3/0x160 [ 27.717467] __handle_irq_event_percpu+0x53/0x3e0 [ 27.717808] handle_irq_event_percpu+0x35/0x90 [ 27.718129] handle_irq_event+0x39/0x60 [ 27.718409] handle_fasteoi_irq+0xc2/0x1d0 [ 27.718707] __common_interrupt+0x7f/0x150 [ 27.719008] common_interrupt+0xb4/0xd0 [ 27.719289] </IRQ> [ 27.719446] asm_common_interrupt+0x1e/0x40 [ 27.719747] RIP: 0010:native_safe_halt+0x17/0x20 [ 27.720084] Code: 07 0f 00 2d 8b ee 4c 00 f4 5d c3 0f 1f 84 00 00 00 00 00 8b 05 72 95 17 02 55 48 89 e5 85 c0 7e 07 0f 00 2d 6b ee 4c 00 fb f4 <5d> c3 cc cc cc cc cc cc cc 55 48 89 e5 e8 67 53 ff ff 8b 0d 29 f6 [ 27.721386] RSP: 0018:ffffc9000008fe90 EFLAGS: 00000246 [ 27.721758] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 27.722262] RDX: 0000000000000000 RSI: ffffffff85f7c054 RDI: ffffffff85ded4e6 [ 27.722770] RBP: ffffc9000008fe90 R08: 0000000000000001 R09: 0000000000000001 [ 27.723277] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff86a75408 [ 27.723781] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888100260000 [ 27.724289] default_idle+0x9/0x10 [ 27.724537] arch_cpu_idle+0xa/0x10 [ 27.724791] default_idle_call+0x6e/0x250 [ 27.725082] do_idle+0x1f0/0x2d0 [ 27.725326] cpu_startup_entry+0x18/0x20 [ 27.725613] start_secondary+0x11f/0x160 [ 27.725902] secondary_startup_64_no_verify+0xb0/0xbb [ 27.726272] BUG: kernel NULL pointer dereference, address: 0000000000000002 [ 27.726768] #PF: supervisor read access in kernel mode [ 27.727138] #PF: error_code(0x0000) - not-present page [ 27.727507] PGD 8000000118688067 P4D 8000000118688067 PUD 10feab067 PMD 0 [ 27.727999] Oops: 0000 [#1] PREEMPT SMP PTI [ 27.728302] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.12.4-g70e7f0549188-dirty #169 [ 27.728861] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 27.729660] RIP: 0010:netup_i2c_interrupt+0x23/0x310 [ 27.730019] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 af 6e 95 fd 48 89 df e8 e7 9f 1c 01 49 89 c5 48 8b 83 48 08 00 00 <66> 44 8b 60 02 44 89 e0 48 8b 93 48 08 00 00 83 e0 f8 66 89 42 02 [ 27.731339] RSP: 0018:ffffc90000118e90 EFLAGS: 00010046 [ 27.731716] RAX: 0000000000000000 RBX: ffff88810803c4d8 RCX: 0000000000000000 [ 27.732223] RDX: 0000000000000001 RSI: ffffffff85d37b94 RDI: ffff88810803c4d8 [ 27.732727] RBP: ffffc90000118ea8 R08: 0000000000000000 R09: 0000000000000001 [ 27.733239] R10: ffff88810803c4f0 R11: 61646e6f63657320 R12: 0000000000000000 [ 27.733745] R13: 0000000000000046 R14: ffff888101041000 R15: ffff8881081b2400 [ 27.734251] FS: 0000000000000000(0000) GS:ffff88817bc80000(0000) knlGS:0000000000000000 [ 27.734821] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.735228] CR2: 0000000000000002 CR3: 0000000108194000 CR4: 00000000000006e0 [ 27.735735] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.736241] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.736744] Call Trace: [ 27.736924] <IRQ> [ 27.737074] netup_unidvb_isr+0xd3/0x160 [ 27.737363] __handle_irq_event_percpu+0x53/0x3e0 [ 27.737706] handle_irq_event_percpu+0x35/0x90 [ 27.738028] handle_irq_event+0x39/0x60 [ 27.738306] handle_fasteoi_irq+0xc2/0x1d0 [ 27.738602] __common_interrupt+0x7f/0x150 [ 27.738899] common_interrupt+0xb4/0xd0 [ 27.739176] </IRQ> [ 27.739331] asm_common_interrupt+0x1e/0x40 [ 27.739633] RIP: 0010:native_safe_halt+0x17/0x20 [ 27.739967] Code: 07 0f 00 2d 8b ee 4c 00 f4 5d c3 0f 1f 84 00 00 00 00 00 8b 05 72 95 17 02 55 48 89 e5 85 c0 7e 07 0f 00 2d 6b ee 4c 00 fb f4 <5d> c3 cc cc cc cc cc cc cc 55 48 89 e5 e8 67 53 ff ff 8b 0d 29 f6 [ 27.741275] RSP: 0018:ffffc9000008fe90 EFLAGS: 00000246 [ 27.741647] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 27.742148] RDX: 0000000000000000 RSI: ffffffff85f7c054 RDI: ffffffff85ded4e6 [ 27.742652] RBP: ffffc9000008fe90 R08: 0000000000000001 R09: 0000000000000001 [ 27.743154] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff86a75408 [ 27.743652] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888100260000 [ 27.744157] default_idle+0x9/0x10 [ 27.744405] arch_cpu_idle+0xa/0x10 [ 27.744658] default_idle_call+0x6e/0x250 [ 27.744948] do_idle+0x1f0/0x2d0 [ 27.745190] cpu_startup_entry+0x18/0x20 [ 27.745475] start_secondary+0x11f/0x160 [ 27.745761] secondary_startup_64_no_verify+0xb0/0xbb [ 27.746123] Modules linked in: [ 27.746348] Dumping ftrace buffer: [ 27.746596] (ftrace buffer empty) [ 27.746852] CR2: 0000000000000002 [ 27.747094] ---[ end trace ebafd46f83ab946d ]--- [ 27.747424] RIP: 0010:netup_i2c_interrupt+0x23/0x310 [ 27.747778] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 af 6e 95 fd 48 89 df e8 e7 9f 1c 01 49 89 c5 48 8b 83 48 08 00 00 <66> 44 8b 60 02 44 89 e0 48 8b 93 48 08 00 00 83 e0 f8 66 89 42 02 [ 27.749082] RSP: 0018:ffffc90000118e90 EFLAGS: 00010046 [ 27.749461] RAX: 0000000000000000 RBX: ffff88810803c4d8 RCX: 0000000000000000 [ 27.749966] RDX: 0000000000000001 RSI: ffffffff85d37b94 RDI: ffff88810803c4d8 [ 27.750471] RBP: ffffc90000118ea8 R08: 0000000000000000 R09: 0000000000000001 [ 27.750976] R10: ffff88810803c4f0 R11: 61646e6f63657320 R12: 0000000000000000 [ 27.751480] R13: 0000000000000046 R14: ffff888101041000 R15: ffff8881081b2400 [ 27.751986] FS: 0000000000000000(0000) GS:ffff88817bc80000(0000) knlGS:0000000000000000 [ 27.752560] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.752970] CR2: 0000000000000002 CR3: 0000000108194000 CR4: 00000000000006e0 [ 27.753481] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.753984] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.754487] Kernel panic - not syncing: Fatal exception in interrupt [ 27.755033] Dumping ftrace buffer: [ 27.755279] (ftrace buffer empty) [ 27.755534] Kernel Offset: disabled [ 27.755785] Rebooting in 1 seconds..
