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[PATCH v4] usb: dwc3: gadget: check that event count does not exceed event buffer length

by Frode Isaksen

From: Frode Isaksen <frode(a)meta.com> The event count is read from register DWC3_GEVNTCOUNT. There is a check for the count being zero, but not for exceeding the event buffer length. Check that event count does not exceed event buffer length, avoiding an out-of-bounds access when memcpy'ing the event. Crash log: Unable to handle kernel paging request at virtual address ffffffc0129be000 pc : __memcpy+0x114/0x180 lr : dwc3_check_event_buf+0xec/0x348 x3 : 0000000000000030 x2 : 000000000000dfc4 x1 : ffffffc0129be000 x0 : ffffff87aad60080 Call trace: __memcpy+0x114/0x180 dwc3_interrupt+0x24/0x34 Signed-off-by: Frode Isaksen <frode(a)meta.com> Fixes: ebbb2d59398f ("usb: dwc3: gadget: use evt->cache for processing events") Cc: stable(a)vger.kernel.org --- v1 -> v2: Added Fixes and Cc tag. v2 -> v3: Added error log v3 -> v4: Rate limit error log drivers/usb/dwc3/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 89a4dc8ebf94..b75b4c5ca7fc 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4564,6 +4564,12 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) if (!count) return IRQ_NONE; + if (count > evt->length) { + dev_err_ratelimited(dwc->dev, "invalid count(%u) > evt->length(%u)\n", + count, evt->length); + return IRQ_NONE; + } + evt->count = count; evt->flags |= DWC3_EVENT_PENDING; -- 2.49.0

3 months

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[PATCH v2] usb: dwc3: gadget: check that event count does not exceed event buffer length

by Frode Isaksen

From: Frode Isaksen <frode(a)meta.com> The event count is read from register DWC3_GEVNTCOUNT. There is a check for the count being zero, but not for exceeding the event buffer length. Check that event count does not exceed event buffer length, avoiding an out-of-bounds access when memcpy'ing the event. Crash log: Unable to handle kernel paging request at virtual address ffffffc0129be000 pc : __memcpy+0x114/0x180 lr : dwc3_check_event_buf+0xec/0x348 x3 : 0000000000000030 x2 : 000000000000dfc4 x1 : ffffffc0129be000 x0 : ffffff87aad60080 Call trace: __memcpy+0x114/0x180 dwc3_interrupt+0x24/0x34 Signed-off-by: Frode Isaksen <frode(a)meta.com> Fixes: ebbb2d59398f ("usb: dwc3: gadget: use evt->cache for processing events") Cc: stable(a)vger.kernel.org --- v1 -> v2: Added Fixes and Cc tag. This bug was discovered, tested and fixed (no more crashes seen) on Meta Quest 3 device. Also tested on T.I. AM62x board. drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 63fef4a1a498..548e112167f3 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4564,7 +4564,7 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0)); count &= DWC3_GEVNTCOUNT_MASK; - if (!count) + if (!count || count > evt->length) return IRQ_NONE; evt->count = count; -- 2.48.1

3 months

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[PATCH 5.15.y] smb: client: fix use-after-free bug in cifs_debug_data_proc_show()

