February 2025 - Linux-stable-mirror

[net-next] wifi: mt76: mt7921: fix kernel panic due to null pointer dereference

by Mingyen Hsieh

From: Ming Yen Hsieh <mingyen.hsieh(a)mediatek.com> This patch addresses a kernel panic caused by a null pointer dereference in the `mt792x_rx_get_wcid` function. The issue arises because the `deflink` structure is not properly initialized with the `sta` context. This patch ensures that the `deflink` structure is correctly linked to the `sta` context, preventing the null pointer dereference. [ 32.098574] BUG: kernel NULL pointer dereference, address: 0000000000000400 [ 32.098620] #PF: supervisor read access in kernel mode [ 32.098634] #PF: error_code(0x0000) - not-present page [ 32.098647] PGD 0 P4D 0 [ 32.098665] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI [ 32.098683] CPU: 0 UID: 0 PID: 470 Comm: mt76-usb-rx phy Not tainted 6.12.13-gentoo-dist #1 [ 32.098703] Hardware name: /AMD HUDSON-M1, BIOS 4.6.4 11/15/2011 [ 32.098717] RIP: 0010:mt792x_rx_get_wcid+0x48/0x140 [mt792x_lib] [ 32.098776] RSP: 0018:ffffa147c055fd98 EFLAGS: 00010202 [ 32.098792] RAX: 0000000000000000 RBX: ffff8e9ecb652000 RCX: 0000000000000000 [ 32.098806] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8e9ecb652000 [ 32.098819] RBP: 0000000000000685 R08: ffff8e9ec6570000 R09: 0000000000000000 [ 32.098832] R10: ffff8e9ecd2ca000 R11: ffff8e9f22a217c0 R12: 0000000038010119 [ 32.098845] R13: 0000000080843801 R14: ffff8e9ec6570000 R15: ffff8e9ecb652000 [ 32.098860] FS: 0000000000000000(0000) GS:ffff8e9f22a00000(0000) knlGS:0000000000000000 [ 32.098876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.098889] CR2: 0000000000000400 CR3: 000000000d2ea000 CR4: 00000000000006f0 [ 32.098903] Call Trace: [ 32.098918] <TASK> [ 32.098932] ? __die_body.cold+0x19/0x27 [ 32.098955] ? page_fault_oops+0x15a/0x2f0 [ 32.098975] ? search_module_extables+0x19/0x60 [ 32.098995] ? search_bpf_extables+0x5f/0x80 [ 32.099012] ? exc_page_fault+0x7e/0x180 [ 32.099030] ? asm_exc_page_fault+0x26/0x30 [ 32.099054] ? mt792x_rx_get_wcid+0x48/0x140 [mt792x_lib] [ 32.099084] mt7921_queue_rx_skb+0x1c6/0xaa0 [mt7921_common] [ 32.099114] mt76u_alloc_queues+0x784/0x810 [mt76_usb] [ 32.099140] ? __pfx___mt76_worker_fn+0x10/0x10 [mt76] [ 32.099172] __mt76_worker_fn+0x4f/0x80 [mt76] [ 32.099203] kthread+0xd2/0x100 [ 32.099221] ? __pfx_kthread+0x10/0x10 [ 32.099237] ret_from_fork+0x34/0x50 [ 32.099254] ? __pfx_kthread+0x10/0x10 [ 32.099269] ret_from_fork_asm+0x1a/0x30 [ 32.099290] </TASK> [ 32.099719] ---[ end trace 0000000000000000 ]--- Reported-by: Salah Coronya <salah.coronya(a)gmail.com> Closes: https://github.com/morrownr/USB-WiFi/issues/577 Cc: stable(a)vger.kernel.org Fixes: 90c10286b176 ("wifi: mt76: mt7925: Update mt792x_rx_get_wcid for per-link STA") Signed-off-by: Ming Yen Hsieh <mingyen.hsieh(a)mediatek.com> Tested-by: Nick Morrow <usbwifi2024(a)gmail.com> Tested-by: Salah Coronya <salah.coronya(a)gmail.com> --- drivers/net/wireless/mediatek/mt76/mt7921/main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c index 13e58c328aff..78b77a54d195 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c @@ -811,6 +811,7 @@ int mt7921_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif, msta->deflink.wcid.phy_idx = mvif->bss_conf.mt76.band_idx; msta->deflink.wcid.tx_info |= MT_WCID_TX_INFO_SET; msta->deflink.last_txs = jiffies; + msta->deflink.sta = msta; ret = mt76_connac_pm_wake(&dev->mphy, &dev->pm); if (ret) -- 2.45.2

