INFO: task syz-executor.2:13223 blocked for more than 143 seconds. Not tainted 5.15.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27096 pid:13223 ppid: 9142 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 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:1176 [inline] io_wq_put_and_exit+0x4b2/0xd20 fs/io-wq.c:1211 io_uring_clean_tctx fs/io_uring.c:9675 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9755 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/0x2160 kernel/signal.c:2868 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:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f94e0f18739 RSP: 002b:00007f94de46e188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000800 RBX: 00007f94e101d038 RCX: 00007f94e0f18739 RDX: 0000000000000000 RSI: 0000000000006b46 RDI: 0000000000000006 RBP: 00007f94e0f72cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f94e101d038 R13: 00007fff6f22b1cf R14: 00007f94de46e300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b97d460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6457: #0: ffff88806d235d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc2-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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2963 Comm: systemd-journal Not tainted 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__kernel_text_address+0x89/0xc0 kernel/extable.c:106 Code: c0 48 81 fb 00 f0 a9 8e 72 0c 31 c0 48 81 fb a6 10 be 8e 0f 92 c0 5b c3 48 81 fb 00 f0 a9 8e 72 c9 48 81 fb a6 10 be 8e 73 c0 01 00 00 00 5b c3 e8 2b df e8 07 48 89 df e8 53 58 1f 00 84 c0 RSP: 0018:ffffc900020779e8 EFLAGS: 00000087 RAX: dffffc0000000000 RBX: ffffffff81bbcd19 RCX: 0000000000000000 RDX: 1ffff9200040ef4b RSI: ffffc90002077cf8 RDI: ffffffff81bbcd19 RBP: ffffc90002077a58 R08: ffffffff8df3050a R09: 0000000000000001 R10: fffff5200040ef4d R11: 0000000000086089 R12: ffffc90002077ac8 R13: 0000000000000000 R14: ffff8880137ee180 R15: 000000863312cd4e FS: 00007f21a5a6b8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f21a2f4e000 CR3: 00000000163ae000 CR4: 00000000001506e0 Call Trace: unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:313 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 save_stack+0x151/0x1e0 mm/page_owner.c:119 __reset_page_owner+0x5d/0x170 mm/page_owner.c:140 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3315 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3394 slab_destroy mm/slab.c:1627 [inline] slabs_destroy+0x89/0xc0 mm/slab.c:1647 cache_flusharray mm/slab.c:3418 [inline] ___cache_free+0x4c6/0x610 mm/slab.c:3480 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x4e/0x110 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x92/0xa0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc mm/slab.c:3323 [inline] kmem_cache_alloc+0x25f/0x540 mm/slab.c:3507 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags include/linux/audit.h:319 [inline] getname fs/namei.c:217 [inline] __do_sys_mkdir fs/namei.c:3931 [inline] __se_sys_mkdir fs/namei.c:3929 [inline] __x64_sys_mkdir+0xda/0x140 fs/namei.c:3929 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: 0033:0x7f21a4d26687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff00ef6788 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff00ef96a0 RCX: 00007f21a4d26687 RDX: 00007f21a5797a00 RSI: 00000000000001ed RDI: 000055a99d4698c0 RBP: 00007fff00ef67c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fff00ef96a0 R15: 00007fff00ef6cb0 ---------------- Code disassembly (best guess): 0: c0 48 81 fb rorb $0xfb,-0x7f(%rax) 4: 00 f0 add %dh,%al 6: a9 8e 72 0c 31 test $0x310c728e,%eax b: c0 48 81 fb rorb $0xfb,-0x7f(%rax) f: a6 cmpsb %es:(%rdi),%ds:(%rsi) 10: 10 be 8e 0f 92 c0 adc %bh,-0x3f6df072(%rsi) 16: 5b pop %rbx 17: c3 retq 18: 48 81 fb 00 f0 a9 8e cmp $0xffffffff8ea9f000,%rbx 1f: 72 c9 jb 0xffffffea 21: 48 81 fb a6 10 be 8e cmp $0xffffffff8ebe10a6,%rbx 28: 73 c0 jae 0xffffffea * 2a: b8 01 00 00 00 mov $0x1,%eax <-- trapping instruction 2f: 5b pop %rbx 30: c3 retq 31: e8 2b df e8 07 callq 0x7e8df61 36: 48 89 df mov %rbx,%rdi 39: e8 53 58 1f 00 callq 0x1f5891 3e: 84 c0 test %al,%al