WARNING: CPU: 0 PID: 11886 at kernel/workqueue.c:1384 __queue_work+0xc8d/0x1100 kernel/workqueue.c:1384 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11886 Comm: syz-executor.4 Not tainted 4.19.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 audit: type=1804 audit(1610484966.075:158): pid=11881 uid=0 auid=0 ses=4 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir898598820/syzkaller.xfbKNT/87/file0" dev="sda1" ino=16077 res=1 __warn.cold+0x20/0x61 kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:186 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:__queue_work+0xc8d/0x1100 kernel/workqueue.c:1384 Code: 03 38 d0 7c 09 84 d2 74 05 e8 df b7 5b 00 8b 5b 24 31 ff 83 e3 20 89 de e8 10 91 25 00 85 db 0f 85 c2 00 00 00 e8 93 8f 25 00 <0f> 0b e9 5d f9 ff ff e8 87 8f 25 00 4c 8d 75 60 41 83 cd 02 e9 11 RSP: 0018:ffff88805f4ef788 EFLAGS: 00010046 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000e471000 audit: type=1804 audit(1610484966.075:159): pid=11885 uid=0 auid=0 ses=4 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir898598820/syzkaller.xfbKNT/87/file0" dev="sda1" ino=16077 res=1 RDX: 0000000000040000 RSI: ffffffff813f426d RDI: 0000000000000005 RBP: 0000000000010000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a9a9e828 R13: ffff888092f0ba40 R14: 0000000000000000 R15: 0000000000000008 queue_work_on+0x17e/0x1f0 kernel/workqueue.c:1488 l2cap_do_send+0x300/0x480 net/bluetooth/l2cap_core.c:915 l2cap_chan_send+0x2831/0x3be0 net/bluetooth/l2cap_core.c:2544 l2cap_sock_sendmsg+0x235/0x2f0 net/bluetooth/l2cap_sock.c:974 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:632 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2115 __sys_sendmmsg+0x195/0x470 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2236 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f53c84bcc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e219 RDX: 0000000000000500 RSI: 0000000020003f00 RDI: 0000000000000005 RBP: 000000000119bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fffd77fcc0f R14: 00007f53c84bd9c0 R15: 000000000119bf8c Kernel Offset: disabled Rebooting in 86400 seconds..