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on aws-us-west-2-korg-listserv-alma10-1 On Sep 29, 2026 / 16:56, Nilay Shroff wrote: > Concurrently disabling a passthru controller while passthru I/Os are > in flight can potentially result in a use-after-free. Introduce a > percpu refcount, an atomic flag, and an nvmet request flag to protect > the passthru controller lifetime. > > When enabling the passthru controller, initialize the percpu refcount > and set the enabled flag. Each passthru I/O acquires a reference before > entering the passthru hotpath and sets an nvmet request flag to record > that the reference is held. The reference is released when the I/O > completes. > > When disabling the passthru controller, clear the enabled flag, kill > the percpu refcount, and wait for all in-flight I/Os to release their > references before releasing the passthru controller. > > Disable operations are serialized by subsys->lock. The enabled flag > ensures that only the first disable operation proceeds and subsequent > attempts observe the flag as cleared and return. > > Once disabling starts, new I/Os either fail to be routed to the > passthru path or fail to acquire a live reference, and therefore cannot > dereference the passthru controller and thus avoid use-after-free. > > Signed-off-by: Nilay Shroff Hi, Nilay I ran blktests with the kernel v7.4-rc1, and found the test case nvme/037 hangs when it runs for rdma transport and siw driver [1]. I bisected and found this patch as the commit 5e12d81874a1 is the trigger. If this han is a new issue, fix actions will be appreciated. [1] dmesg at nvme/037 hang [ 3800.092349] [ T66191] run blktests nvme/037 at 2026-11-02 13:46:33.187037133 [ 3800.407876] [ T66934] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3800.579559] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-0 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3800.601419] [ T66942] nvme nvme5: creating 4 I/O queues. [ 3800.603382] [ T66942] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3800.728997] [ T66942] nvme nvme5: new ctrl: NQhN "blktests-subsystem-0", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3801.087205] [ T66966] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-0" [ 3801.531391] [ T66991] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3801.688110] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-1 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3801.704598] [ T66999] nvme nvme5: creating 4 I/O queues. [ 3801.706191] [ T66999] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3801.824182] [ T66999] nvme nvme5: new ctrl: NQN "blktests-subsystem-1", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3802.184483] [ T67023] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-1" [ 3802.641645] [ T67048] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3802.799232] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-2 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3802.815664] [ T67056] nvme nvme5: creating 4 I/O queues. [ 3802.816931] [ T67056] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3802.935988] [ T67056] nvme nvme5: new ctrl: NQN "blktests-subsystem-2", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3803.290667] [ T67080] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-2" [ 3803.749797] [ T67105] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3803.909791] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-3 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3803.932485] [ T67113] nvme nvme5: creating 4 I/O queues. [ 3803.933765] [ T67113] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3804.054973] [ T67113] nvme nvme5: new ctrl: NQN "blktests-subsystem-3", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3804.413732] [ T67137] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-3" [ 3804.857065] [ T67162] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3805.010639] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-4 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3805.028058] [ T67170] nvme nvme5: creating 4 I/O queues. [ 3805.030124] [ T67170] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3805.155236] [ T67170] nvme nvme5: new ctrl: NQN "blktests-subsystem-4", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3805.527884] [ T67194] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-4" [ 3805.971809] [ T67219] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3806.137857] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-5 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3806.155758] [ T67227] nvme nvme5: creating 4 I/O queues. [ 3806.157395] [ T67227] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3806.277467] [ T67227] nvme nvme5: new ctrl: NQN "blktests-subsystem-5", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3806.641474] [ T67251] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-5" [ 3807.084278] [ T67276] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3807.278228] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-6 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3807.308262] [ T67284] nvme nvme5: creating 4 I/O queues. [ 3807.317068] [ T67284] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3807.469771] [ T67284] nvme nvme5: new ctrl: NQN "blktests-subsystem-6", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3807.937039] [ T67308] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-6" [ 3809.420886] [ T67333] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3809.592288] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-7 