by Xiangyu Chen

From: Paulo Alcantara <pc(a)manguebit.com> commit d328c09ee9f15ee5a26431f5aad7c9239fa85e62 upstream. Skip SMB sessions that are being teared down (e.g. @ses->ses_status == SES_EXITING) in cifs_debug_data_proc_show() to avoid use-after-free in @ses. This fixes the following GPF when reading from /proc/fs/cifs/DebugData while mounting and umounting [ 816.251274] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI ... [ 816.260138] Call Trace: [ 816.260329] <TASK> [ 816.260499] ? die_addr+0x36/0x90 [ 816.260762] ? exc_general_protection+0x1b3/0x410 [ 816.261126] ? asm_exc_general_protection+0x26/0x30 [ 816.261502] ? cifs_debug_tcon+0xbd/0x240 [cifs] [ 816.261878] ? cifs_debug_tcon+0xab/0x240 [cifs] [ 816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [ 816.262689] ? seq_read_iter+0x379/0x470 [ 816.262995] seq_read_iter+0x118/0x470 [ 816.263291] proc_reg_read_iter+0x53/0x90 [ 816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.264750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 816.265135] RIP: 0033:0x7fd5e669d381 Cc: stable(a)vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) <pc(a)manguebit.com> Signed-off-by: Steve French <stfrench(a)microsoft.com> [ This patch removed lock/unlock operation due to ses_lock is not present in v5.15 and not ported yet. ses->status is protected by a global lock, cifs_tcp_ses_lock, in v5.15. ] Signed-off-by: Xiangyu Chen <xiangyu.chen(a)windriver.com> Signed-off-by: He Zhe <zhe.he(a)windriver.com> --- Verified build test. --- fs/cifs/cifs_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index e7501533c2ec..c90f51c12fb0 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -380,6 +380,8 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v) list_for_each(tmp2, &server->smb_ses_list) { ses = list_entry(tmp2, struct cifs_ses, smb_ses_list); + if (ses->status == CifsExiting) + continue; i++; if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) || -- 2.43.0

3 months

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[PATCH 5.10.y] smb: client: fix use-after-free bug in cifs_debug_data_proc_show()

by Xiangyu Chen

From: Paulo Alcantara <pc(a)manguebit.com> commit d328c09ee9f15ee5a26431f5aad7c9239fa85e62 upstream. Skip SMB sessions that are being teared down (e.g. @ses->ses_status == SES_EXITING) in cifs_debug_data_proc_show() to avoid use-after-free in @ses. This fixes the following GPF when reading from /proc/fs/cifs/DebugData while mounting and umounting [ 816.251274] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6d81: 0000 [#1] PREEMPT SMP NOPTI ... [ 816.260138] Call Trace: [ 816.260329] <TASK> [ 816.260499] ? die_addr+0x36/0x90 [ 816.260762] ? exc_general_protection+0x1b3/0x410 [ 816.261126] ? asm_exc_general_protection+0x26/0x30 [ 816.261502] ? cifs_debug_tcon+0xbd/0x240 [cifs] [ 816.261878] ? cifs_debug_tcon+0xab/0x240 [cifs] [ 816.262249] cifs_debug_data_proc_show+0x516/0xdb0 [cifs] [ 816.262689] ? seq_read_iter+0x379/0x470 [ 816.262995] seq_read_iter+0x118/0x470 [ 816.263291] proc_reg_read_iter+0x53/0x90 [ 816.263596] ? srso_alias_return_thunk+0x5/0x7f [ 816.263945] vfs_read+0x201/0x350 [ 816.264211] ksys_read+0x75/0x100 [ 816.264472] do_syscall_64+0x3f/0x90 [ 816.264750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 816.265135] RIP: 0033:0x7fd5e669d381 Cc: stable(a)vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) <pc(a)manguebit.com> Signed-off-by: Steve French <stfrench(a)microsoft.com> [ This patch removed lock/unlock operation due to ses_lock is not present in v5.10 and not ported yet. ses->status is protected by a global lock, cifs_tcp_ses_lock, in v5.10. ] Signed-off-by: Xiangyu Chen <xiangyu.chen(a)windriver.com> Signed-off-by: He Zhe <zhe.he(a)windriver.com> --- Verified the build test. --- fs/cifs/cifs_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 53588d7517b4..5ec4788341c2 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -356,6 +356,8 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v) list_for_each(tmp2, &server->smb_ses_list) { ses = list_entry(tmp2, struct cifs_ses, smb_ses_list); + if (ses->status == CifsExiting) + continue; if ((ses->serverDomain == NULL) || (ses->serverOS == NULL) || (ses->serverNOS == NULL)) { -- 2.43.0