2 weeks, 5 days

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+ selftests-damon-damos_quota_goal-handle-minimum-quota-that-cannot-be-further-reduced.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: selftests/damon/damos_quota_goal: handle minimum quota that cannot be further reduced has been added to the -mm mm-hotfixes-unstable branch. Its filename is selftests-damon-damos_quota_goal-handle-minimum-quota-that-cannot-be-further-reduced.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: selftests/damon/damos_quota_goal: handle minimum quota that cannot be further reduced Date: Mon, 17 Feb 2025 10:23:04 -0800 damos_quota_goal.py selftest see if DAMOS quota goals tuning feature increases or reduces the effective size quota for given score as expected. The tuning feature sets the minimum quota size as one byte, so if the effective size quota is already one, we cannot expect it further be reduced. However the test is not aware of the edge case, and fails since it shown no expected change of the effective quota. Handle the case by updating the failure logic for no change to see if it was the case, and simply skips to next test input. Link: https://lkml.kernel.org/r/20250217182304.45215-1-sj@kernel.org Fixes: f1c07c0a1662b ("selftests/damon: add a test for DAMOS quota goal") Signed-off-by: SeongJae Park <sj(a)kernel.org> Reported-by: kernel test robot <oliver.sang(a)intel.com> Closes: https://lore.kernel.org/oe-lkp/202502171423.b28a918d-lkp@intel.com Cc: Shuah Khan (Samsung OSG) <shuah(a)kernel.org> Cc: <stable(a)vger.kernel.org> [6.10.x] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- tools/testing/selftests/damon/damos_quota_goal.py | 3 +++ 1 file changed, 3 insertions(+) --- a/tools/testing/selftests/damon/damos_quota_goal.py~selftests-damon-damos_quota_goal-handle-minimum-quota-that-cannot-be-further-reduced +++ a/tools/testing/selftests/damon/damos_quota_goal.py @@ -63,6 +63,9 @@ def main(): if last_effective_bytes != 0 else -1.0)) if last_effective_bytes == goal.effective_bytes: + # effective quota was already minimum that cannot be more reduced + if expect_increase is False and last_effective_bytes == 1: + continue print('efective bytes not changed: %d' % goal.effective_bytes) exit(1) _ Patches currently in -mm which might be from sj(a)kernel.org are selftests-damon-damos_quota_goal-handle-minimum-quota-that-cannot-be-further-reduced.patch mm-madvise-split-out-mmap-locking-operations-for-madvise.patch mm-madvise-split-out-madvise-input-validity-check.patch mm-madvise-split-out-madvise-behavior-execution.patch mm-madvise-remove-redundant-mmap_lock-operations-from-process_madvise.patch mm-damon-avoid-applying-damos-action-to-same-entity-multiple-times.patch mm-damon-core-unset-damos-walk_completed-after-confimed-set.patch mm-damon-core-do-not-call-damos_walk_control-walk-if-walk-is-completed.patch mm-damon-core-do-damos-walking-in-entire-regions-granularity.patch

2 weeks, 5 days

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[PATCH 6.1.y] drm/amd/display: Add NULL pointer check for kzalloc

by jetlan9＠163.com

From: Hersen Wu <hersenxs.wu(a)amd.com> commit 8e65a1b7118acf6af96449e1e66b7adbc9396912 upstream. [Why & How] Check return pointer of kzalloc before using it. Reviewed-by: Alex Hung <alex.hung(a)amd.com> Acked-by: Wayne Lin <wayne.lin(a)amd.com> Signed-off-by: Hersen Wu <hersenxs.wu(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Wenshan Lan <jetlan9(a)163.com> --- .../gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c | 8 ++++++++ .../gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c | 8 ++++++++ drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c | 3 +++ drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c | 5 +++++ drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 5 +++++ drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c | 2 ++ drivers/gpu/drm/amd/display/dc/dcn316/dcn316_resource.c | 2 ++ drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c | 5 +++++ drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c | 2 ++ 9 files changed, 40 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c index 3ce0ee0d012f..367b163537c4 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c @@ -568,11 +568,19 @@ void dcn3_clk_mgr_construct( dce_clock_read_ss_info(clk_mgr); clk_mgr->base.bw_params = kzalloc(sizeof(*clk_mgr->base.bw_params), GFP_KERNEL); + if (!clk_mgr->base.bw_params) { + BREAK_TO_DEBUGGER(); + return; + } /* need physical address of table to give to PMFW */ clk_mgr->wm_range_table = dm_helpers_allocate_gpu_mem(clk_mgr->base.ctx, DC_MEM_ALLOC_TYPE_GART, sizeof(WatermarksExternal_t), &clk_mgr->wm_range_table_addr); + if (!clk_mgr->wm_range_table) { + BREAK_TO_DEBUGGER(); + return; + } } void dcn3_clk_mgr_destroy(struct clk_mgr_internal *clk_mgr) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c index 1d84a04acb3f..3ade764d3323 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c @@ -816,11 +816,19 @@ void dcn32_clk_mgr_construct( clk_mgr->smu_present = false; clk_mgr->base.bw_params = kzalloc(sizeof(*clk_mgr->base.bw_params), GFP_KERNEL); + if (!clk_mgr->base.bw_params) { + BREAK_TO_DEBUGGER(); + return; + } /* need physical address of table to give to PMFW */ clk_mgr->wm_range_table = dm_helpers_allocate_gpu_mem(clk_mgr->base.ctx, DC_MEM_ALLOC_TYPE_GART, sizeof(WatermarksExternal_t), &clk_mgr->wm_range_table_addr); + if (!clk_mgr->wm_range_table) { + BREAK_TO_DEBUGGER(); + return; + } } void dcn32_clk_mgr_destroy(struct clk_mgr_internal *clk_mgr) diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c index 5a8d1a051314..6c58618f1b9c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c @@ -2062,6 +2062,9 @@ bool dcn30_validate_bandwidth(struct dc *dc, BW_VAL_TRACE_COUNT(); + if (!pipes) + goto validate_fail; + DC_FP_START(); out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate, true); DC_FP_END(); diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c index d3f76512841b..73a7b1ec353e 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c @@ -1324,6 +1324,8 @@ static struct hpo_dp_link_encoder *dcn31_hpo_dp_link_encoder_create( /* allocate HPO link encoder */ hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL); + if (!hpo_dp_enc31) + return NULL; /* out of memory */ hpo_dp_link_encoder31_construct(hpo_dp_enc31, ctx, inst, &hpo_dp_link_enc_regs[inst], @@ -1773,6 +1775,9 @@ bool dcn31_validate_bandwidth(struct dc *dc, BW_VAL_TRACE_COUNT(); + if (!pipes) + goto validate_fail; + DC_FP_START(); out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate, true); DC_FP_END(); diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c index 6b8abdb5c7f8..1a4280b89a1f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c @@ -1372,6 +1372,8 @@ static struct hpo_dp_link_encoder *dcn31_hpo_dp_link_encoder_create( /* allocate HPO link encoder */ hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL); + if (!hpo_dp_enc31) + return NULL; /* out of memory */ hpo_dp_link_encoder31_construct(hpo_dp_enc31, ctx, inst, &hpo_dp_link_enc_regs[inst], @@ -1743,6 +1745,9 @@ bool dcn314_validate_bandwidth(struct dc *dc, BW_VAL_TRACE_COUNT(); + if (!pipes) + goto validate_fail; + if (filter_modes_for_single_channel_workaround(dc, context)) goto validate_fail; diff --git a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c index b9b1e5ac4f53..e78954514e3e 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c @@ -1325,6 +1325,8 @@ static struct hpo_dp_link_encoder *dcn31_hpo_dp_link_encoder_create( /* allocate HPO link encoder */ hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL); + if (!hpo_dp_enc31) + return NULL; /* out of memory */ hpo_dp_link_encoder31_construct(hpo_dp_enc31, ctx, inst, &hpo_dp_link_enc_regs[inst], diff --git a/drivers/gpu/drm/amd/display/dc/dcn316/dcn316_resource.c b/drivers/gpu/drm/amd/display/dc/dcn316/dcn316_resource.c index af3eddc0cf32..932fe9b5c08c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn316/dcn316_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn316/dcn316_resource.c @@ -1322,6 +1322,8 @@ static struct hpo_dp_link_encoder *dcn31_hpo_dp_link_encoder_create( /* allocate HPO link encoder */ hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL); + if (!hpo_dp_enc31) + return NULL; /* out of memory */ hpo_dp_link_encoder31_construct(hpo_dp_enc31, ctx, inst, &hpo_dp_link_enc_regs[inst], diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c index ef47fb2f6905..1b1534ffee9f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c @@ -1310,6 +1310,8 @@ static struct hpo_dp_link_encoder *dcn32_hpo_dp_link_encoder_create( /* allocate HPO link encoder */ hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL); + if (!hpo_dp_enc31) + return NULL; /* out of memory */ #undef REG_STRUCT #define REG_STRUCT hpo_dp_link_enc_regs @@ -1855,6 +1857,9 @@ bool dcn32_validate_bandwidth(struct dc *dc, BW_VAL_TRACE_COUNT(); + if (!pipes) + goto validate_fail; + DC_FP_START(); out = dcn32_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate); DC_FP_END(); diff --git a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c index aed92ced7b76..85430e5baa45 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c @@ -1296,6 +1296,8 @@ static struct hpo_dp_link_encoder *dcn321_hpo_dp_link_encoder_create( /* allocate HPO link encoder */ hpo_dp_enc31 = kzalloc(sizeof(struct dcn31_hpo_dp_link_encoder), GFP_KERNEL); + if (!hpo_dp_enc31) + return NULL; /* out of memory */ #undef REG_STRUCT #define REG_STRUCT hpo_dp_link_enc_regs -- 2.43.0