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3809.628746] [ T67341] nvme nvme5: creating 4 I/O queues. [ 3809.630196] [ T67341] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3809.768300] [ T67341] nvme nvme5: new ctrl: NQN "blktests-subsystem-7", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3810.178568] [ T67365] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-7" [ 3811.140562] [ T67390] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3811.332824] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-8 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3811.351258] [ T67398] nvme nvme5: creating 4 I/O queues. [ 3811.352718] [ T67398] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3811.491120] [ T67398] nvme nvme5: new ctrl: NQN "blktests-subsystem-8", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3812.000917] [ T67422] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-8" [ 3812.828312] [ T67447] nvmet_rdma: enabling port 0 (10.0.2.15:4420) [ 3812.998293] [ T62940] nvmet: Created nvm controller 1 for subsystem blktests-subsystem-9 for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 3813.017919] [ T67455] nvme nvme5: creating 4 I/O queues. [ 3813.020332] [ T67455] nvme nvme5: mapped 4/0/0 default/read/poll queues. [ 3813.161933] [ T67455] nvme nvme5: new ctrl: NQN "blktests-subsystem-9", addr 10.0.2.15:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 3813.539457] [ T67479] nvme nvme5: Removing ctrl: NQN "blktests-subsystem-9" [ 4056.926027] [ T48] INFO: task check:66191 blocked for more than 122 seconds. [ 4056.931295] [ T48] Not tainted 7.4.0-rc1 #487 [ 4056.931983] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4056.932706] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4056.933524] [ T48] Call Trace: [ 4056.934363] [ T48] [ 4056.935110] [ T48] __schedule+0x1d90/0x6ea0 [ 4056.935828] [ T48] ? __pfx___schedule+0x10/0x10 [ 4056.936501] [ T48] ? lock_acquire+0x1c1/0x340 [ 4056.937175] [ T48] ? schedule+0x24a/0x2e0 [ 4056.937848] [ T48] ? lock_release+0x1b5/0x340 [ 4056.939024] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4056.939719] [ T48] schedule+0xe3/0x2e0 [ 4056.940371] [ T48] schedule_timeout+0x1ac/0x290 [ 4056.940975] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4056.941587] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4056.942166] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4056.942796] [ T48] wait_for_completion+0x17a/0x400 [ 4056.943440] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4056.944065] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4056.944669] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4056.945333] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4056.945950] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4056.946530] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4056.947106] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4056.947713] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4056.948304] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4056.948874] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4056.949405] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4056.949949] [ T48] vfs_write+0x4b3/0xf40 [ 4056.950465] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4056.951003] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4056.951499] [ T48] ? lock_acquire+0x1b1/0x340 [ 4056.952119] [ T48] ksys_write+0x112/0x250 [ 4056.952640] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4056.953138] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4056.953557] [ T48] do_syscall_64+0xf2/0x690 [ 4056.954046] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4056.954486] [ T48] ? do_syscall_64+0x2d/0x690 [ 4056.954952] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4056.955384] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4056.955844] [ T48] ? do_syscall_64+0x60/0x690 [ 4056.956254] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4056.956621] [ T48] RIP: 0033:0x7fb94423d54e [ 4056.956995] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4056.957416] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4056.957852] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4056.958265] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4056.958585] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4056.958999] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4056.959369] [ T48] [ 4056.959741] [ T48] Showing all locks held in the system: [ 4056.960385] [ T48] locks held by pr/ttyS0/47: 2, last CPU#2: [ 4056.960702] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4056.961033] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4056.961403] [ T48] locks held by khungtaskd/48: 1, last CPU#3: [ 4056.961740] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4056.962137] [ T48] locks held by kworker/3:11/65511: 4, on CPU#3: [ 4056.962506] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4056.962894] [ T48] #1: ffff88814eeefd10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4056.963301] [ T48] #2: ffff8881325dca70 (&helper->lock){+.+.}-{4:4}, at: drm_fb_helper_damage_work+0x175/0xac0 [drm_client_lib] [ 4056.963690] [ T48] #3: ffff8881333e0128 (&dev->master_mutex){+.+.