3 months

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[PATCH 5.10.y] i2c: dev: check return value when calling dev_set_name()

by Feng Liu

From: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> [ Upstream commit 993eb48fa199b5f476df8204e652eff63dd19361 ] If dev_set_name() fails, the dev_name() is null, check the return value of dev_set_name() to avoid the null-ptr-deref. Fixes: 1413ef638aba ("i2c: dev: Fix the race between the release of i2c_dev and cdev") Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Signed-off-by: Wolfram Sang <wsa(a)kernel.org> Signed-off-by: Feng Liu <Feng.Liu3(a)windriver.com> Signed-off-by: He Zhe <Zhe.He(a)windriver.com> --- Verified the build test. --- drivers/i2c/i2c-dev.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index dafad891998e..f0bd4ae19df6 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -669,17 +669,22 @@ static int i2cdev_attach_adapter(struct device *dev, void *dummy) i2c_dev->dev.class = i2c_dev_class; i2c_dev->dev.parent = &adap->dev; i2c_dev->dev.release = i2cdev_dev_release; - dev_set_name(&i2c_dev->dev, "i2c-%d", adap->nr); + + res = dev_set_name(&i2c_dev->dev, "i2c-%d", adap->nr); + if (res) + goto err_put_i2c_dev; res = cdev_device_add(&i2c_dev->cdev, &i2c_dev->dev); - if (res) { - put_i2c_dev(i2c_dev, false); - return res; - } + if (res) + goto err_put_i2c_dev; pr_debug("i2c-dev: adapter [%s] registered as minor %d\n", adap->name, adap->nr); return 0; + +err_put_i2c_dev: + put_i2c_dev(i2c_dev, false); + return res; } static int i2cdev_detach_adapter(struct device *dev, void *dummy) -- 2.34.1

3 months

2
1
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[PATCH 5.10.y] bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers

by Cliff Liu

From: Hou Tao <houtao1(a)huawei.com> [ Upstream commit 169410eba271afc9f0fb476d996795aa26770c6d ] These three bpf_map_{lookup,update,delete}_elem() helpers are also available for sleepable bpf program, so add the corresponding lock assertion for sleepable bpf program, otherwise the following warning will be reported when a sleepable bpf program manipulates bpf map under interpreter mode (aka bpf_jit_enable=0): WARNING: CPU: 3 PID: 4985 at kernel/bpf/helpers.c:40 ...... CPU: 3 PID: 4985 Comm: test_progs Not tainted 6.6.0+ #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ...... RIP: 0010:bpf_map_lookup_elem+0x54/0x60 ...... Call Trace: <TASK> ? __warn+0xa5/0x240 ? bpf_map_lookup_elem+0x54/0x60 ? report_bug+0x1ba/0x1f0 ? handle_bug+0x40/0x80 ? exc_invalid_op+0x18/0x50 ? asm_exc_invalid_op+0x1b/0x20 ? __pfx_bpf_map_lookup_elem+0x10/0x10 ? rcu_lockdep_current_cpu_online+0x65/0xb0 ? rcu_is_watching+0x23/0x50 ? bpf_map_lookup_elem+0x54/0x60 ? __pfx_bpf_map_lookup_elem+0x10/0x10 ___bpf_prog_run+0x513/0x3b70 __bpf_prog_run32+0x9d/0xd0 ? __bpf_prog_enter_sleepable_recur+0xad/0x120 ? __bpf_prog_enter_sleepable_recur+0x3e/0x120 bpf_trampoline_6442580665+0x4d/0x1000 __x64_sys_getpgid+0x5/0x30 ? do_syscall_64+0x36/0xb0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 </TASK> Signed-off-by: Hou Tao <houtao1(a)huawei.com> Link: https://lore.kernel.org/r/20231204140425.1480317-2-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> [Minor conflict resolved due to code context change.] Signed-off-by: Cliff Liu <donghua.liu(a)windriver.com> Signed-off-by: He Zhe <Zhe.He(a)windriver.com> --- Verified the build test. --- kernel/bpf/helpers.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 31e3a5482156..238a51daefa4 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -3,6 +3,7 @@ */ #include <linux/bpf.h> #include <linux/rcupdate.h> +#include <linux/rcupdate_trace.h> #include <linux/random.h> #include <linux/smp.h> #include <linux/topology.h> @@ -24,12 +25,12 @@ * * Different map implementations will rely on rcu in map methods * lookup/update/delete, therefore eBPF programs must run under rcu lock - * if program is allowed to access maps, so check rcu_read_lock_held in - * all three functions. + * if program is allowed to access maps, so check rcu_read_lock_held() or + * rcu_read_lock_trace_held() in all three functions. */ BPF_CALL_2(bpf_map_lookup_elem, struct bpf_map *, map, void *, key) { - WARN_ON_ONCE(!rcu_read_lock_held()); + WARN_ON_ONCE(!rcu_read_lock_held() && !rcu_read_lock_trace_held()); return (unsigned long) map->ops->map_lookup_elem(map, key); } @@ -45,7 +46,7 @@ const struct bpf_func_proto bpf_map_lookup_elem_proto = { BPF_CALL_4(bpf_map_update_elem, struct bpf_map *, map, void *, key, void *, value, u64, flags) { - WARN_ON_ONCE(!rcu_read_lock_held()); + WARN_ON_ONCE(!rcu_read_lock_held() && !rcu_read_lock_trace_held()); return map->ops->map_update_elem(map, key, value, flags); } @@ -62,7 +63,7 @@ const struct bpf_func_proto bpf_map_update_elem_proto = { BPF_CALL_2(bpf_map_delete_elem, struct bpf_map *, map, void *, key) { - WARN_ON_ONCE(!rcu_read_lock_held()); + WARN_ON_ONCE(!rcu_read_lock_held() && !rcu_read_lock_trace_held()); return map->ops->map_delete_elem(map, key); } -- 2.34.1