Signed-off-by: Zheyu Ma zheyuma97@gmail.com Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- .../pci/netup_unidvb/netup_unidvb_core.c | 27 +++++++++++-------- 1 file changed, 16 insertions(+), 11 deletions(-)
diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c index 60e6cd5b3a032..03239fba87bf2 100644 --- a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c +++ b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c @@ -267,19 +267,24 @@ static irqreturn_t netup_unidvb_isr(int irq, void *dev_id) if ((reg40 & AVL_IRQ_ASSERTED) != 0) { /* IRQ is being signaled */ reg_isr = readw(ndev->bmmio0 + REG_ISR); - if (reg_isr & NETUP_UNIDVB_IRQ_I2C0) { - iret = netup_i2c_interrupt(&ndev->i2c[0]); - } else if (reg_isr & NETUP_UNIDVB_IRQ_I2C1) { - iret = netup_i2c_interrupt(&ndev->i2c[1]); - } else if (reg_isr & NETUP_UNIDVB_IRQ_SPI) { + if (reg_isr & NETUP_UNIDVB_IRQ_SPI) iret = netup_spi_interrupt(ndev->spi); - } else if (reg_isr & NETUP_UNIDVB_IRQ_DMA1) { - iret = netup_dma_interrupt(&ndev->dma[0]); - } else if (reg_isr & NETUP_UNIDVB_IRQ_DMA2) { - iret = netup_dma_interrupt(&ndev->dma[1]); - } else if (reg_isr & NETUP_UNIDVB_IRQ_CI) { - iret = netup_ci_interrupt(ndev); + else if (!ndev->old_fw) { + if (reg_isr & NETUP_UNIDVB_IRQ_I2C0) { + iret = netup_i2c_interrupt(&ndev->i2c[0]); + } else if (reg_isr & NETUP_UNIDVB_IRQ_I2C1) { + iret = netup_i2c_interrupt(&ndev->i2c[1]); + } else if (reg_isr & NETUP_UNIDVB_IRQ_DMA1) { + iret = netup_dma_interrupt(&ndev->dma[0]); + } else if (reg_isr & NETUP_UNIDVB_IRQ_DMA2) { + iret = netup_dma_interrupt(&ndev->dma[1]); + } else if (reg_isr & NETUP_UNIDVB_IRQ_CI) { + iret = netup_ci_interrupt(ndev); + } else { + goto err; + } } else { +err: dev_err(&pci_dev->dev, "%s(): unknown interrupt 0x%x\n", __func__, reg_isr);
From: Ricardo Ribalda ribalda@chromium.org
[ Upstream commit 97a2777a96070afb7da5d587834086c0b586c8cc ]
Fixes v4l2-compliance:
Format ioctls (Input 0): warn: v4l2-test-formats.cpp(1339): S_PARM is supported but doesn't report V4L2_CAP_TIMEPERFRAME fail: v4l2-test-formats.cpp(1241): node->has_frmintervals && !cap->capability
Reviewed-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Ricardo Ribalda ribalda@chromium.org Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/usb/uvc/uvc_v4l2.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index fae811b9cde96..2b0ca32d71965 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -446,10 +446,13 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, uvc_simplify_fraction(&timeperframe.numerator, &timeperframe.denominator, 8, 333);
- if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { parm->parm.capture.timeperframe = timeperframe; - else + parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + } else { parm->parm.output.timeperframe = timeperframe; + parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME; + }
return 0; }
From: Tuo Li islituo@gmail.com
[ Upstream commit 8515965e5e33f4feb56134348c95953f3eadfb26 ]
The variable pdev is assigned to dev->plat_dev, and dev->plat_dev is checked in: if (!dev->plat_dev)
This indicates both dev->plat_dev and pdev can be NULL. If so, the function dev_err() is called to print error information. dev_err(&pdev->dev, "No platform data specified\n");
However, &pdev->dev is an illegal address, and it is dereferenced in dev_err().
To fix this possible null-pointer dereference, replace dev_err() with mfc_err().
Reported-by: TOTE Robot oslab@tsinghua.edu.cn Signed-off-by: Tuo Li islituo@gmail.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/s5p-mfc/s5p_mfc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c index 9942932ecbf9c..63d46fae9b289 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1280,7 +1280,7 @@ static int s5p_mfc_probe(struct platform_device *pdev) spin_lock_init(&dev->condlock); dev->plat_dev = pdev; if (!dev->plat_dev) { - dev_err(&pdev->dev, "No platform data specified\n"); + mfc_err("No platform data specified\n"); return -ENODEV; }
From: Nadezda Lutovinova lutovinova@ispras.ru
[ Upstream commit cdfaf4752e6915a4b455ad4400133e540e4dc965 ]
If of_device_get_match_data() return NULL, then null pointer dereference occurs in s5p_mfc_init_pm(). The patch adds checking if dev->variant is NULL.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Nadezda Lutovinova lutovinova@ispras.ru Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c index 63d46fae9b289..75be40608bae8 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1285,6 +1285,10 @@ static int s5p_mfc_probe(struct platform_device *pdev) }
dev->variant = of_device_get_match_data(&pdev->dev); + if (!dev->variant) { + dev_err(&pdev->dev, "Failed to get device MFC hardware variant information\n"); + return -ENOENT; + }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
From: Rajat Asthana rajatasthana4@gmail.com
[ Upstream commit 476db72e521983ecb847e4013b263072bb1110fc ]
Syzkaller reported a warning called "rcu detected stall in dummy_timer".
The error seems to be an error in mceusb_dev_recv(). In the case of -EPROTO error, the routine immediately resubmits the URB. Instead it should return without resubmitting URB.
Reported-by: syzbot+4d3749e9612c2cfab956@syzkaller.appspotmail.com Signed-off-by: Rajat Asthana rajatasthana4@gmail.com Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/rc/mceusb.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c index bbbbfd697f9c4..035b2455b26aa 100644 --- a/drivers/media/rc/mceusb.c +++ b/drivers/media/rc/mceusb.c @@ -1080,6 +1080,7 @@ static void mceusb_dev_recv(struct urb *urb) case -ECONNRESET: case -ENOENT: case -EILSEQ: + case -EPROTO: case -ESHUTDOWN: usb_unlink_urb(urb); return;
From: Randy Dunlap rdunlap@infradead.org
[ Upstream commit c15b5fc054c3d6c97e953617605235c5cb8ce979 ]
When CONFIG_PRINTK is not set, the CMPXCHG_BUGCHECK() macro calls _printk(), but _printk() is a static inline function, not available as an extern. Since the purpose of the macro is to print the BUGCHECK info, make this config option depend on PRINTK.