}-{4:4}, at: drm_master_internal_acquire+0x1b/0x60 [drm] [ 4056.964134] [ T48] locks held by check/66191: 3, on CPU#1: [ 4056.964542] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4056.964950] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4056.965918] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4056.966796] [ T48] ============================================= [ 4179.806492] [ T48] INFO: task check:66191 blocked for more than 245 seconds. [ 4179.809371] [ T48] Not tainted 7.4.0-rc1 #487 [ 4179.812094] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4179.812633] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4179.813102] [ T48] Call Trace: [ 4179.813539] [ T48] [ 4179.813987] [ T48] __schedule+0x1d90/0x6ea0 [ 4179.814452] [ T48] ? __pfx___schedule+0x10/0x10 [ 4179.814877] [ T48] ? lock_acquire+0x1c1/0x340 [ 4179.815318] [ T48] ? schedule+0x24a/0x2e0 [ 4179.816338] [ T48] ? lock_release+0x1b5/0x340 [ 4179.816784] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4179.817265] [ T48] schedule+0xe3/0x2e0 [ 4179.817700] [ T48] schedule_timeout+0x1ac/0x290 [ 4179.818169] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4179.818623] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4179.819043] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4179.819481] [ T48] wait_for_completion+0x17a/0x400 [ 4179.819934] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4179.820418] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4179.820861] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4179.821371] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4179.821853] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4179.822361] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4179.822829] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4179.823275] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4179.823734] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4179.824162] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4179.824612] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4179.825044] [ T48] vfs_write+0x4b3/0xf40 [ 4179.825477] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4179.825922] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4179.826351] [ T48] ? lock_acquire+0x1b1/0x340 [ 4179.826790] [ T48] ksys_write+0x112/0x250 [ 4179.827204] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4179.827627] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4179.828025] [ T48] do_syscall_64+0xf2/0x690 [ 4179.828414] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4179.828816] [ T48] ? do_syscall_64+0x2d/0x690 [ 4179.829322] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4179.829741] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4179.830125] [ T48] ? do_syscall_64+0x60/0x690 [ 4179.830485] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4179.830856] [ T48] RIP: 0033:0x7fb94423d54e [ 4179.831216] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4179.831583] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4179.831941] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4179.832296] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4179.832665] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4179.833014] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4179.833390] [ T48] [ 4179.833749] [ T48] Showing all locks held in the system: [ 4179.834379] [ T48] locks held by pr/ttyS0/47: 2, last CPU#2: [ 4179.834713] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4179.835055] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4179.835400] [ T48] locks held by khungtaskd/48: 1, last CPU#3: [ 4179.835756] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4179.836149] [ T48] locks held by kworker/3:11/65511: 4, on CPU#3: [ 4179.836481] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4179.836874] [ T48] #1: ffff88814eeefd10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4179.837276] [ T48] #2: ffff8881325dca70 (&helper->lock){+.+.}-{4:4}, at: drm_fb_helper_damage_work+0x175/0xac0 [drm_client_lib] [ 4179.837701] [ T48] #3: ffff8881333e0128 (&dev->master_mutex){+.+.}-{4:4}, at: drm_master_internal_acquire+0x1b/0x60 [drm] [ 4179.838196] [ T48] locks held by check/66191: 3, on CPU#1: [ 4179.838590] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4179.839010] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4179.839429] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4179.840265] [ T48] ============================================= [ 4302.686843] [ T48] INFO: task check:66191 blocked for more than 368 seconds. [ 4302.689729] [ T48] Not tainted 7.4.0-rc1 #487 [ 4302.692595] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4302.695736] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4302.696226] [ T48] Call Trace: [ 4302.696654] [ T48] [ 4302.697069] [ T48] __schedule+0x1d90/0x6ea0 [ 4302.697535] [ T48] ? __pfx___schedule+0x10/0x10 [ 4302.697953] [ T48] ? lock_acquire+0x1c1/0x340 [ 4302.698390] [ T48] ? schedule+0x24a/0x2e0 [ 4302.698805] [ T48] ? lock_release+0x1b5/0x340 [ 4302.699211] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4302.699676] [ T48] schedule+0xe3/0x2e0 [ 4302.700092] [ T48] schedule_timeout+0x1ac/0x290 [ 4302.700524] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4302.700955] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4302.701394] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4302.701815] [ T48] wait_for_completion+0x17a/0x400 [ 