bisecting fixing commit since 87335852c5d9ec629f80bb2257b9a9945962b719
building syzkaller on a0092f9dfdd33924abe5cf5565e4ec4748217c7b
testing commit 87335852c5d9ec629f80bb2257b9a9945962b719 with gcc (GCC) 8.1.0
kernel signature: c2ede21fb30f615fe835879850af18166f6799eeb5f577c5c98c18deb4c3cebe
run #0: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #1: crashed: WARNING in pm_qos_remove_request
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 pm_qos_remove_request
run #5: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync
run #6: crashed: WARNING in pm_qos_remove_request
run #7: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync
run #8: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #9: crashed: WARNING in pm_qos_remove_request
testing current HEAD 1752938529c614a8ed4432ecce6ebc95d3b87207
testing commit 1752938529c614a8ed4432ecce6ebc95d3b87207 with gcc (GCC) 8.1.0
kernel signature: c55cbf18bcf8c92aba015e760432b2b5131a5d39ebf58ce41c0356cf33115642
run #0: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync
run #1: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #2: crashed: WARNING in pm_qos_remove_request
run #3: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync
run #4: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync
run #5: crashed: BUG: unable to handle kernel paging request in pm_qos_update_target
run #6: crashed: INFO: trying to register non-static key in cancel_delayed_work_sync
run #7: crashed: WARNING in pm_qos_remove_request
run #8: crashed: WARNING in pm_qos_remove_request
run #9: crashed: WARNING in pm_qos_remove_request
revisions tested: 2, total time: 23m28.997007078s (build: 15m45.071550807s, test: 7m13.455839633s)
the crash still happens on HEAD
commit msg: Linux 4.14.213
crash: WARNING in pm_qos_remove_request
pm_qos_remove_request() called for unknown object
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7256 at kernel/power/qos.c:534 pm_qos_remove_request.cold.3+0xc/0x13 kernel/power/qos.c:534
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7256 Comm: syz-executor.4 Not tainted 4.14.213-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14b/0x1f1 lib/dump_stack.c:58
 panic+0x1b0/0x358 kernel/panic.c:183
 __warn.cold.7+0x25/0x2c kernel/panic.c:547
 report_bug+0x1a4/0x1f3 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:pm_qos_remove_request.cold.3+0xc/0x13 kernel/power/qos.c:534
RSP: 0018:ffff8880902c7be8 EFLAGS: 00010282
RAX: 0000000000000031 RBX: ffff8882354dfb40 RCX: 0000000000000000
RDX: 0000000000000031 RSI: ffffffff878b9120 RDI: ffffed1012058f74
RBP: ffff8880902c7c18 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000000 R12: 1ffff11012058f8d
R13: ffff8882354dfb00 R14: ffff8880afbcc0c0 R15: ffff8882354dfb68
 snd_pcm_hw_free sound/core/pcm_native.c:790 [inline]
 snd_pcm_common_ioctl+0xac7/0x1bf0 sound/core/pcm_native.c:2919
 snd_pcm_ioctl+0x66/0xb0 sound/core/pcm_native.c:2998
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45deb9
RSP: 002b:00007f34cd845c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000175c0 RCX: 000000000045deb9
RDX: 0000000000000000 RSI: 0000000000004112 RDI: 0000000000000004
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffcccbb24cf R14: 00007f34cd8469c0 R15: 000000000118bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..