Fixes multiple occurrences of this build error:
../include/linux/printk.h:208:5: error: static declaration of '_printk' follows non-static declaration 208 | int _printk(const char *s, ...) | ^~~~~~~ In file included from ../arch/ia64/include/asm/cmpxchg.h:5, ../arch/ia64/include/uapi/asm/cmpxchg.h:146:28: note: previous declaration of '_printk' with type 'int(const char *, ...)' 146 | extern int _printk(const char *fmt, ...);
Cc: linux-ia64@vger.kernel.org Cc: Andrew Morton akpm@linux-foundation.org Cc: Tony Luck tony.luck@intel.com Cc: Chris Down chris@chrisdown.name Cc: Paul Gortmaker paul.gortmaker@windriver.com Cc: John Paul Adrian Glaubitz glaubitz@physik.fu-berlin.de Signed-off-by: Randy Dunlap rdunlap@infradead.org Signed-off-by: Petr Mladek pmladek@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/ia64/Kconfig.debug | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/ia64/Kconfig.debug b/arch/ia64/Kconfig.debug index 677c409425df2..c27c13ca77f47 100644 --- a/arch/ia64/Kconfig.debug +++ b/arch/ia64/Kconfig.debug @@ -42,7 +42,7 @@ config DISABLE_VHPT
config IA64_DEBUG_CMPXCHG bool "Turn on compare-and-exchange bug checking (slow!)" - depends on DEBUG_KERNEL + depends on DEBUG_KERNEL && PRINTK help Selecting this option turns on bug checking for the IA-64 compare-and-exchange instructions. This is slow! Itaniums
From: "Rafael J. Wysocki" rafael.j.wysocki@intel.com
[ Upstream commit d3c4b6f64ad356c0d9ddbcf73fa471e6a841cc5c ]
ACPICA commit 0762982923f95eb652cf7ded27356b247c9774de
During wakeup from system-wide sleep states, acpi_get_sleep_type_data() is called and it tries to get memory from the slab allocator in order to evaluate a control method, but if KFENCE is enabled in the kernel, the memory allocation attempt causes an IRQ work to be queued and a self-IPI to be sent to the CPU running the code which requires the memory controller to be ready, so if that happens too early in the wakeup path, it doesn't work.
Prevent that from taking place by calling acpi_get_sleep_type_data() for S0 upfront, when preparing to enter a given sleep state, and saving the data obtained by it for later use during system wakeup.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214271 Reported-by: Reik Keutterling spielkind@gmail.com Tested-by: Reik Keutterling spielkind@gmail.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/acpica/acglobal.h | 2 ++ drivers/acpi/acpica/hwesleep.c | 8 ++------ drivers/acpi/acpica/hwsleep.c | 11 ++++------- drivers/acpi/acpica/hwxfsleep.c | 7 +++++++ 4 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 95eed442703f2..2f4a3fee69e70 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -255,6 +255,8 @@ extern struct acpi_bit_register_info
ACPI_GLOBAL(u8, acpi_gbl_sleep_type_a); ACPI_GLOBAL(u8, acpi_gbl_sleep_type_b); +ACPI_GLOBAL(u8, acpi_gbl_sleep_type_a_s0); +ACPI_GLOBAL(u8, acpi_gbl_sleep_type_b_s0);
/***************************************************************************** * diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c index 12626d021a9b5..7f8c57177819f 100644 --- a/drivers/acpi/acpica/hwesleep.c +++ b/drivers/acpi/acpica/hwesleep.c @@ -181,17 +181,13 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)
acpi_status acpi_hw_extended_wake_prep(u8 sleep_state) { - acpi_status status; u8 sleep_type_value;
ACPI_FUNCTION_TRACE(hw_extended_wake_prep);
- status = acpi_get_sleep_type_data(ACPI_STATE_S0, - &acpi_gbl_sleep_type_a, - &acpi_gbl_sleep_type_b); - if (ACPI_SUCCESS(status)) { + if (acpi_gbl_sleep_type_a_s0 != ACPI_SLEEP_TYPE_INVALID) { sleep_type_value = - ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & + ((acpi_gbl_sleep_type_a_s0 << ACPI_X_SLEEP_TYPE_POSITION) & ACPI_X_SLEEP_TYPE_MASK);
(void)acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE), diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c index 1fe7387a00e67..2c54d08b20ca6 100644 --- a/drivers/acpi/acpica/hwsleep.c +++ b/drivers/acpi/acpica/hwsleep.c @@ -218,7 +218,7 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state) { - acpi_status status; + acpi_status status = AE_OK; struct acpi_bit_register_info *sleep_type_reg_info; struct acpi_bit_register_info *sleep_enable_reg_info; u32 pm1a_control; @@ -231,10 +231,7 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state) * This is unclear from the ACPI Spec, but it is required * by some machines. */ - status = acpi_get_sleep_type_data(ACPI_STATE_S0, - &acpi_gbl_sleep_type_a, - &acpi_gbl_sleep_type_b); - if (ACPI_SUCCESS(status)) { + if (acpi_gbl_sleep_type_a_s0 != ACPI_SLEEP_TYPE_INVALID) { sleep_type_reg_info = acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE); sleep_enable_reg_info = @@ -255,9 +252,9 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
/* Insert the SLP_TYP bits */
- pm1a_control |= (acpi_gbl_sleep_type_a << + pm1a_control |= (acpi_gbl_sleep_type_a_s0 << sleep_type_reg_info->bit_position); - pm1b_control |= (acpi_gbl_sleep_type_b << + pm1b_control |= (acpi_gbl_sleep_type_b_s0 << sleep_type_reg_info->bit_position);
/* Write the control registers and ignore any errors */ diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c index e5c095ca6083a..827c3242225d9 100644 --- a/drivers/acpi/acpica/hwxfsleep.c +++ b/drivers/acpi/acpica/hwxfsleep.c @@ -322,6 +322,13 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) return_ACPI_STATUS(status); }
+ status = acpi_get_sleep_type_data(ACPI_STATE_S0, + &acpi_gbl_sleep_type_a_s0, + &acpi_gbl_sleep_type_b_s0); + if (ACPI_FAILURE(status)) { + acpi_gbl_sleep_type_a_s0 = ACPI_SLEEP_TYPE_INVALID; + } + /* Execute the _PTS method (Prepare To Sleep) */
arg_list.count = 1;
From: Anant Thazhemadam anant.thazhemadam@gmail.com
[ Upstream commit 899a61a3305d49e8a712e9ab20d0db94bde5929f ]
In dibusb_read_eeprom_byte(), if dibusb_i2c_msg() fails, val gets assigned an value that's not properly initialized. Using kzalloc() in place of kmalloc() for the buffer fixes this issue, as the val can now be set to 0 in the event dibusb_i2c_msg() fails.
Reported-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com Tested-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com Signed-off-by: Anant Thazhemadam anant.thazhemadam@gmail.com Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/usb/dvb-usb/dibusb-common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/usb/dvb-usb/dibusb-common.c b/drivers/media/usb/dvb-usb/dibusb-common.c index bcacb0f220282..3e45642ae186b 100644 --- a/drivers/media/usb/dvb-usb/dibusb-common.c +++ b/drivers/media/usb/dvb-usb/dibusb-common.c @@ -226,7 +226,7 @@ int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val) u8 *buf; int rc;
- buf = kmalloc(2, GFP_KERNEL); + buf = kzalloc(2, GFP_KERNEL); if (!buf) return -ENOMEM;
From: "Steven Rostedt (VMware)" rostedt@goodmis.org
[ Upstream commit 49d67e445742bbcb03106b735b2ab39f6e5c56bc ]
The tracefs file system is by default mounted such that only root user can access it. But there are legitimate reasons to create a group and allow those added to the group to have access to tracing. By changing the permissions of the tracefs mount point to allow access, it will allow group access to the tracefs directory.