4302.702239] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4302.702677] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4302.703098] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4302.703557] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4302.704002] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4302.704463] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4302.704882] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4302.705349] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4302.705792] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4302.706368] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4302.706814] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4302.707242] [ T48] vfs_write+0x4b3/0xf40 [ 4302.707672] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4302.708103] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4302.708538] [ T48] ? lock_acquire+0x1b1/0x340 [ 4302.708966] [ T48] ksys_write+0x112/0x250 [ 4302.709386] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4302.709781] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4302.710180] [ T48] do_syscall_64+0xf2/0x690 [ 4302.710593] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4302.710979] [ T48] ? do_syscall_64+0x2d/0x690 [ 4302.711369] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4302.711739] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4302.712098] [ T48] ? do_syscall_64+0x60/0x690 [ 4302.712470] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4302.712811] [ T48] RIP: 0033:0x7fb94423d54e [ 4302.713160] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4302.713523] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4302.713861] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4302.714208] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4302.714561] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4302.714900] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4302.715244] [ T48] [ 4302.715592] [ T48] Showing all locks held in the system: [ 4302.716268] [ T48] locks held by pr/ttyS0/47: 2, last CPU#2: [ 4302.716616] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4302.716979] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4302.717336] [ T48] locks held by khungtaskd/48: 1, last CPU#3: [ 4302.717688] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4302.718111] [ T48] locks held by kworker/3:11/65511: 4, on CPU#3: [ 4302.718494] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4302.718860] [ T48] #1: ffff88814eeefd10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4302.719260] [ T48] #2: ffff8881325dca70 (&helper->lock){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4302.720166] [ T48] #3: ffff88814eeefa58 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4302.720646] [ T48] locks held by check/66191: 3, on CPU#1: [ 4302.721038] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4302.721499] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4302.721908] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4302.722791] [ T48] ============================================= [ 4425.567220] [ T48] INFO: task check:66191 blocked for more than 491 seconds. [ 4425.570359] [ T48] Not tainted 7.4.0-rc1 #487 [ 4425.573459] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4425.576758] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4425.578392] [ T48] Call Trace: [ 4425.578891] [ T48] [ 4425.579409] [ T48] __schedule+0x1d90/0x6ea0 [ 4425.579937] [ T48] ? __pfx___schedule+0x10/0x10 [ 4425.580417] [ T48] ? lock_acquire+0x1c1/0x340 [ 4425.580885] [ T48] ? schedule+0x24a/0x2e0 [ 4425.581345] [ T48] ? lock_release+0x1b5/0x340 [ 4425.581812] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4425.582313] [ T48] schedule+0xe3/0x2e0 [ 4425.582785] [ T48] schedule_timeout+0x1ac/0x290 [ 4425.583734] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4425.584167] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4425.584604] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4425.585073] [ T48] wait_for_completion+0x17a/0x400 [ 4425.585518] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4425.585968] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4425.586398] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4425.586836] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4425.587329] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4425.587801] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4425.588279] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4425.588743] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4425.589183] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4425.589597] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4425.590021] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4425.590432] [ T48] vfs_write+0x4b3/0xf40 [ 4425.590850] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4425.591261] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4425.591682] [ T48] ? lock_acquire+0x1b1/0x340 [ 4425.592085] [ T48] ksys_write+0x112/0x250 [ 4425.592483] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4425.592889] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4425.593292] [ T48] do_syscall_64+0xf2/0x690 [ 4425.593660] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4425.594065] [ T48] ? do_syscall_64+0x2d/0x690 [ 4425.594454] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4425.594819] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4425.595186] [ T48] ? do_syscall_64+0x60/0x690 [ 4425.595541] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4425.595925] [ T48] RIP: 0033:0x7fb94423d54e [ 4425.596289] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4425.596657] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4425.597015] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4425.597419] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4425.597803] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4425.598146] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4425.598537] [ T48] [ 4425.598950] [ T48] Showing all locks held in the system: [ 4425.599590] [ T48] locks held by pr/ttyS0/47: 2, last CPU#2: [ 4425.599932] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4425.600277] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4425.600605] [ T48] locks held by khungtaskd/48: 1, last CPU#1: [ 4425.600981] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4425.601405] [ T48] locks held by check/66191: 3, on CPU#1: [ 4425.601792] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4425.602160] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4425.602548] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4425.602948] [ T48] locks held by kworker/3:0/67500: 4, on CPU#3: [ 4425.603342] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4425.603756] [ T48] #1: ffff88812b2e7d10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4425.604169] [ T48] #2: ffff8881325dca70 (&helper->lock){+.+.}-{4:4}, at: drm_fb_helper_damage_work+0x175/0xac0 [drm_client_lib] [ 4425.604591] [ T48] #3: ffff8881333e0128 (&dev->master_mutex){+.+.}-{4:4}, at: drm_master_internal_acquire+0x1b/0x60 [drm] [ 4425.605522] [ T48] ============================================= [ 4548.447529] [ T48] INFO: task check:66191 blocked for more than 614 seconds. [ 4548.450305] [ T48] Not tainted 7.4.0-rc1 #487 [ 4548.452756] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4548.453461] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4548.453922] [ T48] Call Trace: [ 4548.454336] [ T48] [ 4548.454739] [ T48] __schedule+0x1d90/0x6ea0 [ 4548.455244] [ T48] ? __pfx___schedule+0x10/0x10 [ 4548.455697] [ T48] ? lock_acquire+0x1c1/0x340 [ 4548.456102] [ T48] ? schedule+0x24a/0x2e0 [ 4548.456549] [ T48] ? lock_release+0x1b5/0x340 [ 4548.457013] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4548.457478] [ T48] schedule+0xe3/0x2e0 [ 4548.457900] [ T48] schedule_timeout+0x1ac/0x290 [ 4548.458341] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4548.458773] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4548.459211] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4548.459639] [ T48] wait_for_completion+0x17a/0x400 [ 4548.460103] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4548.460531] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4548.460998] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4548.461471] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4548.461942] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4548.462383] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4548.462819] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4548.463313] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4548.463741] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4548.464191] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4548.464625] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4548.465107] [ T48] vfs_write+0x4b3/0xf40 [ 4548.465531] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4548.465965] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4548.466401] [ T48] ? lock_acquire+0x1b1/0x340 [ 4548.466849] [ T48] ksys_write+0x112/0x250 [ 4548.467295] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4548.467687] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4548.468108] [ T48] do_syscall_64+0xf2/0x690 [ 4548.468496] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4548.468893] [ T48] ? do_syscall_64+0x2d/0x690 [ 4548.469260] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4548.469663] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4548.470008] [ T48] ? do_syscall_64+0x60/0x690 [ 4548.470386] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4548.470747] [ T48] RIP: 0033:0x7fb94423d54e [ 4548.471149] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4548.471506] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4548.471869] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4548.472223] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4548.472553] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4548.472895] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4548.473260] [ T48] [ 4548.473585] [ T48] Showing all locks held in the system: [ 4548.474272] [ T48] locks held by pr/ttyS0/47: 2, last CPU#2: [ 4548.474572] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4548.474909] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4548.475280] [ T48] locks held by khungtaskd/48: 1, last CPU#1: [ 4548.475633] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4548.476031] [ T48] locks held by check/66191: 3, on CPU#1: [ 4548.476389] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4548.476787] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4548.477199] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4548.477591] [ T48] locks held by kworker/2:1/67503: 4, last CPU#2: [ 4548.477953] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4548.478360] [ T48] #1: ffff888149d8fd10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4548.478766] [ T48] #2: ffff888149d8fa30 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4548.479238] [ T48] #3: ffff888149d8fa58 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4548.480086] [ T48] ============================================= [ 4671.327902] [ T48] INFO: task check:66191 blocked for more than 737 seconds. [ 4671.330876] [ T48] Not tainted 7.4.0-rc1 #487 [ 