INFO: task syz-executor.5:25575 blocked for more than 143 seconds. Not tainted 5.16.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:22064 pid:25575 ppid: 8060 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6253 schedule+0x12b/0x1f0 kernel/sched/core.c:6326 io_uring_cancel_generic+0x5b3/0x661 fs/io_uring.c:9846 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x281/0x24f0 kernel/exit.c:787 do_group_exit+0x168/0x2d0 kernel/exit.c:929 get_signal+0x1740/0x2120 kernel/signal.c:2852 arch_do_signal_or_restart+0x9c/0x730 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+0x191/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f738db5bae9 RSP: 002b:00007f738b0d1218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 00007f738dc6ef68 RCX: 00007f738db5bae9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f738dc6ef68 RBP: 00007f738dc6ef60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f738dc6ef6c R13: 00007ffd65e6914f R14: 00007f738b0d1300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1dd40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by in:imklog/6218: #0: ffff88807ba8c370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990 5 locks held by kworker/u4:6/8819: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-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+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295 kthread+0x468/0x490 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2970 Comm: systemd-journal Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tomoyo_cred_prepare+0x0/0x190 security/tomoyo/tomoyo.c:38 Code: 5d 41 5e 41 5f 5d c3 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 67 ff ff ff 4c 89 e7 e8 1b d4 f1 fd e9 5a ff ff ff 66 0f 1f 44 00 00 <55> 41 57 41 56 41 55 41 54 53 48 bd 00 00 00 00 00 fc ff df e8 a7 RSP: 0018:ffffc90001d5fd98 EFLAGS: 00000246 RAX: 1ffffffff18b7ddd RBX: ffffffff8c5beed0 RCX: ffff88807a593a00 RDX: 0000000000400cc0 RSI: ffff88807a6e4300 RDI: ffff88801cdd5300 RBP: ffffffff8c5beee8 R08: ffffffff83d85121 R09: ffffc90001d5fb2c R10: fffffbfff1bfd166 R11: 0000000000000000 R12: ffff88807a6e4300 R13: ffff88801cdd5300 R14: dffffc0000000000 R15: 0000000000400cc0 FS: 00007f5d5ad2f8c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d58246000 CR3: 000000007a6f3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: security_prepare_creds+0xc6/0x220 security/security.c:1697 prepare_creds+0x452/0x640 kernel/cred.c:291 access_override_creds fs/open.c:351 [inline] do_faccessat+0xec/0x940 fs/open.c:415 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f5d59fea9c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff80b0b708 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007fff80b0e730 RCX: 00007f5d59fea9c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055d79a8889a3 RBP: 00007fff80b0b850 R08: 000055d79a87e3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055d79ae218a0 R15: 00007fff80b0bd40 ---------------- Code disassembly (best guess): 0: 5d pop %rbp 1: 41 5e pop %r14 3: 41 5f pop %r15 5: 5d pop %rbp 6: c3 retq 7: 44 89 e1 mov %r12d,%ecx a: 80 e1 07 and $0x7,%cl d: fe c1 inc %cl f: 38 c1 cmp %al,%cl 11: 0f 8c 67 ff ff ff jl 0xffffff7e 17: 4c 89 e7 mov %r12,%rdi 1a: e8 1b d4 f1 fd callq 0xfdf1d43a 1f: e9 5a ff ff ff jmpq 0xffffff7e 24: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 2a: 55 push %rbp <-- trapping instruction 2b: 41 57 push %r15 2d: 41 56 push %r14 2f: 41 55 push %r13 31: 41 54 push %r12 33: 53 push %rbx 34: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp 3b: fc ff df 3e: e8 .byte 0xe8 3f: a7 cmpsl %es:(%rdi),%ds:(%rsi)