3 months

2
1
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[PATCH v2 2/2] Revert "smb: client: fix TCP timers deadlock after rmmod"

by Kuniyuki Iwashima

This reverts commit e9f2517a3e18a54a3943c098d2226b245d488801. Commit e9f2517a3e18 ("smb: client: fix TCP timers deadlock after rmmod") is intended to fix a null-ptr-deref in LOCKDEP, which is mentioned as CVE-2024-54680, but is actually did not fix anything; The issue can be reproduced on top of it. [0] Also, it reverted the change by commit ef7134c7fc48 ("smb: client: Fix use-after-free of network namespace.") and introduced a real issue by reviving the kernel TCP socket. When a reconnect happens for a CIFS connection, the socket state transitions to FIN_WAIT_1. Then, inet_csk_clear_xmit_timers_sync() in tcp_close() stops all timers for the socket. If an incoming FIN packet is lost, the socket will stay at FIN_WAIT_1 forever, and such sockets could be leaked up to net.ipv4.tcp_max_orphans. Usually, FIN can be retransmitted by the peer, but if the peer aborts the connection, the issue comes into reality. I warned about this privately by pointing out the exact report [1], but the bogus fix was finally merged. So, we should not stop the timers to finally kill the connection on our side in that case, meaning we must not use a kernel socket for TCP whose sk->sk_net_refcnt is 0. The kernel socket does not have a reference to its netns to make it possible to tear down netns without cleaning up every resource in it. For example, tunnel devices use a UDP socket internally, but we can destroy netns without removing such devices and let it complete during exit. Otherwise, netns would be leaked when the last application died. However, this is problematic for TCP sockets because TCP has timers to close the connection gracefully even after the socket is close()d. The lifetime of the socket and its netns is different from the lifetime of the underlying connection. If the socket user does not maintain the netns lifetime, the timer could be fired after the socket is close()d and its netns is freed up, resulting in use-after-free. Actually, we have seen so many similar issues and converted such sockets to have a reference to netns. That's why I converted the CIFS client socket to have a reference to netns (sk->sk_net_refcnt == 1), which is somehow mentioned as out-of-scope of CIFS and technically wrong in e9f2517a3e18, but **is in-scope and right fix**. Regarding the LOCKDEP issue, we can prevent the module unload by bumping the module refcount when switching the LOCKDDEP key in sock_lock_init_class_and_name(). [2] For a while, let's revert the bogus fix. Note that now we can use sk_net_refcnt_upgrade() for the socket conversion, but I'll do so later separately to make backport easy. Link: https://lore.kernel.org/all/20250402020807.28583-1-kuniyu@amazon.com/ #[0] Link: https://lore.kernel.org/netdev/c08bd5378da647a2a4c16698125d180a@huawei.com/ #[1] Link: https://lore.kernel.org/lkml/20250402005841.19846-1-kuniyu@amazon.com/ #[2] Fixes: e9f2517a3e18 ("smb: client: fix TCP timers deadlock after rmmod") Signed-off-by: Kuniyuki Iwashima <kuniyu(a)amazon.com> Cc: stable(a)vger.kernel.org --- fs/smb/client/connect.c | 36 ++++++++++-------------------------- 