4671.333073] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4671.333513] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4671.333952] [ T48] Call Trace: [ 4671.334436] [ T48] [ 4671.334920] [ T48] __schedule+0x1d90/0x6ea0 [ 4671.335389] [ T48] ? __pfx___schedule+0x10/0x10 [ 4671.335804] [ T48] ? lock_acquire+0x1c1/0x340 [ 4671.336222] [ T48] ? schedule+0x24a/0x2e0 [ 4671.336651] [ T48] ? lock_release+0x1b5/0x340 [ 4671.337072] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4671.338063] [ T48] schedule+0xe3/0x2e0 [ 4671.338510] [ T48] schedule_timeout+0x1ac/0x290 [ 4671.338932] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4671.339383] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4671.339819] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4671.340272] [ T48] wait_for_completion+0x17a/0x400 [ 4671.340721] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4671.341222] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4671.341678] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4671.342148] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4671.342725] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4671.343169] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4671.343583] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4671.344083] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4671.344581] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4671.345036] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4671.345463] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4671.345869] [ T48] vfs_write+0x4b3/0xf40 [ 4671.346274] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4671.346694] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4671.347117] [ T48] ? lock_acquire+0x1b1/0x340 [ 4671.347536] [ T48] ksys_write+0x112/0x250 [ 4671.347930] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4671.348322] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4671.348720] [ T48] do_syscall_64+0xf2/0x690 [ 4671.349100] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4671.349485] [ T48] ? do_syscall_64+0x2d/0x690 [ 4671.349846] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4671.350209] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4671.350578] [ T48] ? do_syscall_64+0x60/0x690 [ 4671.350927] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4671.351420] [ T48] RIP: 0033:0x7fb94423d54e [ 4671.351784] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4671.352135] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4671.352490] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4671.352822] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4671.353155] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4671.353501] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4671.353837] [ T48] [ 4671.354177] [ T48] Showing all locks held in the system: [ 4671.354803] [ T48] locks held by pr/ttyS0/47: 2, last CPU#0: [ 4671.355107] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4671.355450] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4671.355787] [ T48] locks held by khungtaskd/48: 1, last CPU#1: [ 4671.356110] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4671.356500] [ T48] locks held by check/66191: 3, on CPU#1: [ 4671.356833] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4671.357193] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4671.357568] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4671.357931] [ T48] locks held by kworker/1:0/67499: 4, on CPU#1: [ 4671.358285] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4671.358678] [ T48] #1: ffff888132427d10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4671.359068] [ T48] #2: ffff8881325dca70 (&helper->lock){+.+.}-{4:4}, at: drm_fb_helper_damage_work+0x175/0xac0 [drm_client_lib] [ 4671.359479] [ T48] #3: ffff8881333e0128 (&dev->master_mutex){+.+.}-{4:4}, at: drm_master_internal_acquire+0x1b/0x60 [drm] [ 4671.360318] [ T48] ============================================= [ 4794.208100] [ T48] INFO: task check:66191 blocked for more than 860 seconds. [ 4794.211144] [ T48] Not tainted 7.4.0-rc1 #487 [ 4794.215677] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4794.224293] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4794.229298] [ T48] Call Trace: [ 4794.234298] [ T48] [ 4794.237617] [ T48] __schedule+0x1d90/0x6ea0 [ 4794.239988] [ T48] ? __pfx___schedule+0x10/0x10 [ 4794.242296] [ T48] ? lock_acquire+0x1c1/0x340 [ 4794.244784] [ T48] ? schedule+0x24a/0x2e0 [ 4794.245819] [ T48] ? lock_release+0x1b5/0x340 [ 4794.246801] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4794.247868] [ T48] schedule+0xe3/0x2e0 [ 4794.248685] [ T48] schedule_timeout+0x1ac/0x290 [ 4794.249510] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4794.250158] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4794.250623] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4794.251035] [ T48] wait_for_completion+0x17a/0x400 [ 4794.251440] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4794.251893] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4794.252297] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4794.252766] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4794.253190] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4794.253640] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4794.254053] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4794.254476] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4794.254908] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4794.255353] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4794.255767] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4794.256195] [ T48] vfs_write+0x4b3/0xf40 [ 4794.256592] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4794.257031] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4794.257499] [ T48] ? lock_acquire+0x1b1/0x340 [ 4794.257931] [ T48] ksys_write+0x112/0x250 [ 4794.258364] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4794.258795] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4794.259198] [ T48] do_syscall_64+0xf2/0x690 [ 4794.259606] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4794.259980] [ T48] ? do_syscall_64+0x2d/0x690 [ 4794.260367] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4794.260764] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4794.261142] [ T48] ? do_syscall_64+0x60/0x690 [ 4794.261487] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4794.261855] [ T48] RIP: 0033:0x7fb94423d54e [ 4794.262230] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4794.262573] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4794.262918] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4794.263315] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4794.263639] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4794.263977] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4794.264341] [ T48] [ 4794.264694] [ T48] Showing all locks held in the system: [ 4794.265323] [ T48] locks held by pr/ttyS0/47: 2, last CPU#0: [ 4794.265648] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4794.266013] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4794.266377] [ T48] locks held by khungtaskd/48: 1, last CPU#3: [ 4794.266691] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4794.267074] [ T48] locks held by check/66191: 3, on CPU#1: [ 4794.267433] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4794.267836] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4794.268249] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4794.268636] [ T48] locks held by kworker/1:0/67499: 5, last CPU#1: [ 4794.268996] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4794.269437] [ T48] #1: ffff888132427d10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4794.269829] [ T48] #2: ffff888132427a30 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4794.270292] [ T48] #3: ffff888132427a58 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4794.270733] [ T48] #4: ffff8883ac6c63e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x30/0x170 [ 4794.271606] [ T48] ============================================= [ 4917.088498] [ T48] INFO: task check:66191 blocked for more than 983 seconds. [ 4917.091381] [ T48] Not tainted 7.4.0-rc1 #487 [ 4917.094687] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 4917.095130] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 4917.095578] [ T48] Call Trace: [ 4917.096050] [ T48] [ 4917.096474] [ T48] __schedule+0x1d90/0x6ea0 [ 4917.096919] [ T48] ? __pfx___schedule+0x10/0x10 [ 4917.097339] [ T48] ? lock_acquire+0x1c1/0x340 [ 4917.097747] [ T48] ? schedule+0x24a/0x2e0 [ 4917.098169] [ T48] ? lock_release+0x1b5/0x340 [ 4917.098574] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4917.099014] [ T48] schedule+0xe3/0x2e0 [ 4917.099436] [ T48] schedule_timeout+0x1ac/0x290 [ 4917.099848] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 4917.100378] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 4917.100841] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 4917.101259] [ T48] wait_for_completion+0x17a/0x400 [ 4917.101698] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 4917.102123] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 4917.102563] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 4917.103023] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4917.103465] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 4917.103922] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 4917.104337] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 4917.104794] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 4917.105350] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 4917.105815] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 4917.106244] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 4917.106643] [ T48] vfs_write+0x4b3/0xf40 [ 4917.107082] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 4917.107498] [ T48] ? __lock_acquire+0x54a/0x2490 [ 4917.107935] [ T48] ? lock_acquire+0x1b1/0x340 [ 4917.108345] [ T48] ksys_write+0x112/0x250 [ 4917.108765] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 4917.109159] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4917.109533] [ T48] do_syscall_64+0xf2/0x690 [ 4917.109934] [ T48] ? rcu_is_watching+0x12/0xb0 [ 4917.110315] [ T48] ? do_syscall_64+0x2d/0x690 [ 4917.110692] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 4917.111058] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 4917.111418] [ T48] ? do_syscall_64+0x60/0x690 [ 4917.111795] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 4917.112146] [ T48] RIP: 0033:0x7fb94423d54e [ 4917.112506] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 4917.112876] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 4917.113218] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 4917.113541] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 4917.113899] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 4917.114242] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 4917.114570] [ T48] [ 4917.114927] [ T48] Showing all locks held in the system: [ 4917.115548] [ T48] locks