2 weeks, 6 days

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[PATCH] net: fix uninitialised access in mii_nway_restart()

by Qasim Ijaz

In mii_nway_restart() during the line: bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR); The code attempts to call mii->mdio_read which is ch9200_mdio_read(). ch9200_mdio_read() utilises a local buffer, which is initialised with control_read(): unsigned char buff[2]; However buff is conditionally initialised inside control_read(): if (err == size) { memcpy(data, buf, size); } If the condition of "err == size" is not met, then buff remains uninitialised. Once this happens the uninitialised buff is accessed and returned during ch9200_mdio_read(): return (buff[0] | buff[1] << 8); The problem stems from the fact that ch9200_mdio_read() ignores the return value of control_read(), leading to uinit-access of buff. To fix this we should check the return value of control_read() and return early on error. Signed-off-by: Qasim Ijaz <qasdev00(a)gmail.com> Reported-by: syzbot <syzbot+3361c2d6f78a3e0892f9(a)syzkaller.appspotmail.com> Tested-by: syzbot <syzbot+3361c2d6f78a3e0892f9(a)syzkaller.appspotmail.com> Closes: https://syzkaller.appspot.com/bug?extid=3361c2d6f78a3e0892f9 Fixes: 4a476bd6d1d9 ("usbnet: New driver for QinHeng CH9200 devices") Cc: stable(a)vger.kernel.org --- drivers/net/mii.c | 2 ++ drivers/net/usb/ch9200.c | 7 +++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/mii.c b/drivers/net/mii.c index 37bc3131d31a..e305bf0f1d04 100644 --- a/drivers/net/mii.c +++ b/drivers/net/mii.c @@ -464,6 +464,8 @@ int mii_nway_restart (struct mii_if_info *mii) /* if autoneg is off, it's an error */ bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR); + if (bmcr < 0) + return bmcr; if (bmcr & BMCR_ANENABLE) { bmcr |= BMCR_ANRESTART; diff --git a/drivers/net/usb/ch9200.c b/drivers/net/usb/ch9200.c index f69d9b902da0..e32d3c282dc1 100644 --- a/drivers/net/usb/ch9200.c +++ b/drivers/net/usb/ch9200.c @@ -178,6 +178,7 @@ static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc) { struct usbnet *dev = netdev_priv(netdev); unsigned char buff[2]; + int ret; netdev_dbg(netdev, "%s phy_id:%02x loc:%02x\n", __func__, phy_id, loc); @@ -185,8 +186,10 @@ static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc) if (phy_id != 0) return -ENODEV; - control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02, - CONTROL_TIMEOUT_MS); + ret = control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02, + CONTROL_TIMEOUT_MS); + if (ret != 2) + return ret < 0 ? ret : -EINVAL; return (buff[0] | buff[1] << 8); } -- 2.39.5