1 file changed, 10 insertions(+), 26 deletions(-) diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index 137a611c5ab0..989d8808260b 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -1073,13 +1073,9 @@ clean_demultiplex_info(struct TCP_Server_Info *server) msleep(125); if (cifs_rdma_enabled(server)) smbd_destroy(server); - if (server->ssocket) { sock_release(server->ssocket); server->ssocket = NULL; - - /* Release netns reference for the socket. */ - put_net(cifs_net_ns(server)); } if (!list_empty(&server->pending_mid_q)) { @@ -1127,7 +1123,6 @@ clean_demultiplex_info(struct TCP_Server_Info *server) */ } - /* Release netns reference for this server. */ put_net(cifs_net_ns(server)); kfree(server->leaf_fullpath); kfree(server->hostname); @@ -1773,8 +1768,6 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx, tcp_ses->ops = ctx->ops; tcp_ses->vals = ctx->vals; - - /* Grab netns reference for this server. */ cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); tcp_ses->sign = ctx->sign; @@ -1902,7 +1895,6 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx, out_err_crypto_release: cifs_crypto_secmech_release(tcp_ses); - /* Release netns reference for this server. */ put_net(cifs_net_ns(tcp_ses)); out_err: @@ -1911,10 +1903,8 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx, cifs_put_tcp_session(tcp_ses->primary_server, false); kfree(tcp_ses->hostname); kfree(tcp_ses->leaf_fullpath); - if (tcp_ses->ssocket) { + if (tcp_ses->ssocket) sock_release(tcp_ses->ssocket); - put_net(cifs_net_ns(tcp_ses)); - } kfree(tcp_ses); } return ERR_PTR(rc); @@ -3356,20 +3346,20 @@ generic_ip_connect(struct TCP_Server_Info *server) socket = server->ssocket; } else { struct net *net = cifs_net_ns(server); + struct sock *sk; - rc = sock_create_kern(net, sfamily, SOCK_STREAM, IPPROTO_TCP, &server->ssocket); + rc = __sock_create(net, sfamily, SOCK_STREAM, + IPPROTO_TCP, &server->ssocket, 1); if (rc < 0) { cifs_server_dbg(VFS, "Error %d creating socket\n", rc); return rc; } - /* - * Grab netns reference for the socket. - * - * It'll be released here, on error, or in clean_demultiplex_info() upon server - * teardown. - */ - get_net(net); + sk = server->ssocket->sk; + __netns_tracker_free(net, &sk->ns_tracker, false); + sk->sk_net_refcnt = 1; + get_net_track(net, &sk->ns_tracker, GFP_KERNEL); + sock_inuse_add(net, 1); /* BB other socket options to set KEEPALIVE, NODELAY? */ cifs_dbg(FYI, "Socket created\n"); @@ -3383,10 +3373,8 @@ generic_ip_connect(struct TCP_Server_Info *server) } rc = bind_socket(server); - if (rc < 0) { - put_net(cifs_net_ns(server)); + if (rc < 0) return rc; - } /* * Eventually check for other socket options to change from @@ -3423,7 +3411,6 @@ generic_ip_connect(struct TCP_Server_Info *server) if (rc < 0) { cifs_dbg(FYI, "Error %d connecting to server\n", rc); trace_smb3_connect_err(server->hostname, server->conn_id, &server->dstaddr, rc); - put_net(cifs_net_ns(server)); sock_release(socket); server->ssocket = NULL; return rc; @@ -3441,9 +3428,6 @@ generic_ip_connect(struct TCP_Server_Info *server) (server->rfc1001_sessinit == -1 && sport == htons(RFC1001_PORT))) rc = ip_rfc1001_connect(server); - if (rc < 0) - put_net(cifs_net_ns(server)); - return rc; } -- 2.48.1

