INFO: task syz-executor.1:8669 blocked for more than 143 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27992 pid: 8669 ppid: 6531 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 io_wq_exit_workers fs/io-wq.c:1174 [inline] io_wq_put_and_exit+0x4b2/0xd20 fs/io-wq.c:1209 io_uring_clean_tctx fs/io_uring.c:9724 [inline] io_uring_cancel_generic+0x616/0x760 fs/io_uring.c:9804 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x265/0x2a30 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x21d0 kernel/signal.c:2855 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff5ce74da39 RSP: 002b:00007ff5cbca2188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 00000000000002ef RBX: 00007ff5ce851020 RCX: 00007ff5ce74da39 RDX: 0000000000000000 RSI: 00000000000002ef RDI: 0000000000000003 RBP: 00007ff5ce7a7e8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3dc942bf R14: 00007ff5cbca2300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b981b20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6210: #0: ffff88801a9de370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 2 locks held by rs:main Q:Reg/6212: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 249 Comm: kworker/u4:3 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: 0x0 (phy5) RIP: 0010:mark_lock+0x168/0x17b0 kernel/locking/lockdep.c:4612 Code: b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 c7 43 10 00 00 00 00 48 8b 84 24 10 01 00 00 <65> 48 2b 04 25 28 00 00 00 0f 85 c3 11 00 00 48 81 c4 18 01 00 00 RSP: 0018:ffffc9000243f8a0 EFLAGS: 00000086 RAX: 4ddbd72335531e00 RBX: fffff52000487f1b RCX: 1ffffffff1f9ffca RDX: dffffc0000000000 RSI: 0000000000000100 RDI: ffffffff8fcffe50 RBP: 0000000000000100 R08: 0000000000000000 R09: ffffffff8fcff9e7 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000008 R13: ffff888018690a48 R14: 0000000000000000 R15: ffff888018690a68 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f38d8012180 CR3: 000000007058a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: mark_usage kernel/locking/lockdep.c:4514 [inline] __lock_acquire+0x8a7/0x54a0 kernel/locking/lockdep.c:4969 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 debug_object_deactivate lib/debugobjects.c:735 [inline] debug_object_deactivate+0x101/0x300 lib/debugobjects.c:723 debug_work_deactivate kernel/workqueue.c:513 [inline] process_one_work+0x399/0x16b0 kernel/workqueue.c:2227 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: b8 00 00 00 00 mov $0x0,%eax 5: 00 fc add %bh,%ah 7: ff (bad) 8: df 48 01 fisttps 0x1(%rax) b: c3 retq c: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 13: c7 43 08 00 00 00 00 movl $0x0,0x8(%rbx) 1a: 48 c7 43 10 00 00 00 movq $0x0,0x10(%rbx) 21: 00 22: 48 8b 84 24 10 01 00 mov 0x110(%rsp),%rax 29: 00 * 2a: 65 48 2b 04 25 28 00 sub %gs:0x28,%rax <-- trapping instruction 31: 00 00 33: 0f 85 c3 11 00 00 jne 0x11fc 39: 48 81 c4 18 01 00 00 add $0x118,%rsp