2 weeks, 6 days

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[BUG REPORT] cifs: Deadlock due to network reconnection during file writing

by Wang Zhaolong

In the code of the LTS branch that is being maintained (from linux-5.4 to linux-6.6), a deadlock occurs in the network reconnection scenario When multiple processes or threads write to the same file concurrently. Take the code of linux-5.10 as an example. The simplified deadlock process is as follows: ``` Process 1 Process 2 lock_page() - [1] wait_on_page_writeback() - [2] Waiting for writeback, blocked by [4] lock_page() - [3] Blocked by [1] end_page_writeback() - [4] Won't execute ``` Based on my research, I'm going to use two detailed scenarios to illustrate the issue. Scenarios 1: ``` P1 (dd) P2 (cifsd) P3 (cifsiod) cifs_writepages wdata_prepare_pages lock_page - [1] wait_on_page_writeback - [2] Waiting for writeback, blocked by [4] wait_on_page_bit cifs_demultiplex_thread cifs_read_from_socket cifs_readv_from_socket - If another process triggers reconnect at this point cifs_reconnect - mid->mid_state updated to MID_RETRY_NEEDED smb2_writev_callback mid_entry->callback() - mid_state leads to wdata->result = -EAGAIN wdata->result = -EAGAIN queue_work(cifsiod_wq, &wdata->work); cifs_writev_complete - worker function - wdata->result == -EAGAIN Condition satisfied cifs_writev_requeue lock_page - [3] Blocked by [1] end_page_writeback - [4] Won't execute unlock_page ``` Mainline refactoring commit d08089f649a0 ("cifs: Change the I/O paths to use an iterator rather than a page list") unlock folio while waiting for the writeback to complete. This patch is introduced in v6.3-rc1. Therefore, scenario 1 only affects LTS versions from linux-5.4 to linux-6.1. Call stack trace: ``` cat /proc/34/stack [<0>] __lock_page+0x147/0x3a0 [<0>] cifs_writev_requeue.cold+0x185/0x28e [<0>] process_one_work+0x1df/0x3b0 [<0>] worker_thread+0x4a/0x3c0 [<0>] kthread+0x125/0x160 [<0>] ret_from_fork+0x22/0x30 # cat /proc/465/stack [<0>] wait_on_page_bit+0x106/0x2e0 [<0>] wait_on_page_writeback+0x25/0xd0 [<0>] cifs_writepages+0x5ee/0xf60 [<0>] do_writepages+0x43/0xe0 [<0>] __filemap_fdatawrite_range+0xcd/0x110 [<0>] file_write_and_wait_range+0x40/0x90 [<0>] cifs_strict_fsync+0x35/0x470 [<0>] do_fsync+0x38/0x70 [<0>] __x64_sys_fsync+0x10/0x20 [<0>] do_syscall_64+0x33/0x40 [<0>] entry_SYSCALL_64_after_hwframe+0x67/0xd1 [ 369.826215] INFO: task kworker/1:1:34 blocked for more than 122 seconds. [ 369.828964] Not tainted 5.10.0+ #164 [ 369.830623] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 369.835104] task:kworker/1:1 state:D stack:13472 pid: 34 ppid: 2 flags:0x00004000 [ 369.838448] Workqueue: cifsiod cifs_writev_complete [ 369.840242] Call Trace: [ 369.841219] __schedule+0x401/0x8e0 [ 369.842568] schedule+0x49/0x130 [ 369.843785] io_schedule+0x12/0x40 [ 369.845079] __lock_page+0x147/0x3a0 [ 369.846444] ? add_to_page_cache_lru+0x180/0x180 [ 369.847963] cifs_writev_requeue.cold+0x185/0x28e [ 369.849193] process_one_work+0x1df/0x3b0 [ 369.850248] worker_thread+0x4a/0x3c0 [ 369.851216] ? process_one_work+0x3b0/0x3b0 [ 369.852308] kthread+0x125/0x160 [ 369.853167] ? kthread_park+0x90/0x90 [ 369.854142] ret_from_fork+0x22/0x30 [ 369.855054] INFO: task kworker/u8:3:96 blocked for more than 122 seconds. [ 369.856781] Not tainted 5.10.0+ #164 [ 369.857851] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 369.859419] task:kworker/u8:3 state:D stack:12744 pid: 96 ppid: 2 flags:0x00004000 [ 369.861041] Workqueue: writeback wb_workfn (flush-cifs-2) [ 369.862095] Call Trace: [ 369.862583] __schedule+0x401/0x8e0 [ 369.863280] schedule+0x49/0x130 [ 369.863912] io_schedule+0x12/0x40 [ 369.864604] __lock_page+0x147/0x3a0 [ 369.865322] ? add_to_page_cache_lru+0x180/0x180 [ 369.866246] cifs_writepages+0x620/0xf60 [ 369.867005] do_writepages+0x43/0xe0 [ 369.867737] ? __blk_mq_try_issue_directly+0x121/0x1c0 [ 369.868750] __writeback_single_inode+0x3d/0x320 [ 369.869589] writeback_sb_inodes+0x20d/0x480 [ 369.870367] __writeback_inodes_wb+0x4c/0xe0 [ 369.871148] wb_writeback+0x201/0x2f0 [ 369.871797] wb_workfn+0x38a/0x4e0 [ 369.872427] ? check_preempt_curr+0x47/0x70 [ 369.873191] ? ttwu_do_wakeup.isra.0+0x17/0x170 [ 369.873999] process_one_work+0x1df/0x3b0 [ 369.874741] worker_thread+0x4a/0x3c0 [ 369.875421] ? process_one_work+0x3b0/0x3b0 [ 369.876180] kthread+0x125/0x160 [ 369.876761] ? kthread_park+0x90/0x90 [ 369.877431] ret_from_fork+0x22/0x30 [ 369.878106] INFO: task a.out:465 blocked for more than 122 seconds. [ 369.879225] Not tainted 5.10.0+ #164 [ 369.879945] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 369.881316] task:a.out state:D stack:12752 pid: 465 ppid: 386 flags:0x00000002 [ 369.882791] Call Trace: [ 369.883263] __schedule+0x401/0x8e0 [ 369.883884] schedule+0x49/0x130 [ 369.884447] io_schedule+0x12/0x40 [ 369.885054] wait_on_page_bit+0x106/0x2e0 [ 369.885795] ? add_to_page_cache_lru+0x180/0x180 [ 369.886631] wait_on_page_writeback+0x25/0xd0 [ 369.887427] cifs_writepages+0x5ee/0xf60 [ 369.888151] do_writepages+0x43/0xe0 [ 369.888789] ? __generic_file_write_iter+0xfd/0x1d0 [ 369.889663] __filemap_fdatawrite_range+0xcd/0x110 [ 369.890523] file_write_and_wait_range+0x40/0x90 [ 369.891360] cifs_strict_fsync+0x35/0x470 [ 369.892094] do_fsync+0x38/0x70 [ 369.892657] __x64_sys_fsync+0x10/0x20 [ 369.893336] do_syscall_64+0x33/0x40 [ 369.893978] entry_SYSCALL_64_after_hwframe+0x67/0xd1 [ 369.894883] RIP: 0033:0x7f660e208950 [ 369.895538] RSP: 002b:00007fff52b27b78 EFLAGS: 00000202 ORIG_RAX: 000000000000004a [ 369.896882] RAX: ffffffffffffffda RBX: 00007fff52b28cb8 RCX: 00007f660e208950 [ 369.898139] RDX: 0000000000001000 RSI: 00007fff52b27b80 RDI: 0000000000000003 [ 369.899395] RBP: 00007fff52b28ba0 R08: 0000000000000410 R09: 0000000000000001 [ 369.900661] R10: 00007f660e11c400 R11: 0000000000000202 R12: 0000000000000000 [ 369.901925] R13: 00007fff52b28cc8 R14: 00007f660e328000 R15: 000055b5aeb6fdd8 [ 369.903202] INFO: task sync:468 blocked for more than 122 seconds. [ 369.904311] Not tainted 5.10.0+ #164 [ 369.905034] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 369.906457] task:sync state:D stack:13632 pid: 468 ppid: 386 flags:0x00004002 [ 369.907930] Call Trace: [ 369.908369] __schedule+0x401/0x8e0 [ 369.908984] schedule+0x49/0x130 [ 369.909582] io_schedule+0x12/0x40 [ 369.910208] wait_on_page_bit+0x106/0x2e0 [ 369.910918] ? add_to_page_cache_lru+0x180/0x180 [ 369.911758] wait_on_page_writeback+0x25/0xd0 [ 369.912560] __filemap_fdatawait_range+0x83/0x110 [ 369.913408] ? __add_pages+0x6f/0x1b0 [ 369.914089] filemap_fdatawait_keep_errors+0x1a/0x50 [ 369.914957] sync_inodes_sb+0x208/0x2a0 [ 369.915666] ? __x64_sys_tee+0xd0/0xd0 [ 369.916344] iterate_supers+0x90/0xe0 [ 369.916983] ksys_sync+0x40/0xb0 [ 369.917590] __do_sys_sync+0xa/0x20 [ 369.918240] do_syscall_64+0x33/0x40 [ 369.918884] entry_SYSCALL_64_after_hwframe+0x67/0xd1 [ 369.919800] RIP: 0033:0x7f746d820987 [ 369.920451] RSP: 002b:00007ffce853fd78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a2 [ 369.921798] RAX: ffffffffffffffda RBX: 00007ffce853fed8 RCX: 00007f746d820987 [ 369.923063] RDX: 00007f746d8f4801 RSI: 00007ffce8541f71 RDI: 00007f746d8b05ad [ 369.924339] RBP: 0000000000000001 R08: 000000000000ffff R09: 0000000000000000 [ 369.925605] R10: 00007f746d7308a0 R11: 0000000000000206 R12: 000055b8487470fb [ 369.926866] R13: 0000000000000000 R14: 0000000000000000 R15: 000055b848749ce0 [ 369.928138] Kernel panic - not syncing: hung_task: blocked tasks [ 369.929191] CPU: 3 PID: 35 Comm: khungtaskd Not tainted 5.10.0+ #164 [ 369.952450] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 [ 369.956984] Call Trace: [ 369.957973] dump_stack+0x57/0x6e [ 369.959273] panic+0x115/0x2f1 [ 369.960476] watchdog.cold+0xb5/0xb5 [ 369.961884] ? hungtask_pm_notify+0x40/0x40 [ 369.963310] kthread+0x125/0x160 [ 369.964354] ? kthread_park+0x90/0x90 [ 369.965551] ret_from_fork+0x22/0x30 [ 369.967673] Kernel Offset: 0xd600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 369.971025] ---[ end Kernel panic - not syncing: hung_task: blocked tasks ]--- ``` Scenarios 2: Scenario 2 occurs in strict cache mode ``` P1 (dd) P2 (cifsd) P3 (cifsiod) cifs_strict_writev cifs_zap_mapping - If something breaks the oplock cifs_revalidate_mapping cifs_invalidate_mapping invalidate_inode_pages2 invalidate_inode_pages2_range lock_page - [1] wait_on_page_writeback - [2] Waiting for writeback, blocked by [4] wait_on_page_bit cifs_demultiplex_thread cifs_read_from_socket cifs_readv_from_socket - If another process triggers reconnect at this point cifs_reconnect - mid->mid_state updated to MID_RETRY_NEEDED smb2_writev_callback mid_entry->callback() - mid_state leads to wdata->result = -EAGAIN wdata->result = -EAGAIN queue_work(cifsiod_wq, &wdata->work); cifs_writev_complete - worker function - wdata->result == -EAGAIN Condition satisfied cifs_writev_requeue lock_page - [3] Blocked by [1] end_page_writeback - [4] Won't execute unlock_page ``` Mainline refactoring commit 3ee1a1fc3981 ("cifs: Cut over to using netfslib") directly terminates the file write instead of resending data when smb2_writev_callback() detects a write failure, thus avoiding this problem. This patch is introduced in v6.10-rc1. Therefore, scenario 2 affects LTS versions from linux-5.4 to linux-6.6. ``` cat /proc/522/stack [<0>] wait_on_page_bit+0x106/0x150 [<0>] invalidate_inode_pages2_range+0x2cc/0x580 [<0>] cifs_invalidate_mapping+0x2c/0x50 [cifs] [<0>] cifs_revalidate_mapping+0x4c/0x90 [cifs] [<0>] cifs_strict_writev+0x17a/0x250 [cifs] [<0>] __vfs_write+0x14f/0x1b0 [<0>] vfs_write+0xb6/0x1a0 [<0>] ksys_write+0x57/0xd0 [<0>] do_syscall_64+0x63/0x250 [<0>] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [<0>] 0xffffffffffffffff cat /proc/33/stack [<0>] __lock_page+0x10c/0x160 [<0>] cifs_writev_requeue.cold+0x17e/0x239 [cifs] [<0>] process_one_work+0x1a9/0x3f0 [<0>] worker_thread+0x50/0x3c0 [<0>] kthread+0x117/0x130 [<0>] ret_from_fork+0x35/0x40 [<0>] 0xffffffffffffffff ``` The root cause of the deadlock problem is that the page/folio is locked again in cifs_writev_requeue(). In order to safely fix it on the LTS branches, I would like to clarify the following questions:, 1. Whether resending is necessary. If retransmission is not required, simply terminating the write would avoids this problem. Is this an acceptable solution? 2. Is it necessary to lock the page/folio in cifs_writev_requeue()? Based on my code screening (possibly missing), there seems to be no process that modifies a page when it is marked as PG_writeback.Therefore, the page does not need to be locked during wait_on_page_writeback().