There should not be any real reason to allow all access to the tracefs directory as it contains sensitive information. Have the default permission of directories being created not have any OTH (other) bits set, such that an admin that wants to give permission to a group has to first disable all OTH bits in the file system.
Link: https://lkml.kernel.org/r/20210818153038.664127804@goodmis.org
Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/tracefs/inode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c index bea8ad876bf9a..0c123c5e70e08 100644 --- a/fs/tracefs/inode.c +++ b/fs/tracefs/inode.c @@ -427,7 +427,8 @@ static struct dentry *__create_dir(const char *name, struct dentry *parent, if (unlikely(!inode)) return failed_creating(dentry);
- inode->i_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO; + /* Do not set bits for OTH */ + inode->i_mode = S_IFDIR | S_IRWXU | S_IRUSR| S_IRGRP | S_IXUSR | S_IXGRP; inode->i_op = ops; inode->i_fop = &simple_dir_operations;
From: Tuo Li islituo@gmail.com
[ Upstream commit 4b6012a7830b813799a7faf40daa02a837e0fd5b ]
kzalloc() is used to allocate memory for cd->detectors, and if it fails, channel_detector_exit() behind the label fail will be called: channel_detector_exit(dpd, cd);
In channel_detector_exit(), cd->detectors is dereferenced through: struct pri_detector *de = cd->detectors[i];
To fix this possible null-pointer dereference, check cd->detectors before the for loop to dereference cd->detectors.
Reported-by: TOTE Robot oslab@tsinghua.edu.cn Signed-off-by: Tuo Li islituo@gmail.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/20210805153854.154066-1-islituo@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/ath/dfs_pattern_detector.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ath/dfs_pattern_detector.c b/drivers/net/wireless/ath/dfs_pattern_detector.c index 78146607f16e8..acd85e5069346 100644 --- a/drivers/net/wireless/ath/dfs_pattern_detector.c +++ b/drivers/net/wireless/ath/dfs_pattern_detector.c @@ -182,10 +182,12 @@ static void channel_detector_exit(struct dfs_pattern_detector *dpd, if (cd == NULL) return; list_del(&cd->head); - for (i = 0; i < dpd->num_radar_types; i++) { - struct pri_detector *de = cd->detectors[i]; - if (de != NULL) - de->exit(de); + if (cd->detectors) { + for (i = 0; i < dpd->num_radar_types; i++) { + struct pri_detector *de = cd->detectors[i]; + if (de != NULL) + de->exit(de); + } } kfree(cd->detectors); kfree(cd);
From: André Almeida andrealmeid@collabora.com
[ Upstream commit 2835f327bd1240508db2c89fe94a056faa53c49a ]
Some buggy firmware and/or brand new batteries can support a charge that's slightly over the reported design capacity. In such cases, the kernel will report to userspace that the charging state of the battery is "Unknown", when in reality the battery charge is "Full", at least from the design capacity point of view. Make the fallback condition accepts capacities over the designed capacity so userspace knows that is full.
Signed-off-by: André Almeida andrealmeid@collabora.com Reviewed-by: Hans de Goede hdegoede@redhat.com Reviewed-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/battery.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index 13e7b56e33aeb..30996effc491b 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -193,7 +193,7 @@ static int acpi_battery_is_charged(struct acpi_battery *battery) return 1;
/* fallback to using design values for broken batteries */ - if (battery->design_capacity == battery->capacity_now) + if (battery->design_capacity <= battery->capacity_now) return 1;
/* we don't do any sort of metric based on percentages */
From: Kees Cook keescook@chromium.org
[ Upstream commit cf2a85efdade117e2169d6e26641016cbbf03ef0 ]
For files that lack trailing newlines and match a leaking address (e.g. wchan[1]), the leaking_addresses.pl report would run together with the next line, making things look corrupted.
Unconditionally remove the newline on input, and write it back out on output.
[1] https://lore.kernel.org/all/20210103142726.GC30643@xsang-OptiPlex-9020/
Signed-off-by: Kees Cook keescook@chromium.org Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lkml.kernel.org/r/20211008111626.151570317@infradead.org Signed-off-by: Sasha Levin sashal@kernel.org --- scripts/leaking_addresses.pl | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/scripts/leaking_addresses.pl b/scripts/leaking_addresses.pl index 2977371b29563..de5196c08943a 100755 --- a/scripts/leaking_addresses.pl +++ b/scripts/leaking_addresses.pl @@ -262,8 +262,9 @@ sub parse_file
open my $fh, "<", $file or return; while ( <$fh> ) { + chomp; if (may_leak_address($_)) { - print $file . ': ' . $_; + printf("$file: $_\n"); } } close $fh;
From: Zheyu Ma zheyuma97@gmail.com
[ Upstream commit 738216c1953e802aa9f930c5d15b8f9092c847ff ]
In r592_remove(), the driver will free dma after freeing the host, which may cause a UAF bug.
The following log reveals it:
[ 45.361796 ] BUG: KASAN: use-after-free in r592_remove+0x269/0x350 [r592] [ 45.364286 ] Call Trace: [ 45.364472 ] dump_stack_lvl+0xa8/0xd1 [ 45.364751 ] print_address_description+0x87/0x3b0 [ 45.365137 ] kasan_report+0x172/0x1c0 [ 45.365415 ] ? r592_remove+0x269/0x350 [r592] [ 45.365834 ] ? r592_remove+0x269/0x350 [r592] [ 45.366168 ] __asan_report_load8_noabort+0x14/0x20 [ 45.366531 ] r592_remove+0x269/0x350 [r592] [ 45.378785 ] [ 45.378903 ] Allocated by task 4674: [ 45.379162 ] ____kasan_kmalloc+0xb5/0xe0 [ 45.379455 ] __kasan_kmalloc+0x9/0x10 [ 45.379730 ] __kmalloc+0x150/0x280 [ 45.379984 ] memstick_alloc_host+0x2a/0x190 [ 45.380664 ] [ 45.380781 ] Freed by task 5509: [ 45.381014 ] kasan_set_track+0x3d/0x70 [ 45.381293 ] kasan_set_free_info+0x23/0x40 [ 45.381635 ] ____kasan_slab_free+0x10b/0x140 [ 45.381950 ] __kasan_slab_free+0x11/0x20 [ 45.382241 ] slab_free_freelist_hook+0x81/0x150 [ 45.382575 ] kfree+0x13e/0x290 [ 45.382805 ] memstick_free+0x1c/0x20 [ 45.383070 ] device_release+0x9c/0x1d0 [ 45.383349 ] kobject_put+0x2ef/0x4c0 [ 45.383616 ] put_device+0x1f/0x30 [ 45.383865 ] memstick_free_host+0x24/0x30 [ 45.384162 ] r592_remove+0x242/0x350 [r592] [ 45.384473 ] pci_device_remove+0xa9/0x250
Signed-off-by: Zheyu Ma zheyuma97@gmail.com Link: https://lore.kernel.org/r/1634383581-11055-1-git-send-email-zheyuma97@gmail.... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/memstick/host/r592.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c index 2539984c1db1c..256634ec58b63 100644 --- a/drivers/memstick/host/r592.c +++ b/drivers/memstick/host/r592.c @@ -841,15 +841,15 @@ static void r592_remove(struct pci_dev *pdev) } memstick_remove_host(dev->host);
+ if (dev->dummy_dma_page) + dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->dummy_dma_page, + dev->dummy_dma_page_physical_address); + free_irq(dev->irq, dev); iounmap(dev->mmio); pci_release_regions(pdev); pci_disable_device(pdev); memstick_free_host(dev->host); - - if (dev->dummy_dma_page) - dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->dummy_dma_page, - dev->dummy_dma_page_physical_address); }
#ifdef CONFIG_PM_SLEEP
From: Lasse Collin lasse.collin@tukaani.org
[ Upstream commit 83d3c4f22a36d005b55f44628f46cc0d319a75e8 ]
With valid files, the safety margin described in lib/decompress_unxz.c ensures that these buffers cannot overlap. But if the uncompressed size of the input is larger than the caller thought, which is possible when the input file is invalid/corrupt, the buffers can overlap. Obviously the result will then be garbage (and usually the decoder will return an error too) but no other harm will happen when such an over-run occurs.
