bisecting fixing commit since dda0e2920330128e0dbdeb11c8f25031aa40b11c
building syzkaller on 17a986e54c507287c078a70fa9eea0be9f191f84
testing commit dda0e2920330128e0dbdeb11c8f25031aa40b11c with gcc (GCC) 8.1.0
kernel signature: 6c2b2e931abfc8d615ddd54b8e582c08a6e04c2ece31aadfc04e3faa09452a84
run #0: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #1: crashed: WARNING in cancel_delayed_work_sync
run #2: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #3: crashed: WARNING in pm_qos_remove_request
run #4: crashed: WARNING in cancel_delayed_work_sync
run #5: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #6: crashed: WARNING in cancel_delayed_work_sync
run #7: crashed: BUG: corrupted list in pm_qos_update_target
run #8: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #9: crashed: WARNING in cancel_delayed_work_sync
testing current HEAD 67957f12548c785d0e0b14fd104d2297f3a71835
testing commit 67957f12548c785d0e0b14fd104d2297f3a71835 with gcc (GCC) 8.1.0
kernel signature: 0b480f3e0186a3b7334b5553012e539b87395d060d598c31f8687833f6eebd7c
run #0: crashed: WARNING in pm_qos_remove_request
run #1: crashed: WARNING in cancel_delayed_work_sync
run #2: crashed: WARNING in cancel_delayed_work_sync
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
revisions tested: 2, total time: 36m33.400981069s (build: 20m37.323062427s, test: 13m57.010402827s)
the crash still happens on HEAD
commit msg: Linux 4.19.144
crash: WARNING in cancel_delayed_work_sync
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 1 PID: 24860 at kernel/workqueue.c:2919 __flush_work.cold.49+0x21/0x2a kernel/workqueue.c:2919
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 24860 Comm: syz-executor072 Not tainted 4.19.144-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+0x123/0x177 lib/dump_stack.c:118
 panic+0x1cd/0x375 kernel/panic.c:186
 __warn.cold.8+0x1b/0x3e kernel/panic.c:541
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__flush_work.cold.49+0x21/0x2a kernel/workqueue.c:2919
Code: 0e 00 0f 0b e9 41 ff fe ff 48 c7 c7 a0 0d 29 87 e8 50 4a 0e 00 0f 0b 31 c0 e9 40 1a ff ff 48 c7 c7 a0 0d 29 87 e8 3b 4a 0e 00 <0f> 0b 31 c0 e9 2b 1a ff ff 48 c7 c7 a0 0d 29 87 e8 26 4a 0e 00 0f
RSP: 0018:ffff888070417940 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff8882161392b0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff876797c0 RDI: ffffffff8a18e960
RBP: ffff888070417a68 R08: ffffed1015d65079 R09: ffffed1015d65078
R10: ffffed1015d65078 R11: ffff8880aeb283c7 R12: 1ffff1100e082f2c
R13: ffff888070417a40 R14: ffff8882161392c8 R15: 0000000000000001
 __cancel_work_timer+0x2f1/0x430 kernel/workqueue.c:3015
 cancel_delayed_work_sync+0xe/0x10 kernel/workqueue.c:3147
 pm_qos_remove_request+0x56/0x350 kernel/power/qos.c:539
 snd_pcm_hw_free sound/core/pcm_native.c:822 [inline]
 snd_pcm_common_ioctl+0xaab/0x1af0 sound/core/pcm_native.c:2901
 snd_pcm_ioctl+0x66/0xb0 sound/core/pcm_native.c:2980
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688
 ksys_ioctl+0x62/0x90 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44a6a9
Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 fb ca fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb5d44c4db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 000000000044a6a9
RDX: 0000000000000000 RSI: 0000000000004112 RDI: 0000000000000004
RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c
R13: 00007fffeb7091ef R14: 00007fb5d44c59c0 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..