audit: type=1804 audit(1677572743.022:5): pid=9697 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3370097028/syzkaller.a0FTyw/0/file0/bus" dev="loop4" ino=41 res=1 XFS (loop0): Unmounting Filesystem ------------[ cut here ]------------ XFS (loop5): Unmounting Filesystem WARNING: CPU: 1 PID: 8155 at kernel/workqueue.c:4212 destroy_workqueue.cold+0x38/0x7d kernel/workqueue.c:4212 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8155 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:destroy_workqueue.cold+0x38/0x7d kernel/workqueue.c:4212 Code: c6 00 00 0f 0b 48 8b 7c 24 08 e8 95 92 25 00 e8 d0 b6 4b f9 e9 de c2 4b f9 e8 16 95 6f f9 48 c7 c7 80 3f 69 88 e8 75 c6 00 00 <0f> 0b e8 03 95 6f f9 48 8b 7c 24 08 e8 69 92 25 00 e8 a4 b6 4b f9 RSP: 0018:ffff8880af547cc8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1015ea8f8b RBP: 000000000000000f R08: 0000000000000024 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880984b3a40 R13: dffffc0000000000 R14: ffffe8ffffde7c00 R15: 0000000000000000 xfs_destroy_mount_workqueues+0xef/0x1c0 fs/xfs/xfs_super.c:903 xfs_fs_put_super+0xc4/0x130 fs/xfs/xfs_super.c:1779 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 audit: type=1804 audit(1677572743.242:6): pid=9704 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1651952194/syzkaller.2STrXO/0/file0/bus" dev="loop2" ino=41 res=1 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe audit: type=1804 audit(1677572743.252:7): pid=9716 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir1651952194/syzkaller.2STrXO/0/file0/bus" dev="loop2" ino=41 res=1 RIP: 0033:0x7ff04387f567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff51cbd3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 audit: type=1804 audit(1677572743.252:8): pid=9713 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir1651952194/syzkaller.2STrXO/0/file0/bus" dev="loop2" ino=41 res=1 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff04387f567 audit: type=1804 audit(1677572743.252:9): pid=9712 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir1651952194/syzkaller.2STrXO/0/file0/bus" dev="loop2" ino=41 res=1 RDX: 00007fff51cbd4a9 RSI: 000000000000000a RDI: 00007fff51cbd4a0 RBP: 00007fff51cbd4a0 R08: 00000000ffffffff R09: 00007fff51cbd270 R10: 000055555572a903 R11: 0000000000000246 R12: 00007ff0438d8b24 R13: 00007fff51cbe560 R14: 000055555572a810 R15: 00007fff51cbe5a0 Kernel Offset: disabled Rebooting in 86400 seconds..