audit: type=1804 audit(1566687029.697:53): pid=8679 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/syzcgroup/unified/syz3/bus" dev="sda1" ino=16693 res=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8636 Comm: syz-executor.4 Not tainted 4.14.139 #35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88807e7e6100 task.stack: ffff888052530000
RIP: 0010:kobject_uevent_env+0xa1/0xc23 lib/kobject_uevent.c:350
RSP: 0018:ffff8880525378c8 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc9000d671000
RDX: 0000000000000014 RSI: ffffffff86173acb RDI: ffffffff87078ed0
RBP: ffff888052537948 R08: ffff88807e7e6100 R09: 0000000000000003
R10: 0000000000000000 R11: ffff88807e7e6100 R12: 00000000000000a0
R13: 0000000000000002 R14: ffff88809585b0c0 R15: 00000000000000a0
FS:  00007f1021ad6700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32026000 CR3: 000000008e76a000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kobject_uevent+0x20/0x26 lib/kobject_uevent.c:553
 loop_clr_fd+0x4a7/0xae0 drivers/block/loop.c:1059
 __lo_release drivers/block/loop.c:1649 [inline]
 lo_release+0x112/0x1b0 drivers/block/loop.c:1667
 __blkdev_put+0x434/0x7f0 fs/block_dev.c:1791
 blkdev_put+0x88/0x510 fs/block_dev.c:1856
 blkdev_close+0x8b/0xb0 fs/block_dev.c:1863
 __fput+0x275/0x7a0 fs/file_table.c:210
 ____fput+0x16/0x20 fs/file_table.c:244
 task_work_run+0x114/0x190 kernel/task_work.c:113
 get_signal+0x18a8/0x1cd0 kernel/signal.c:2220
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459879
RSP: 002b:00007f1021ad5c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00007f1021ad66d4
R13: 00000000004bffb3 R14: 00000000004d1fa8 R15: 00000000ffffffff
Code: fa 83 e2 07 38 d0 7f 09 84 c0 74 05 e8 af 4f 6f fb 41 80 4f 3c 08 e8 a5 a2 45 fb 4c 89 fa b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a <80> 3c 02 00 74 08 4c 89 ff e8 47 4f 6f fb 49 8b 37 48 c7 c1 c0 
RIP: kobject_uevent_env+0xa1/0xc23 lib/kobject_uevent.c:350 RSP: ffff8880525378c8
---[ end trace d8aa6058e8c0d647 ]---