2 weeks, 6 days

3
4
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[PATCH net v2] drop_monitor: fix incorrect initialization order

by Gavrilov Ilia

Syzkaller reports the following bug: BUG: spinlock bad magic on CPU#1, syz-executor.0/7995 lock: 0xffff88805303f3e0, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 CPU: 1 PID: 7995 Comm: syz-executor.0 Tainted: G E 5.10.209+ #1 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x119/0x179 lib/dump_stack.c:118 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] do_raw_spin_lock+0x1f6/0x270 kernel/locking/spinlock_debug.c:112 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0x50/0x70 kernel/locking/spinlock.c:159 reset_per_cpu_data+0xe6/0x240 [drop_monitor] net_dm_cmd_trace+0x43d/0x17a0 [drop_monitor] genl_family_rcv_msg_doit+0x22f/0x330 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x341/0x5a0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x14d/0x440 net/netlink/af_netlink.c:2497 genl_rcv+0x29/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x54b/0x800 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x914/0xe00 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:651 [inline] __sock_sendmsg+0x157/0x190 net/socket.c:663 ____sys_sendmsg+0x712/0x870 net/socket.c:2378 ___sys_sendmsg+0xf8/0x170 net/socket.c:2432 __sys_sendmsg+0xea/0x1b0 net/socket.c:2461 do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x62/0xc7 RIP: 0033:0x7f3f9815aee9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3f972bf0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f3f9826d050 RCX: 00007f3f9815aee9 RDX: 0000000020000000 RSI: 0000000020001300 RDI: 0000000000000007 RBP: 00007f3f981b63bd R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f3f9826d050 R15: 00007ffe01ee6768 If drop_monitor is built as a kernel module, syzkaller may have time to send a netlink NET_DM_CMD_START message during the module loading. This will call the net_dm_monitor_start() function that uses a spinlock that has not yet been initialized. To fix this, let's place resource initialization above the registration of a generic netlink family. Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with Syzkaller. Fixes: 9a8afc8d3962 ("Network Drop Monitor: Adding drop monitor implementation & Netlink protocol") Cc: stable(a)vger.kernel.org Signed-off-by: Ilia Gavrilov <Ilia.Gavrilov(a)infotecs.ru> --- V2: - Move the registration of the netlink family to the end of the module initialization function net/core/drop_monitor.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c index 6efd4cccc9dd..212f0a048cab 100644 --- a/net/core/drop_monitor.c +++ b/net/core/drop_monitor.c @@ -1734,30 +1734,30 @@ static int __init init_net_drop_monitor(void) return -ENOSPC; } - rc = genl_register_family(&net_drop_monitor_family); - if (rc) { - pr_err("Could not create drop monitor netlink family\n"); - return rc; + for_each_possible_cpu(cpu) { + net_dm_cpu_data_init(cpu); + net_dm_hw_cpu_data_init(cpu); } - WARN_ON(net_drop_monitor_family.mcgrp_offset != NET_DM_GRP_ALERT); rc = register_netdevice_notifier(&dropmon_net_notifier); if (rc < 0) { pr_crit("Failed to register netdevice notifier\n"); + return rc; + } + + rc = genl_register_family(&net_drop_monitor_family); + if (rc) { + pr_err("Could not create drop monitor netlink family\n"); goto out_unreg; } + WARN_ON(net_drop_monitor_family.mcgrp_offset != NET_DM_GRP_ALERT); rc = 0; - for_each_possible_cpu(cpu) { - net_dm_cpu_data_init(cpu); - net_dm_hw_cpu_data_init(cpu); - } - goto out; out_unreg: - genl_unregister_family(&net_drop_monitor_family); + WARN_ON(unregister_netdevice_notifier(&dropmon_net_notifier)); out: return rc; } @@ -1766,19 +1766,18 @@ static void exit_net_drop_monitor(void) { int cpu; - BUG_ON(unregister_netdevice_notifier(&dropmon_net_notifier)); - /* * Because of the module_get/put we do in the trace state change path * we are guaranteed not to have any current users when we get here */ + BUG_ON(genl_unregister_family(&net_drop_monitor_family)); + + BUG_ON(unregister_netdevice_notifier(&dropmon_net_notifier)); for_each_possible_cpu(cpu) { net_dm_hw_cpu_data_fini(cpu); net_dm_cpu_data_fini(cpu); } - - BUG_ON(genl_unregister_family(&net_drop_monitor_family)); } module_init(init_net_drop_monitor); -- 2.39.5