This change only affects uncompressed LZMA2 chunks and so this should have no effect on performance.
Link: https://lore.kernel.org/r/20211010213145.17462-2-xiang@kernel.org Signed-off-by: Lasse Collin lasse.collin@tukaani.org Signed-off-by: Gao Xiang hsiangkao@linux.alibaba.com Signed-off-by: Sasha Levin sashal@kernel.org --- lib/decompress_unxz.c | 2 +- lib/xz/xz_dec_lzma2.c | 21 +++++++++++++++++++-- 2 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/lib/decompress_unxz.c b/lib/decompress_unxz.c index 25d59a95bd668..abea25310ac73 100644 --- a/lib/decompress_unxz.c +++ b/lib/decompress_unxz.c @@ -167,7 +167,7 @@ * memeq and memzero are not used much and any remotely sane implementation * is fast enough. memcpy/memmove speed matters in multi-call mode, but * the kernel image is decompressed in single-call mode, in which only - * memcpy speed can matter and only if there is a lot of uncompressible data + * memmove speed can matter and only if there is a lot of uncompressible data * (LZMA2 stores uncompressible chunks in uncompressed form). Thus, the * functions below should just be kept small; it's probably not worth * optimizing for speed. diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c index 08c3c80499983..2c5197d6b944d 100644 --- a/lib/xz/xz_dec_lzma2.c +++ b/lib/xz/xz_dec_lzma2.c @@ -387,7 +387,14 @@ static void dict_uncompressed(struct dictionary *dict, struct xz_buf *b,
*left -= copy_size;
- memcpy(dict->buf + dict->pos, b->in + b->in_pos, copy_size); + /* + * If doing in-place decompression in single-call mode and the + * uncompressed size of the file is larger than the caller + * thought (i.e. it is invalid input!), the buffers below may + * overlap and cause undefined behavior with memcpy(). + * With valid inputs memcpy() would be fine here. + */ + memmove(dict->buf + dict->pos, b->in + b->in_pos, copy_size); dict->pos += copy_size;
if (dict->full < dict->pos) @@ -397,7 +404,11 @@ static void dict_uncompressed(struct dictionary *dict, struct xz_buf *b, if (dict->pos == dict->end) dict->pos = 0;
- memcpy(b->out + b->out_pos, b->in + b->in_pos, + /* + * Like above but for multi-call mode: use memmove() + * to avoid undefined behavior with invalid input. + */ + memmove(b->out + b->out_pos, b->in + b->in_pos, copy_size); }
@@ -421,6 +432,12 @@ static uint32_t dict_flush(struct dictionary *dict, struct xz_buf *b) if (dict->pos == dict->end) dict->pos = 0;
+ /* + * These buffers cannot overlap even if doing in-place + * decompression because in multi-call mode dict->buf + * has been allocated by us in this file; it's not + * provided by the caller like in single-call mode. + */ memcpy(b->out + b->out_pos, dict->buf + dict->start, copy_size); }
From: Lasse Collin lasse.collin@tukaani.org
[ Upstream commit 4f8d7abaa413c34da9d751289849dbfb7c977d05 ]
This might matter, for example, if the underlying type of enum xz_check was a signed char. In such a case the validation wouldn't have caught an unsupported header. I don't know if this problem can occur in the kernel on any arch but it's still good to fix it because some people might copy the XZ code to their own projects from Linux instead of the upstream XZ Embedded repository.
This change may increase the code size by a few bytes. An alternative would have been to use an unsigned int instead of enum xz_check but using an enumeration looks cleaner.
Link: https://lore.kernel.org/r/20211010213145.17462-3-xiang@kernel.org Signed-off-by: Lasse Collin lasse.collin@tukaani.org Signed-off-by: Gao Xiang hsiangkao@linux.alibaba.com Signed-off-by: Sasha Levin sashal@kernel.org --- lib/xz/xz_dec_stream.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c index ac809b1e64f78..9e5b9ab537fea 100644 --- a/lib/xz/xz_dec_stream.c +++ b/lib/xz/xz_dec_stream.c @@ -402,12 +402,12 @@ static enum xz_ret dec_stream_header(struct xz_dec *s) * we will accept other check types too, but then the check won't * be verified and a warning (XZ_UNSUPPORTED_CHECK) will be given. */ + if (s->temp.buf[HEADER_MAGIC_SIZE + 1] > XZ_CHECK_MAX) + return XZ_OPTIONS_ERROR; + s->check_type = s->temp.buf[HEADER_MAGIC_SIZE + 1];
#ifdef XZ_DEC_ANY_CHECK - if (s->check_type > XZ_CHECK_MAX) - return XZ_OPTIONS_ERROR; - if (s->check_type > XZ_CHECK_CRC32) return XZ_UNSUPPORTED_CHECK; #else
From: Kalesh Singh kaleshsingh@google.com
[ Upstream commit 7ce1bb83a14019f8c396d57ec704d19478747716 ]
If CONFIG_CFI_CLANG=y, attempting to read an event histogram will cause the kernel to panic due to failed CFI check.
1. echo 'hist:keys=common_pid' >> events/sched/sched_switch/trigger 2. cat events/sched/sched_switch/hist 3. kernel panics on attempting to read hist
This happens because the sort() function expects a generic int (*)(const void *, const void *) pointer for the compare function. To prevent this CFI failure, change tracing map cmp_entries_* function signatures to match this.
Also, fix the build error reported by the kernel test robot [1].
