INFO: task syz-executor.1:14523 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28432 pid:14523 ppid: 8399 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 schedule_timeout+0x43/0x250 kernel/time/timer.c:1868 do_wait_for_common+0x266/0x3a0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 io_sq_thread_park fs/io_uring.c:7115 [inline] io_uring_cancel_task_requests+0x229/0x1a90 fs/io_uring.c:8745 __io_uring_files_cancel+0x102/0x320 fs/io_uring.c:8840 io_uring_files_cancel include/linux/io_uring.h:47 [inline] do_exit+0x258/0x2340 kernel/exit.c:780 do_group_exit+0x168/0x2d0 kernel/exit.c:922 get_signal+0x1734/0x1ef0 kernel/signal.c:2773 arch_do_signal_or_restart+0x3c/0x610 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0xac/0x1e0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f7d79c72218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056bf68 RCX: 0000000000465ef9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf68 RBP: 000000000056bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf6c R13: 00007ffccc91a5ef R14: 00007f7d79c72300 R15: 0000000000022000 INFO: task iou-sqp-14523:14525 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:iou-sqp-14523 state:D stack:30160 pid:14525 ppid: 8399 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 schedule_timeout+0x43/0x250 kernel/time/timer.c:1868 do_wait_for_common+0x266/0x3a0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 io_sq_thread+0x25c/0x1460 fs/io_uring.c:6717 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task iou-sqp-14523:14528 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:iou-sqp-14523 state:D stack:30160 pid:14528 ppid: 8399 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 schedule_timeout+0x43/0x250 kernel/time/timer.c:1868 do_wait_for_common+0x266/0x3a0 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 io_sq_thread+0x25c/0x1460 fs/io_uring.c:6717 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 1 lock held by khungtaskd/1629: #0: ffffffff8c70fcc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8065: #0: ffff8880271500f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 1 lock held by syz-executor.1/14523: #0: ffff888028480870 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7108 [inline] #0: ffff888028480870 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x1b4/0x1a90 fs/io_uring.c:8745 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1629 Comm: khungtaskd Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x125/0x19e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4827 Comm: systemd-journal Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fpregs_assert_state_consistent+0x0/0xe0 arch/x86/kernel/fpu/core.c:417 Code: 03 38 c1 0f 8c d2 fe ff ff 4c 89 ef e8 69 f5 90 00 e9 c5 fe ff ff e8 3f 19 24 08 e8 8a b9 4c 00 48 0f ae 0b e9 3e ff ff ff 90 <55> 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df e8 6b b9 4c 00 65 RSP: 0018:ffffc9000149ff00 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888011db5340 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000149ff58 RBP: 0000000000000000 R08: ffffffff817e7060 R09: fffffbfff1b6adc6 R10: fffffbfff1b6adc6 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffc9000149ff58 R15: ffff888011db5340 FS: 00007f64123698c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f640f7f0000 CR3: 0000000025aa9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_exit_to_user_mode_prepare arch/x86/include/asm/entry-common.h:55 [inline] exit_to_user_mode_prepare+0x134/0x1e0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6411601f17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007fffae78c458 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: 00000000000012db RBX: 00005646ee3e61e0 RCX: 00007f6411601f17 RDX: 0000000000000000 RSI: 000000001900e709 RDI: 00005646ee3e61e0 RBP: 00000000000012db R08: 00007fffae7df080 R09: 0000000000000070 R10: 00007fffae7df118 R11: 0000000000000202 R12: ffffffffffffffff R13: 00007fffae78c508 R14: 00005646ecc8d958 R15: 0005bcb5f317523a