3 months

1
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[PATCH v2 1/2] Revert "smb: client: Fix netns refcount imbalance causing leaks and use-after-free"

by Kuniyuki Iwashima

This reverts commit 4e7f1644f2ac6d01dc584f6301c3b1d5aac4eaef. The commit e9f2517a3e18 ("smb: client: fix TCP timers deadlock after rmmod") is not only a bogus fix for LOCKDEP null-ptr-deref but also introduces a real issue, TCP sockets leak, which will be explained in detail in the next revert. Also, CNA assigned CVE-2024-54680 to it but is rejecting it. [0] Thus, we are reverting the commit and its follow-up commit 4e7f1644f2ac ("smb: client: Fix netns refcount imbalance causing leaks and use-after-free"). Link: https://lore.kernel.org/all/2025040248-tummy-smilingly-4240@gregkh/ #[0] Fixes: 4e7f1644f2ac ("smb: client: Fix netns refcount imbalance causing leaks and use-after-free") Signed-off-by: Kuniyuki Iwashima <kuniyu(a)amazon.com> Cc: stable(a)vger.kernel.org --- fs/smb/client/connect.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c index 10a7c28d2d44..137a611c5ab0 100644 --- a/fs/smb/client/connect.c +++ b/fs/smb/client/connect.c @@ -300,7 +300,6 @@ cifs_abort_connection(struct TCP_Server_Info *server) server->ssocket->flags); sock_release(server->ssocket); server->ssocket = NULL; - put_net(cifs_net_ns(server)); } server->sequence_number = 0; server->session_estab = false; @@ -3367,12 +3366,8 @@ generic_ip_connect(struct TCP_Server_Info *server) /* * Grab netns reference for the socket. * - * This reference will be released in several situations: - * - In the failure path before the cifsd thread is started. - * - In the all place where server->socket is released, it is - * also set to NULL. - * - Ultimately in clean_demultiplex_info(), during the final - * teardown. + * It'll be released here, on error, or in clean_demultiplex_info() upon server + * teardown. */ get_net(net); @@ -3388,8 +3383,10 @@ generic_ip_connect(struct TCP_Server_Info *server) } rc = bind_socket(server); - if (rc < 0) + if (rc < 0) { + put_net(cifs_net_ns(server)); return rc; + } /* * Eventually check for other socket options to change from @@ -3444,6 +3441,9 @@ generic_ip_connect(struct TCP_Server_Info *server) (server->rfc1001_sessinit == -1 && sport == htons(RFC1001_PORT))) rc = ip_rfc1001_connect(server); + if (rc < 0) + put_net(cifs_net_ns(server)); + return rc; } -- 2.48.1

