INFO: task syz-executor.0:10132 blocked for more than 143 seconds. Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:25752 pid:10132 ppid: 6541 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4987 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6268 schedule+0xd2/0x260 kernel/sched/core.c:6341 io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9846 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x60c/0x2b40 kernel/exit.c:787 do_group_exit+0x125/0x310 kernel/exit.c:929 get_signal+0x34c/0x28b0 kernel/signal.c:2837 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868 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: 0033:0x7efdc1ecfae9 RSP: 002b:00007efdbf445218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 00007efdc1fe2f68 RCX: 00007efdc1ecfae9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efdc1fe2f68 RBP: 00007efdc1fe2f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007efdc1fe2f6c R13: 00007ffd30a5bc1f R14: 00007efdbf445300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8bb83ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by systemd-journal/2967: #0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 1 lock held by in:imklog/6288: #0: ffff888014bb6d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-next-20211118-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:111 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xcb7/0xed0 kernel/hung_task.c:339 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: 2967 Comm: systemd-journal Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kernel_text_address+0x1a/0x80 kernel/extable.c:132 Code: 48 c7 c7 44 bc 90 8d e8 74 19 71 00 eb c3 66 90 55 48 89 fd 48 83 ec 08 e8 63 ff ff ff 85 c0 74 0b 48 83 c4 08 b8 01 00 00 00 <5d> c3 e8 8f b1 15 00 84 c0 74 1d 48 89 ef e8 33 6b 20 00 84 c0 75 RSP: 0018:ffffc9000276f9b0 EFLAGS: 00000292 RAX: 0000000000000001 RBX: ffffffff81be4d5e RCX: 0000000000000000 RDX: 1ffff920004edf46 RSI: 0000000000000001 RDI: ffffffff81be4d5e RBP: ffffffff81be4d5e R08: ffffffff8e1019fe R09: 0000000000000001 R10: fffff520004edf48 R11: 000000000008808a R12: ffffc9000276faa0 R13: 0000000000000000 R14: ffff88807a40d7c0 R15: ffff888080790000 FS: 00007f6f5cc6f8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f5a0b2018 CR3: 000000007a1cd000 CR4: 00000000003506e0 Call Trace: __kernel_text_address+0x9/0x30 kernel/extable.c:78 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:122 kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1749 slab_free mm/slub.c:3513 [inline] kmem_cache_free+0x92/0x5e0 mm/slub.c:3529 putname fs/namei.c:270 [inline] putname+0xfe/0x140 fs/namei.c:256 do_mkdirat+0x1cd/0x300 fs/namei.c:3918 __do_sys_mkdir fs/namei.c:3929 [inline] __se_sys_mkdir fs/namei.c:3927 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:3927 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: 0033:0x7f6f5bf2a687 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:00007ffe00bd5b48 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe00bd8bb0 RCX: 00007f6f5bf2a687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 00005653b25b18a0 RBP: 00007ffe00bd5b80 R08: 00005653b06533e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00005653b25b18a0 R15: 00007ffe00bd61c0 ---------------- Code disassembly (best guess): 0: 48 c7 c7 44 bc 90 8d mov $0xffffffff8d90bc44,%rdi 7: e8 74 19 71 00 callq 0x711980 c: eb c3 jmp 0xffffffd1 e: 66 90 xchg %ax,%ax 10: 55 push %rbp 11: 48 89 fd mov %rdi,%rbp 14: 48 83 ec 08 sub $0x8,%rsp 18: e8 63 ff ff ff callq 0xffffff80 1d: 85 c0 test %eax,%eax 1f: 74 0b je 0x2c 21: 48 83 c4 08 add $0x8,%rsp 25: b8 01 00 00 00 mov $0x1,%eax * 2a: 5d pop %rbp <-- trapping instruction 2b: c3 retq 2c: e8 8f b1 15 00 callq 0x15b1c0 31: 84 c0 test %al,%al 33: 74 1d je 0x52 35: 48 89 ef mov %rbp,%rdi 38: e8 33 6b 20 00 callq 0x206b70 3d: 84 c0 test %al,%al 3f: 75 .byte 0x75