INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 12198 Comm: syz-executor1 Not tainted 4.15.0-rc3-next-20171214+ #67
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+0xe9/0x14b lib/dump_stack.c:53
register_lock_class+0x164/0x5d0 kernel/locking/lockdep.c:752
__lock_acquire+0xb4/0x1430 kernel/locking/lockdep.c:3314
lock_acquire+0xbf/0x220 kernel/locking/lockdep.c:3914
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:152
__wake_up_common_lock+0x51/0x90 kernel/sched/wait.c:124
__wake_up+0xe/0x10 kernel/sched/wait.c:149
sbitmap_queue_wake_all+0x5d/0x80 lib/sbitmap.c:493
blk_mq_tag_wakeup_all+0x1b/0x40 block/blk-mq-tag.c:41
blk_mq_wake_waiters+0x60/0x80 block/blk-mq.c:259
blk_set_queue_dying+0x6e/0x130 block/blk-core.c:633
blk_cleanup_queue+0x33/0x2d0 block/blk-core.c:665
loop_remove+0x19/0x50 drivers/block/loop.c:1861
loop_control_ioctl+0x19a/0x1a0 drivers/block/loop.c:1960
vfs_ioctl fs/ioctl.c:46 [inline]
do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007fb876480c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000013
RBP: 00000000000003cd R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2bd8
R13: 00000000ffffffff R14: 00007fb8764816d4 R15: 0000000000000000
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: __wake_up_common+0x49/0x150 kernel/sched/wait.c:87
PGD 2137b3067 P4D 2137b3067 PUD 1f957a067 PMD 0
Oops: 0000 [#1] SMP
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 12198 Comm: syz-executor1 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__wake_up_common+0x49/0x150 kernel/sched/wait.c:87
RSP: 0018:ffffc90000d8fcb0 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffff8801f97f1808 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8801f97f1808
RBP: ffffc90000d8fcf8 R08: ffffffffffffffe8 R09: ffffc90000d8fd10
R10: ffffc90000d8fc70 R11: 0000000000000000 R12: ffff8801f97f1840
R13: ffffc90000d8fd10 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb876481700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001f9579006 CR4: 00000000001606e0
Call Trace:
__wake_up_common_lock+0x6c/0x90 kernel/sched/wait.c:125
__wake_up+0xe/0x10 kernel/sched/wait.c:149
sbitmap_queue_wake_all+0x5d/0x80 lib/sbitmap.c:493
blk_mq_tag_wakeup_all+0x1b/0x40 block/blk-mq-tag.c:41
blk_mq_wake_waiters+0x60/0x80 block/blk-mq.c:259
blk_set_queue_dying+0x6e/0x130 block/blk-core.c:633
blk_cleanup_queue+0x33/0x2d0 block/blk-core.c:665
loop_remove+0x19/0x50 drivers/block/loop.c:1861
loop_control_ioctl+0x19a/0x1a0 drivers/block/loop.c:1960
vfs_ioctl fs/ioctl.c:46 [inline]
do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007fb876480c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000013
RBP: 00000000000003cd R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2bd8
R13: 00000000ffffffff R14: 00007fb8764816d4 R15: 0000000000000000
Code: 4d d0 4c 89 45 c8 74 0a 41 f6 01 04 0f 85 8d 00 00 00 49 8b 44 24 38 4c 8d 40 e8 49 8d 40 18 49 83 c4 38 89 55 c0 49 39 c4 74 4c <49> 8b 40 18 31 db 4c 8d 78 e8 45 8b 30 41 f6 c6 04 75 4b 48 8b
RIP: __wake_up_common+0x49/0x150 kernel/sched/wait.c:87 RSP: ffffc90000d8fcb0
CR2: 0000000000000000
---[ end trace d40feedfdfad4774 ]---