3 months

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[PATCH net 1/5] igc: Fix XSK queue NAPI ID mapping

by Tony Nguyen

From: Joe Damato <jdamato(a)fastly.com> In commit b65969856d4f ("igc: Link queues to NAPI instances"), the XSK queues were incorrectly unmapped from their NAPI instances. After discussion on the mailing list and the introduction of a test to codify the expected behavior, we can see that the unmapping causes the check_xsk test to fail: NETIF=enp86s0 ./tools/testing/selftests/drivers/net/queues.py [...] # Check| ksft_eq(q.get('xsk', None), {}, # Check failed None != {} xsk attr on queue we configured not ok 4 queues.check_xsk After this commit, the test passes: ok 4 queues.check_xsk Note that the test itself is only in net-next, so I tested this change by applying it to my local net-next tree, booting, and running the test. Cc: stable(a)vger.kernel.org Fixes: b65969856d4f ("igc: Link queues to NAPI instances") Signed-off-by: Joe Damato <jdamato(a)fastly.com> Reviewed-by: Gerhard Engleder <gerhard(a)engleder-embedded.com> Tested-by: Mor Bar-Gabay <morx.bar.gabay(a)intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen(a)intel.com> --- drivers/net/ethernet/intel/igc/igc.h | 2 -- drivers/net/ethernet/intel/igc/igc_main.c | 4 ++-- drivers/net/ethernet/intel/igc/igc_xdp.c | 2 -- 3 files changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index cd1d7b6c1782..c35cc5cb1185 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -337,8 +337,6 @@ struct igc_adapter { struct igc_led_classdev *leds; }; -void igc_set_queue_napi(struct igc_adapter *adapter, int q_idx, - struct napi_struct *napi); void igc_up(struct igc_adapter *adapter); void igc_down(struct igc_adapter *adapter); int igc_open(struct net_device *netdev); diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 491d942cefca..27c99ff59ed4 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -5022,8 +5022,8 @@ static int igc_sw_init(struct igc_adapter *adapter) return 0; } -void igc_set_queue_napi(struct igc_adapter *adapter, int vector, - struct napi_struct *napi) +static void igc_set_queue_napi(struct igc_adapter *adapter, int vector, + struct napi_struct *napi) { struct igc_q_vector *q_vector = adapter->q_vector[vector]; diff --git a/drivers/net/ethernet/intel/igc/igc_xdp.c b/drivers/net/ethernet/intel/igc/igc_xdp.c index c538e6b18aad..9eb47b4beb06 100644 --- a/drivers/net/ethernet/intel/igc/igc_xdp.c +++ b/drivers/net/ethernet/intel/igc/igc_xdp.c @@ -97,7 +97,6 @@ static int igc_xdp_enable_pool(struct igc_adapter *adapter, napi_disable(napi); } - igc_set_queue_napi(adapter, queue_id, NULL); set_bit(IGC_RING_FLAG_AF_XDP_ZC, &rx_ring->flags); set_bit(IGC_RING_FLAG_AF_XDP_ZC, &tx_ring->flags); @@ -147,7 +146,6 @@ static int igc_xdp_disable_pool(struct igc_adapter *adapter, u16 queue_id) xsk_pool_dma_unmap(pool, IGC_RX_DMA_ATTR); clear_bit(IGC_RING_FLAG_AF_XDP_ZC, &rx_ring->flags); clear_bit(IGC_RING_FLAG_AF_XDP_ZC, &tx_ring->flags); - igc_set_queue_napi(adapter, queue_id, napi); if (needs_reset) { napi_enable(napi); -- 2.47.1

3 months

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[PATCH 08/16] drm/amd/display: Add HP Elitebook 645 to the quirk list for eDP on DP1

by Roman.Li＠amd.com

From: Mario Limonciello <mario.limonciello(a)amd.com> [Why] HP Elitebook 645 has DP0 and DP1 swapped. [How] Add HP Elitebook 645 to DP0/DP1 swap quirk list. Cc: stable(a)vger.kernel.org Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3701 Reviewed-by: Alex Hung <alex.hung(a)amd.com> Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com> Signed-off-by: Roman Li <roman.li(a)amd.com> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index b2bb2f92db00..8665bd3cb75a 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1760,6 +1760,13 @@ static const struct dmi_system_id dmi_quirk_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite mt645 G8 Mobile Thin Client"), }, }, + { + .callback = edp0_on_dp1_callback, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "HP"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 645 14 inch G11 Notebook PC"), + }, + }, { .callback = edp0_on_dp1_callback, .matches = { -- 2.34.1

3 months

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