INFO: task syz-executor.5:20323 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28744 pid:20323 ppid: 7415 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6250 schedule+0xd2/0x260 kernel/sched/core.c:6323 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740 io_ring_ctx_wait_and_kill+0x72/0x322 fs/io_uring.c:9527 io_uring_release+0x42/0x46 fs/io_uring.c:9556 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/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: 0033:0x7fecb0b57b32 RSP: 002b:00007fecae0ac0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 RAX: 0000000020ffd000 RBX: 0000000000008011 RCX: 00007fecb0b57b32 RDX: 0000000000000003 RSI: 0000000000100000 RDI: 0000000020ffd000 RBP: 0000000020ffd000 R08: 0000000000000003 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000140 R13: 0000000020ffd000 R14: 0000000020000100 R15: 0000000020002000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461 1 lock held by in:imklog/6194: 2 locks held by kworker/1:2/8421: #0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 #1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x173/0x490 kernel/sched/psi.c:871 1 lock held by syz-executor.5/20317: 1 lock held by syz-executor.5/20323: #0: ffff88807e93b0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_ctx_wait_and_kill+0x72/0x322 fs/io_uring.c:9527 1 lock held by syz-executor.5/20391: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2937 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:173 [inline] RIP: 0010:unwind_next_frame+0x32a/0x1ce0 arch/x86/kernel/unwind_orc.c:443 Code: 48 8d bc 3f 6c 38 e5 8d 48 81 ff c8 78 87 8e 0f 87 d8 10 00 00 48 8d 3c 85 84 0d 79 8d 29 ca 4c 89 ce 4c 89 f9 e8 96 f5 ff ff <49> 89 c0 4d 85 c0 0f 84 39 02 00 00 4d 8d 78 04 48 b8 00 00 00 00 RSP: 0018:ffffc90001b4f5f8 EFLAGS: 00000286 RAX: ffffffff8e822c5c RBX: 1ffff92000369ec7 RCX: ffffffff89400067 RDX: 0000000000000000 RSI: ffffffff8e822c56 RDI: ffffffff8de1b020 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8e822c56 R10: fffff52000369ee5 R11: 0000000000086089 R12: ffffc90001b4f718 R13: ffffc90001b4f705 R14: ffffc90001b4f6d0 R15: ffffffff89400067 FS: 00007ff95d1208c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff9588fb000 CR3: 000000007d50a000 CR4: 00000000003526e0 Call Trace: arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3234 [inline] slab_alloc mm/slub.c:3242 [inline] kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247 kmem_cache_zalloc include/linux/slab.h:714 [inline] __alloc_file+0x21/0x280 fs/file_table.c:101 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0xe4/0x2740 fs/namei.c:3545 do_filp_open+0x1aa/0x400 fs/namei.c:3586 do_sys_openat2+0x16d/0x4d0 fs/open.c:1212 do_sys_open fs/open.c:1228 [inline] __do_sys_open fs/open.c:1236 [inline] __se_sys_open fs/open.c:1232 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1232 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff95c6af840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fff3595a2b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fff3595a5c0 RCX: 00007ff95c6af840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055cf7d66a7c0 RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055cf7d65d040 R14: 00007fff3595a580 R15: 000055cf7d66a5e0 ---------------- Code disassembly (best guess): 0: 48 8d bc 3f 6c 38 e5 lea -0x721ac794(%rdi,%rdi,1),%rdi 7: 8d 8: 48 81 ff c8 78 87 8e cmp $0xffffffff8e8778c8,%rdi f: 0f 87 d8 10 00 00 ja 0x10ed 15: 48 8d 3c 85 84 0d 79 lea -0x7286f27c(,%rax,4),%rdi 1c: 8d 1d: 29 ca sub %ecx,%edx 1f: 4c 89 ce mov %r9,%rsi 22: 4c 89 f9 mov %r15,%rcx 25: e8 96 f5 ff ff callq 0xfffff5c0 * 2a: 49 89 c0 mov %rax,%r8 <-- trapping instruction 2d: 4d 85 c0 test %r8,%r8 30: 0f 84 39 02 00 00 je 0x26f 36: 4d 8d 78 04 lea 0x4(%r8),%r15 3a: 48 rex.W 3b: b8 00 00 00 00 mov $0x0,%eax