2 weeks, 6 days

3
2
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[PATCH] irqchip/gic-v3: Fix rk3399 workaround when secure interrupts are enabled

by Marc Zyngier

Christoph reports that their rk3399 system dies since we merged 773c05f417fa1 ("irqchip/gic-v3: Work around insecure GIC integrations"). It appears that some rk3399 have some secure payloads, and that the firmware sets SCR_EL3.FIQ==1. Obivously, disabling security in that configuration leads to even more problems. Let's revisit the workaround by: - making it rk3399 specific - checking whether Group-0 is available, which is a good proxy for SCR_EL3.FIQ being 0 - either apply the workaround if Group-0 is available, or disable pseudo-NMIs if not Note that this doesn't mean that the secure side is able to receive interrupts anyway, as we make all interrupts non-secure anyway. Clearly, nobody ever tested secure interrupts on this platform. With that, Christoph is able to use their rk3399. Reported-by: Christoph Fritz <chf.fritz(a)googlemail.com> Tested-by: Christoph Fritz <chf.fritz(a)googlemail.com> Signed-off-by: Marc Zyngier <maz(a)kernel.org> Cc: stable(a)vger.kernel.org Fixes: 773c05f417fa1 ("irqchip/gic-v3: Work around insecure GIC integrations") Link: https://lore.kernel.org/r/b1266652fb64857246e8babdf268d0df8f0c36d9.camel@go… --- drivers/irqchip/irq-gic-v3.c | 53 +++++++++++++++++++++++++++--------- 1 file changed, 40 insertions(+), 13 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 76dce0aac2465..270d7a4d85a6d 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -44,6 +44,7 @@ static u8 dist_prio_nmi __ro_after_init = GICV3_PRIO_NMI; #define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0) #define FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539 (1ULL << 1) #define FLAGS_WORKAROUND_ASR_ERRATUM_8601001 (1ULL << 2) +#define FLAGS_WORKAROUND_INSECURE (1ULL << 3) #define GIC_IRQ_TYPE_PARTITION (GIC_IRQ_TYPE_LPI + 1) @@ -83,6 +84,8 @@ static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key); #define GIC_LINE_NR min(GICD_TYPER_SPIS(gic_data.rdists.gicd_typer), 1020U) #define GIC_ESPI_NR GICD_TYPER_ESPIS(gic_data.rdists.gicd_typer) +static bool nmi_support_forbidden; + /* * There are 16 SGIs, though we only actually use 8 in Linux. The other 8 SGIs * are potentially stolen by the secure side. Some code, especially code dealing @@ -163,21 +166,27 @@ static void __init gic_prio_init(void) { bool ds; - ds = gic_dist_security_disabled(); - if (!ds) { - u32 val; - - val = readl_relaxed(gic_data.dist_base + GICD_CTLR); - val |= GICD_CTLR_DS; - writel_relaxed(val, gic_data.dist_base + GICD_CTLR); + cpus_have_group0 = gic_has_group0(); - ds = gic_dist_security_disabled(); - if (ds) - pr_warn("Broken GIC integration, security disabled"); + ds = gic_dist_security_disabled(); + if ((gic_data.flags & FLAGS_WORKAROUND_INSECURE) && !ds) { + if (cpus_have_group0) { + u32 val; + + val = readl_relaxed(gic_data.dist_base + GICD_CTLR); + val |= GICD_CTLR_DS; + writel_relaxed(val, gic_data.dist_base + GICD_CTLR); + + ds = gic_dist_security_disabled(); + if (ds) + pr_warn("Broken GIC integration, security disabled\n"); + } else { + pr_warn("Broken GIC integration, pNMI forbidden\n"); + nmi_support_forbidden = true; + } } cpus_have_security_disabled = ds; - cpus_have_group0 = gic_has_group0(); /* * How priority values are used by the GIC depends on two things: @@ -209,7 +218,7 @@ static void __init gic_prio_init(void) * be in the non-secure range, we program the non-secure values into * the distributor to match the PMR values we want. */ - if (cpus_have_group0 & !cpus_have_security_disabled) { + if (cpus_have_group0 && !cpus_have_security_disabled) { dist_prio_irq = __gicv3_prio_to_ns(dist_prio_irq); dist_prio_nmi = __gicv3_prio_to_ns(dist_prio_nmi); } @@ -1922,6 +1931,18 @@ static bool gic_enable_quirk_arm64_2941627(void *data) return true; } +static bool gic_enable_quirk_rk3399(void *data) +{ + struct gic_chip_data *d = data; + + if (of_machine_is_compatible("rockchip,rk3399")) { + d->flags |= FLAGS_WORKAROUND_INSECURE; + return true; + } + + return false; +} + static bool rd_set_non_coherent(void *data) { struct gic_chip_data *d = data; @@ -1996,6 +2017,12 @@ static const struct gic_quirk gic_quirks[] = { .property = "dma-noncoherent", .init = rd_set_non_coherent, }, + { + .desc = "GICv3: Insecure RK3399 integration", + .iidr = 0x0000043b, + .mask = 0xff000fff, + .init = gic_enable_quirk_rk3399, + }, { } }; @@ -2004,7 +2031,7 @@ static void gic_enable_nmi_support(void) { int i; - if (!gic_prio_masking_enabled()) + if (!gic_prio_masking_enabled() || nmi_support_forbidden) return; rdist_nmi_refs = kcalloc(gic_data.ppi_nr + SGI_NR, -- 2.39.2