[1] https://lore.kernel.org/r/202110141140.zzi4dRh4-lkp@intel.com/
Link: https://lkml.kernel.org/r/20211014045217.3265162-1-kaleshsingh@google.com
Signed-off-by: Kalesh Singh kaleshsingh@google.com Reported-by: kernel test robot lkp@intel.com Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/trace/tracing_map.c | 40 ++++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 17 deletions(-)
diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c index 35b2ba07f3c6f..379db35838b64 100644 --- a/kernel/trace/tracing_map.c +++ b/kernel/trace/tracing_map.c @@ -703,29 +703,35 @@ int tracing_map_init(struct tracing_map *map) return err; }
-static int cmp_entries_dup(const struct tracing_map_sort_entry **a, - const struct tracing_map_sort_entry **b) +static int cmp_entries_dup(const void *A, const void *B) { + const struct tracing_map_sort_entry *a, *b; int ret = 0;
- if (memcmp((*a)->key, (*b)->key, (*a)->elt->map->key_size)) + a = *(const struct tracing_map_sort_entry **)A; + b = *(const struct tracing_map_sort_entry **)B; + + if (memcmp(a->key, b->key, a->elt->map->key_size)) ret = 1;
return ret; }
-static int cmp_entries_sum(const struct tracing_map_sort_entry **a, - const struct tracing_map_sort_entry **b) +static int cmp_entries_sum(const void *A, const void *B) { const struct tracing_map_elt *elt_a, *elt_b; + const struct tracing_map_sort_entry *a, *b; struct tracing_map_sort_key *sort_key; struct tracing_map_field *field; tracing_map_cmp_fn_t cmp_fn; void *val_a, *val_b; int ret = 0;
- elt_a = (*a)->elt; - elt_b = (*b)->elt; + a = *(const struct tracing_map_sort_entry **)A; + b = *(const struct tracing_map_sort_entry **)B; + + elt_a = a->elt; + elt_b = b->elt;
sort_key = &elt_a->map->sort_key;
@@ -742,18 +748,21 @@ static int cmp_entries_sum(const struct tracing_map_sort_entry **a, return ret; }
-static int cmp_entries_key(const struct tracing_map_sort_entry **a, - const struct tracing_map_sort_entry **b) +static int cmp_entries_key(const void *A, const void *B) { const struct tracing_map_elt *elt_a, *elt_b; + const struct tracing_map_sort_entry *a, *b; struct tracing_map_sort_key *sort_key; struct tracing_map_field *field; tracing_map_cmp_fn_t cmp_fn; void *val_a, *val_b; int ret = 0;
- elt_a = (*a)->elt; - elt_b = (*b)->elt; + a = *(const struct tracing_map_sort_entry **)A; + b = *(const struct tracing_map_sort_entry **)B; + + elt_a = a->elt; + elt_b = b->elt;
sort_key = &elt_a->map->sort_key;
@@ -926,10 +935,8 @@ static void sort_secondary(struct tracing_map *map, struct tracing_map_sort_key *primary_key, struct tracing_map_sort_key *secondary_key) { - int (*primary_fn)(const struct tracing_map_sort_entry **, - const struct tracing_map_sort_entry **); - int (*secondary_fn)(const struct tracing_map_sort_entry **, - const struct tracing_map_sort_entry **); + int (*primary_fn)(const void *, const void *); + int (*secondary_fn)(const void *, const void *); unsigned i, start = 0, n_sub = 1;
if (is_key(map, primary_key->field_idx)) @@ -998,8 +1005,7 @@ int tracing_map_sort_entries(struct tracing_map *map, unsigned int n_sort_keys, struct tracing_map_sort_entry ***sort_entries) { - int (*cmp_entries_fn)(const struct tracing_map_sort_entry **, - const struct tracing_map_sort_entry **); + int (*cmp_entries_fn)(const void *, const void *); struct tracing_map_sort_entry *sort_entry, **entries; int i, n_entries, ret;
From: Zheyu Ma zheyuma97@gmail.com
[ Upstream commit 257051a235c17e33782b6e24a4b17f2d7915aaec ]
When the driver fails to request the firmware, it calls its error handler. In the error handler, the driver detaches device from driver first before releasing the firmware, which can cause a use-after-free bug.
Fix this by releasing firmware first.
The following log reveals it:
[ 9.007301 ] BUG: KASAN: use-after-free in mwl8k_fw_state_machine+0x320/0xba0 [ 9.010143 ] Workqueue: events request_firmware_work_func [ 9.010830 ] Call Trace: [ 9.010830 ] dump_stack_lvl+0xa8/0xd1 [ 9.010830 ] print_address_description+0x87/0x3b0 [ 9.010830 ] kasan_report+0x172/0x1c0 [ 9.010830 ] ? mutex_unlock+0xd/0x10 [ 9.010830 ] ? mwl8k_fw_state_machine+0x320/0xba0 [ 9.010830 ] ? mwl8k_fw_state_machine+0x320/0xba0 [ 9.010830 ] __asan_report_load8_noabort+0x14/0x20 [ 9.010830 ] mwl8k_fw_state_machine+0x320/0xba0 [ 9.010830 ] ? mwl8k_load_firmware+0x5f0/0x5f0 [ 9.010830 ] request_firmware_work_func+0x172/0x250 [ 9.010830 ] ? read_lock_is_recursive+0x20/0x20 [ 9.010830 ] ? process_one_work+0x7a1/0x1100 [ 9.010830 ] ? request_firmware_nowait+0x460/0x460 [ 9.010830 ] ? __this_cpu_preempt_check+0x13/0x20 [ 9.010830 ] process_one_work+0x9bb/0x1100
Signed-off-by: Zheyu Ma zheyuma97@gmail.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/1634356979-6211-1-git-send-email-zheyuma97@gmail.c... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/marvell/mwl8k.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c index e39aaee92addb..d5f766044221a 100644 --- a/drivers/net/wireless/marvell/mwl8k.c +++ b/drivers/net/wireless/marvell/mwl8k.c @@ -5788,8 +5788,8 @@ static void mwl8k_fw_state_machine(const struct firmware *fw, void *context) fail: priv->fw_state = FW_STATE_ERROR; complete(&priv->firmware_loading_complete); - device_release_driver(&priv->pdev->dev); mwl8k_release_firmware(priv); + device_release_driver(&priv->pdev->dev); }
#define MAX_RESTART_ATTEMPTS 1
From: Ye Bin yebin10@huawei.com
[ Upstream commit 39fbef4b0f77f9c89c8f014749ca533643a37c9f ]
The following kernel crash can be triggered:
[ 89.266592] ------------[ cut here ]------------ [ 89.267427] kernel BUG at fs/buffer.c:3020! [ 89.268264] invalid opcode: 0000 [#1] SMP KASAN PTI [ 89.269116] CPU: 7 PID: 1750 Comm: kmmpd-loop0 Not tainted 5.10.0-862.14.0.6.x86_64-08610-gc932cda3cef4-dirty #20 [ 89.273169] RIP: 0010:submit_bh_wbc.isra.0+0x538/0x6d0 [ 89.277157] RSP: 0018:ffff888105ddfd08 EFLAGS: 00010246 [ 89.278093] RAX: 0000000000000005 RBX: ffff888124231498 RCX: ffffffffb2772612 [ 89.279332] RDX: 1ffff11024846293 RSI: 0000000000000008 RDI: ffff888124231498 [ 89.280591] RBP: ffff8881248cc000 R08: 0000000000000001 R09: ffffed1024846294 [ 89.281851] R10: ffff88812423149f R11: ffffed1024846293 R12: 0000000000003800 [ 89.283095] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881161f7000 [ 89.284342] FS: 0000000000000000(0000) GS:ffff88839b5c0000(0000) knlGS:0000000000000000 [ 89.285711] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.286701] CR2: 00007f166ebc01a0 CR3: 0000000435c0e000 CR4: 00000000000006e0 [ 89.287919] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.289138] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.290368] Call Trace: [ 89.290842] write_mmp_block+0x2ca/0x510 [ 89.292218] kmmpd+0x433/0x9a0 [ 89.294902] kthread+0x2dd/0x3e0 [ 89.296268] ret_from_fork+0x22/0x30 [ 89.296906] Modules linked in:
by running the following commands:
1. mkfs.ext4 -O mmp /dev/sda -b 1024 2. mount /dev/sda /home/test 3. echo "/dev/sda" > /sys/power/resume
That happens because swsusp_check() calls set_blocksize() on the target partition which confuses the file system:
Thread1 Thread2 mount /dev/sda /home/test get s_mmp_bh --> has mapped flag start kmmpd thread echo "/dev/sda" > /sys/power/resume resume_store software_resume swsusp_check set_blocksize truncate_inode_pages_range truncate_cleanup_page block_invalidatepage discard_buffer --> clean mapped flag write_mmp_block submit_bh submit_bh_wbc BUG_ON(!buffer_mapped(bh))
To address this issue, modify swsusp_check() to open the target block device with exclusive access.