held by pr/ttyS0/47: 2, last CPU#0: [ 4917.115876] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 4917.116211] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 4917.116539] [ T48] locks held by khungtaskd/48: 1, last CPU#3: [ 4917.116908] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 4917.117360] [ T48] locks held by check/66191: 3, on CPU#1: [ 4917.117779] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 4917.118219] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 4917.118640] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 4917.119634] [ T48] locks held by kworker/3:1/67508: 4, on CPU#3: [ 4917.120083] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 4917.120552] [ T48] #1: ffff8881f7c6fd10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 4917.121046] [ T48] #2: ffff8881f7c6fa30 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4917.121530] [ T48] #3: ffff8881f7c6fa58 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0xdf/0x770 [drm_kms_helper] [ 4917.122488] [ T48] ============================================= [ 5039.968890] [ T48] INFO: task check:66191 blocked for more than 1105 seconds. [ 5039.971621] [ T48] Not tainted 7.4.0-rc1 #487 [ 5039.973962] [ T48] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5039.974377] [ T48] task:check state:D stack:0 pid:66191 tgid:66191 ppid:23692 task_flags:0x400140 flags:0x00080000 [ 5039.974837] [ T48] Call Trace: [ 5039.975271] [ T48] [ 5039.975690] [ T48] __schedule+0x1d90/0x6ea0 [ 5039.976159] [ T48] ? __pfx___schedule+0x10/0x10 [ 5039.976625] [ T48] ? lock_acquire+0x1c1/0x340 [ 5039.977093] [ T48] ? schedule+0x24a/0x2e0 [ 5039.977523] [ T48] ? lock_release+0x1b5/0x340 [ 5039.977911] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 5039.978365] [ T48] schedule+0xe3/0x2e0 [ 5039.978805] [ T48] schedule_timeout+0x1ac/0x290 [ 5039.979246] [ T48] ? __pfx_schedule_timeout+0x10/0x10 [ 5039.979690] [ T48] ? lockdep_hardirqs_on_prepare+0xd5/0x1b0 [ 5039.980120] [ T48] ? trace_hardirqs_on+0x14/0x190 [ 5039.980560] [ T48] wait_for_completion+0x17a/0x400 [ 5039.980980] [ T48] ? __pfx_wait_for_completion+0x10/0x10 [ 5039.981390] [ T48] ? _raw_spin_unlock_irqrestore+0x4c/0x60 [ 5039.981812] [ T48] __nvmet_passthru_ctrl_disable+0xcf/0x320 [nvmet] [ 5039.982303] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 5039.982805] [ T48] nvmet_passthru_ctrl_disable+0x24/0x40 [nvmet] [ 5039.983253] [ T48] ? __kasan_kmalloc+0x96/0xb0 [ 5039.983701] [ T48] nvmet_passthru_enable_store+0xa0/0x100 [nvmet] [ 5039.984148] [ T48] ? __pfx_nvmet_passthru_enable_store+0x10/0x10 [nvmet] [ 5039.984588] [ T48] ? configfs_write_iter+0x240/0x4a0 [ 5039.985000] [ T48] configfs_write_iter+0x2ad/0x4a0 [ 5039.985406] [ T48] ? __pfx_configfs_write_iter+0x10/0x10 [ 5039.985826] [ T48] vfs_write+0x4b3/0xf40 [ 5039.986231] [ T48] ? __pfx_vfs_write+0x10/0x10 [ 5039.986650] [ T48] ? __lock_acquire+0x54a/0x2490 [ 5039.987060] [ T48] ? lock_acquire+0x1b1/0x340 [ 5039.987474] [ T48] ksys_write+0x112/0x250 [ 5039.987867] [ T48] ? __pfx_ksys_write+0x10/0x10 [ 5039.988258] [ T48] ? rcu_is_watching+0x12/0xb0 [ 5039.988654] [ T48] do_syscall_64+0xf2/0x690 [ 5039.989033] [ T48] ? rcu_is_watching+0x12/0xb0 [ 5039.989405] [ T48] ? do_syscall_64+0x2d/0x690 [ 5039.989820] [ T48] ? trace_hardirqs_off_finish+0x139/0x180 [ 5039.990225] [ T48] ? lockdep_hardirqs_off+0xaf/0xf0 [ 5039.990670] [ T48] ? do_syscall_64+0x60/0x690 [ 5039.991070] [ T48] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 5039.991405] [ T48] RIP: 0033:0x7fb94423d54e [ 5039.991801] [ T48] RSP: 002b:00007ffef5d375a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 5039.992163] [ T48] RAX: ffffffffffffffda RBX: 00007fb9443be580 RCX: 00007fb94423d54e [ 5039.992547] [ T48] RDX: 0000000000000001 RSI: 000055c9e7267150 RDI: 0000000000000001 [ 5039.992919] [ T48] RBP: 00007ffef5d375b0 R08: 0000000000000000 R09: 0000000000000000 [ 5039.993270] [ T48] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 5039.993636] [ T48] R13: 0000000000000001 R14: 000055c9e7267150 R15: 0000000000000000 [ 5039.993986] [ T48] [ 5039.994312] [ T48] Showing all locks held in the system: [ 5039.994934] [ T48] locks held by pr/ttyS0/47: 2, last CPU#0: [ 5039.995237] [ T48] #0: ffffffff8b89ffd8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x45/0x60 [ 5039.995578] [ T48] #1: ffffffffa2730278 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x52/0xa0 [ 5039.995925] [ T48] locks held by khungtaskd/48: 1, last CPU#3: [ 5039.996249] [ T48] #0: ffffffff8b8b1e00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x39/0x180 [ 5039.996639] [ T48] locks held by check/66191: 3, on CPU#1: [ 5039.996972] [ T48] #0: ffff888142c0e478 (sb_writers#12){.+.+}-{0:0}, at: ksys_write+0x112/0x250 [ 5039.997331] [ T48] #1: ffff888144737e80 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x6d/0x4a0 [ 5039.997705] [ T48] #2: ffff88813c09b070 (&p->frag_sem){++++}-{4:4}, at: configfs_write_iter+0x1db/0x4a0 [ 5039.998073] [ T48] locks held by kworker/1:1/67542: 4, on CPU#1: [ 5039.998438] [ T48] #0: ffff888100194148 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1109/0x1760 [ 5039.998816] [ T48] #1: ffff8881a7bbfd10 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x8c0/0x1760 [ 5039.999247] [ T48] #2: ffff8881325dca70 (&helper->lock){+.+.}-{4:4}, at: drm_fb_helper_damage_work+0x175/0xac0 [drm_client_lib] [ 5039.999695] [ T48] #3: ffff8881333e0128 (&dev->master_mutex){+.+.}-{4:4}, at: drm_master_internal_acquire+0x1b/0x60 [drm] [ 5040.000606] [ T48] =============================================