2 weeks, 6 days

2
1
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[PATCH 5.10 0/1] Backport upsteam fix 70e6b7d9ae3c63df90a7bba7700e8d5c300c3c60

by jaywang-amazon

Backport upstream commit 70e6b7d9ae3c63df90a7bba7700e8d5c300c3c60 to stable 5.10. David Woodhouse (1): x86/i8253: Disable PIT timer 0 when not in use arch/x86/kernel/i8253.c | 11 +++++++++-- drivers/clocksource/i8253.c | 13 +++++++++---- include/linux/i8253.h | 1 + 3 files changed, 19 insertions(+), 6 deletions(-) -- 2.47.1

2 weeks, 6 days

1
1
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[PATCH] nfp: bpf: Add check for nfp_app_ctrl_msg_alloc()

by Haoxiang Li

Add check for the return value of nfp_app_ctrl_msg_alloc() in nfp_bpf_cmsg_alloc() to prevent null pointer dereference. Fixes: ff3d43f7568c ("nfp: bpf: implement helpers for FW map ops") Cc: stable(a)vger.kernel.org Signed-off-by: Haoxiang Li <haoxiang_li2024(a)163.com> --- drivers/net/ethernet/netronome/nfp/bpf/cmsg.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c index 2ec62c8d86e1..09ea1bc72097 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/cmsg.c @@ -20,6 +20,9 @@ nfp_bpf_cmsg_alloc(struct nfp_app_bpf *bpf, unsigned int size) struct sk_buff *skb; skb = nfp_app_ctrl_msg_alloc(bpf->app, size, GFP_KERNEL); + if (!skb) { + return NULL; + } skb_put(skb, size); return skb; -- 2.25.1

2 weeks, 6 days

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[PATCH] media: verisilicon: Fix AV1 decoder clock frequency

by Nicolas Dufresne

The desired clock frequency was correctly set to 400MHz in the device tree but was lowered by the driver to 300MHz breaking 4K 60Hz content playback. Fix the issue by removing the driver call to clk_set_rate(), which reduce the amount of board specific code. Fixes: 003afda97c65 ("media: verisilicon: Enable AV1 decoder on rk3588") Signed-off-by: Nicolas Dufresne <nicolas.dufresne(a)collabora.com> --- This patch fixes user report of AV1 4K60 decoder not being fast enough on RK3588 based SoC. This is a break from Hantro original authors habbit of coding the frequencies in the driver instead of specifying this frequency in the device tree. The other calls to clk_set_rate() are left since this would require modifying many dtsi files, which would then be unsuitable for backport. --- drivers/media/platform/verisilicon/rockchip_vpu_hw.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/media/platform/verisilicon/rockchip_vpu_hw.c b/drivers/media/platform/verisilicon/rockchip_vpu_hw.c index 964122e7c355934cd80eb442219f6ba51bba8b71..9d8eab33556d62733ec7ec6b5e685c86ba7086e4 100644 --- a/drivers/media/platform/verisilicon/rockchip_vpu_hw.c +++ b/drivers/media/platform/verisilicon/rockchip_vpu_hw.c @@ -17,7 +17,6 @@ #define RK3066_ACLK_MAX_FREQ (300 * 1000 * 1000) #define RK3288_ACLK_MAX_FREQ (400 * 1000 * 1000) -#define RK3588_ACLK_MAX_FREQ (300 * 1000 * 1000) #define ROCKCHIP_VPU981_MIN_SIZE 64 @@ -440,10 +439,9 @@ static int rk3066_vpu_hw_init(struct hantro_dev *vpu) return 0; } +/* TODO just remove, the CLK are defined correctly in the DTS */ static int rk3588_vpu981_hw_init(struct hantro_dev *vpu) { - /* Bump ACLKs to max. possible freq. to improve performance. */ - clk_set_rate(vpu->clocks[0].clk, RK3588_ACLK_MAX_FREQ); return 0; } @@ -807,7 +805,6 @@ const struct hantro_variant rk3588_vpu981_variant = { .codec_ops = rk3588_vpu981_codec_ops, .irqs = rk3588_vpu981_irqs, .num_irqs = ARRAY_SIZE(rk3588_vpu981_irqs), - .init = rk3588_vpu981_hw_init, .clk_names = rk3588_vpu981_vpu_clk_names, .num_clocks = ARRAY_SIZE(rk3588_vpu981_vpu_clk_names) }; --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20250217-b4-hantro-av1-clock-rate-e5497f1499df Best regards, -- Nicolas Dufresne <nicolas.dufresne(a)collabora.com>

2 weeks, 6 days

2
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Linux-stable-mirror February 2025