Signed-off-by: Ye Bin yebin10@huawei.com [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/power/swap.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/power/swap.c b/kernel/power/swap.c index d7cdc426ee380..2bd3670a093de 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -1526,9 +1526,10 @@ int swsusp_read(unsigned int *flags_p) int swsusp_check(void) { int error; + void *holder;
hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, - FMODE_READ, NULL); + FMODE_READ | FMODE_EXCL, &holder); if (!IS_ERR(hib_resume_bdev)) { set_blocksize(hib_resume_bdev, PAGE_SIZE); clear_page(swsusp_header); @@ -1550,7 +1551,7 @@ int swsusp_check(void)
put: if (error) - blkdev_put(hib_resume_bdev, FMODE_READ); + blkdev_put(hib_resume_bdev, FMODE_READ | FMODE_EXCL); else pr_debug("PM: Image signature found, resuming\n"); } else {
From: Johannes Berg johannes.berg@intel.com
[ Upstream commit e5322b9ab5f63536c41301150b7ce64605ce52cc ]
Just like we have default SMPS mode as dynamic in powersave, we should not enable RX-diversity in powersave, to reduce power consumption when connected to a non-MIMO AP.
Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Luca Coelho luciano.coelho@intel.com Link: https://lore.kernel.org/r/iwlwifi.20211017113927.fc896bc5cdaa.I1d11da71b8a5c... Signed-off-by: Luca Coelho luciano.coelho@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c index d2cada0ab4264..3303fc85d76f5 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c @@ -1029,6 +1029,9 @@ bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
lockdep_assert_held(&mvm->mutex);
+ if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM) + return false; + if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1) return false;
From: Tetsuo Handa penguin-kernel@i-love.sakura.ne.jp
[ Upstream commit f91488ee15bd3cac467e2d6a361fc2d34d1052ae ]
syzbot is reporting kernel panic at smk_cipso_doi() due to memory allocation fault injection [1]. The reason for need to use panic() was not explained. But since no fix was proposed for 18 months, for now let's use __GFP_NOFAIL for utilizing syzbot resource on other bugs.
Link: https://syzkaller.appspot.com/bug?extid=89731ccb6fec15ce1c22 [1] Reported-by: syzbot syzbot+89731ccb6fec15ce1c22@syzkaller.appspotmail.com Signed-off-by: Tetsuo Handa penguin-kernel@I-love.SAKURA.ne.jp Signed-off-by: Casey Schaufler casey@schaufler-ca.com Signed-off-by: Sasha Levin sashal@kernel.org --- security/smack/smackfs.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c index 25705a72d31bc..9fdf404a318f9 100644 --- a/security/smack/smackfs.c +++ b/security/smack/smackfs.c @@ -721,9 +721,7 @@ static void smk_cipso_doi(void) printk(KERN_WARNING "%s:%d remove rc = %d\n", __func__, __LINE__, rc);
- doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL); - if (doip == NULL) - panic("smack: Failed to initialize cipso DOI.\n"); + doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL | __GFP_NOFAIL); doip->map.std = NULL; doip->doi = smk_cipso_doi_value; doip->type = CIPSO_V4_MAP_PASS;
From: Masami Hiramatsu mhiramat@kernel.org
[ Upstream commit b3ea5d56f212ad81328c82454829a736197ebccc ]
Currently the stacktrace on clang compiled arm kernel uses the 'lr' register to find the first frame address from pt_regs. However, that is wrong after calling another function, because the 'lr' register is used by 'bl' instruction and never be recovered.
As same as gcc arm kernel, directly use the frame pointer (r11) of the pt_regs to find the first frame address.
Note that this fixes kretprobe stacktrace issue only with CONFIG_UNWINDER_FRAME_POINTER=y. For the CONFIG_UNWINDER_ARM, we need another fix.
Signed-off-by: Masami Hiramatsu mhiramat@kernel.org Reviewed-by: Nick Desaulniers ndesaulniers@google.com Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/kernel/stacktrace.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c index ba9b9a77bcd2c..31af81d46aaed 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -52,8 +52,7 @@ int notrace unwind_frame(struct stackframe *frame)
frame->sp = frame->fp; frame->fp = *(unsigned long *)(fp); - frame->pc = frame->lr; - frame->lr = *(unsigned long *)(fp + 4); + frame->pc = *(unsigned long *)(fp + 4); #else /* check current frame pointer is within bounds */ if (fp < low + 12 || fp > high - 4)
From: Stephen Suryaputra ssuryaextr@gmail.com
[ Upstream commit 61e18ce7348bfefb5688a8bcd4b4d6b37c0f9b2a ]
When addr_gen_mode is set to IN6_ADDR_GEN_MODE_NONE, the link-local addr should not be generated. But it isn't the case for GRE (as well as GRE6) and SIT tunnels. Make it so that tunnels consider the addr_gen_mode, especially for IN6_ADDR_GEN_MODE_NONE.
Do this in add_v4_addrs() to cover both GRE and SIT only if the addr scope is link.
Signed-off-by: Stephen Suryaputra ssuryaextr@gmail.com Acked-by: Antonio Quartulli a@unstable.cc Link: https://lore.kernel.org/r/20211020200618.467342-1-ssuryaextr@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv6/addrconf.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index e47d5047d5373..178a3b26f9d2c 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2996,6 +2996,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
if (idev->dev->flags&IFF_POINTOPOINT) { + if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE) + return; + addr.s6_addr32[0] = htonl(0xfe800000); scope = IFA_LINK; plen = 64;
From: Arnd Bergmann arnd@arndb.de
[ Upstream commit 345dac33f58894a56d17b92a41be10e16585ceff ]
When configuring the kernel for big-endian, we set either BE-8 or BE-32 based on the CPU architecture level. Until linux-4.4, we did not have any ARMv7-M platform allowing big-endian builds, but now i.MX/Vybrid is in that category, adn we get a build error because of this:
arch/arm/kernel/module-plts.c: In function 'get_module_plt': arch/arm/kernel/module-plts.c:60:46: error: implicit declaration of function '__opcode_to_mem_thumb32' [-Werror=implicit-function-declaration]
This comes down to picking the wrong default, ARMv7-M uses BE8 like ARMv7-A does. Changing the default gets the kernel to compile and presumably works.
https://lore.kernel.org/all/1455804123-2526139-2-git-send-email-arnd@arndb.d...
Tested-by: Vladimir Murzin vladimir.murzin@arm.com Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm/mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 50e0b45a22dba..77fd4446b5fc8 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -757,7 +757,7 @@ config CPU_BIG_ENDIAN config CPU_ENDIAN_BE8 bool depends on CPU_BIG_ENDIAN - default CPU_V6 || CPU_V6K || CPU_V7 + default CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M help Support for the BE-8 (big-endian) mode on ARMv6 and ARMv7 processors.
From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit ca9b8f56ec089d3a436050afefd17b7237301f47 ]
Fix the missing clk_disable_unprepare() before return from bcm_qspi_probe() in the error handling case.
Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20211018073413.2029081-1-yangyingliang@huawei.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spi-bcm-qspi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c index 11adc2c13a74c..298b1dd463800 100644 --- a/drivers/spi/spi-bcm-qspi.c +++ b/drivers/spi/spi-bcm-qspi.c @@ -1301,7 +1301,7 @@ int bcm_qspi_probe(struct platform_device *pdev, &qspi->dev_ids[val]); if (ret < 0) { dev_err(&pdev->dev, "IRQ %s not found\n", name); - goto qspi_probe_err; + goto qspi_unprepare_err; }
qspi->dev_ids[val].dev = qspi; @@ -1316,7 +1316,7 @@ int bcm_qspi_probe(struct platform_device *pdev, if (!num_ints) { dev_err(&pdev->dev, "no IRQs registered, cannot init driver\n"); ret = -EINVAL; - goto qspi_probe_err; + goto qspi_unprepare_err; }
/* @@ -1367,6 +1367,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
qspi_reg_err: bcm_qspi_hw_uninit(qspi); +qspi_unprepare_err: clk_disable_unprepare(qspi->clk); qspi_probe_err: kfree(qspi->dev_ids);
From: Sven Schnelle svens@stackframe.org
[ Upstream commit 1030d681319b43869e0d5b568b9d0226652d1a6f ]
I've got the following splat after enabling preemption:
[ 3.724721] BUG: using __this_cpu_add() in preemptible [00000000] code: swapper/0/1 [ 3.734630] caller is __this_cpu_preempt_check+0x38/0x50 [ 3.740635] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc4-64bit+ #324 [ 3.744605] Hardware name: 9000/785/C8000 [ 3.744605] Backtrace: [ 3.744605] [<00000000401d9d58>] show_stack+0x74/0xb0 [ 3.744605] [<0000000040c27bd4>] dump_stack_lvl+0x10c/0x188 [ 3.744605] [<0000000040c27c84>] dump_stack+0x34/0x48 [ 3.744605] [<0000000040c33438>] check_preemption_disabled+0x178/0x1b0 [ 3.744605] [<0000000040c334f8>] __this_cpu_preempt_check+0x38/0x50 [ 3.744605] [<00000000401d632c>] flush_tlb_all+0x58/0x2e0 [ 3.744605] [<00000000401075c0>] 0x401075c0 [ 3.744605] [<000000004010b8fc>] 0x4010b8fc [ 3.744605] [<00000000401080fc>] 0x401080fc [ 3.744605] [<00000000401d5224>] do_one_initcall+0x128/0x378 [ 3.744605] [<0000000040102de8>] 0x40102de8 [ 3.744605] [<0000000040c33864>] kernel_init+0x60/0x3a8 [ 3.744605] [<00000000401d1020>] ret_from_kernel_thread+0x20/0x28 [ 3.744605]
Fix this by moving the __inc_irq_stat() into the locked section.
Signed-off-by: Sven Schnelle svens@stackframe.org Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/parisc/mm/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 8be075f81ce66..c8af5296cfd24 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -895,9 +895,9 @@ void flush_tlb_all(void) { int do_recycle;
- __inc_irq_stat(irq_tlb_count); do_recycle = 0; spin_lock(&sid_lock); + __inc_irq_stat(irq_tlb_count); if (dirty_space_ids > RECYCLE_THRESHOLD) { BUG_ON(recycle_inuse); /* FIXME: Use a semaphore/wait queue here */ get_dirty_sids(&recycle_ndirty,recycle_dirty_array); @@ -916,8 +916,8 @@ void flush_tlb_all(void) #else void flush_tlb_all(void) { - __inc_irq_stat(irq_tlb_count); spin_lock(&sid_lock); + __inc_irq_stat(irq_tlb_count); flush_tlb_all_local(NULL); recycle_sids(); spin_unlock(&sid_lock);
From: Helge Deller deller@gmx.de
[ Upstream commit 9cc2fa4f4a92ccc6760d764e7341be46ee8aaaa1 ]
The function end_of_stack() returns a pointer to the last entry of a stack. For architectures like parisc where the stack grows upwards return the pointer to the highest address in the stack.
Without this change I faced a crash on parisc, because the stackleak functionality wrote STACKLEAK_POISON to the lowest address and thus overwrote the first 4 bytes of the task_struct which included the TIF_FLAGS.
Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/sched/task_stack.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/include/linux/sched/task_stack.h b/include/linux/sched/task_stack.h index cb4828aaa34fd..3461beb89b040 100644 --- a/include/linux/sched/task_stack.h +++ b/include/linux/sched/task_stack.h @@ -25,7 +25,11 @@ static inline void *task_stack_page(const struct task_struct *task)
static inline unsigned long *end_of_stack(const struct task_struct *task) { +#ifdef CONFIG_STACK_GROWSUP + return (unsigned long *)((unsigned long)task->stack + THREAD_SIZE) - 1; +#else return task->stack; +#endif }
#elif !defined(__HAVE_THREAD_FUNCTIONS)
From: Sven Schnelle svens@stackframe.org
[ Upstream commit 66e29fcda1824f0427966fbee2bd2c85bf362c82 ]
With idle polling, IPIs are not sent when a CPU idle, but queued and run later from do_idle(). The default kgdb_call_nmi_hook() implementation gets the pointer to struct pt_regs from get_irq_reqs(), which doesn't work in that case because it was not called from the IPI interrupt handler. Fix it by defining our own kgdb_roundup() function which sents an IPI_ENTER_KGDB. When that IPI is received on the target CPU kgdb_nmicallback() is called.
Signed-off-by: Sven Schnelle svens@stackframe.org Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/parisc/kernel/smp.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index ab4d5580bb02b..45e3aadcecd2f 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -32,6 +32,7 @@ #include <linux/bitops.h> #include <linux/ftrace.h> #include <linux/cpu.h> +#include <linux/kgdb.h>
#include <linux/atomic.h> #include <asm/current.h> @@ -74,7 +75,10 @@ enum ipi_message_type { IPI_CALL_FUNC, IPI_CPU_START, IPI_CPU_STOP, - IPI_CPU_TEST + IPI_CPU_TEST, +#ifdef CONFIG_KGDB + IPI_ENTER_KGDB, +#endif };
@@ -170,7 +174,12 @@ ipi_interrupt(int irq, void *dev_id) case IPI_CPU_TEST: smp_debug(100, KERN_DEBUG "CPU%d is alive!\n", this_cpu); break; - +#ifdef CONFIG_KGDB + case IPI_ENTER_KGDB: + smp_debug(100, KERN_DEBUG "CPU%d ENTER_KGDB\n", this_cpu); + kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs()); + break; +#endif default: printk(KERN_CRIT "Unknown IPI num on CPU%d: %lu\n", this_cpu, which); @@ -226,6 +235,12 @@ send_IPI_allbutself(enum ipi_message_type op) } }
+#ifdef CONFIG_KGDB +void kgdb_roundup_cpus(void) +{ + send_IPI_allbutself(IPI_ENTER_KGDB); +} +#endif
inline void smp_send_stop(void) { send_IPI_allbutself(IPI_CPU_STOP); }
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-
Brian Norris -
Sasha Levin