REISERFS warning (device loop3): sh-2021 reiserfs_fill_super: can not find reiserfs on loop3
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
REISERFS warning (device loop2): sh-2006 read_super_block: bread failed (dev loop2, block 2, size 4096)
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 21297 Comm: syz-executor4 Not tainted 4.20.0-rc1-next-20181107+ #107
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567
Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40
REISERFS warning (device loop2): sh-2006 read_super_block: bread failed (dev loop2, block 16, size 4096)
RSP: 0018:ffff88017b50f880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d
RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb
RBP: ffff88017b50fa60 R08: ffff8801b97520c0 R09: ffffed003b5c5b67
R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801836e5a00
R13: ffff88017b50f8f8 R14: 1ffff1002f6a1f13 R15: dffffc0000000000
FS:  0000000001489940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
REISERFS warning (device loop2): sh-2021 reiserfs_fill_super: can not find reiserfs on loop2
CR2: 00007f9a857e29de CR3: 000000018539f000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 locks_remove_file+0x148/0x5c0 fs/locks.c:2607
 __fput+0x2f0/0xa70 fs/file_table.c:271
 ____fput+0x15/0x20 fs/file_table.c:312
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411021
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffe75b6d300 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411021
RDX: 0000000000000001 RSI: 0000000000730f20 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffe75b6d230 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000bd0 R15: 0000000000000004
Modules linked in:
---[ end trace 17f35f2dea1028c2 ]---
RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567
kobject: 'kvm' (0000000091a5c586): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (000000000c239b08): kobject_uevent_env
kobject: 'loop0' (000000006deb26ad): kobject_uevent_env
kobject: 'loop3' (000000000c239b08): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000006deb26ad): fill_kobj_path: path = '/devices/virtual/block/loop0'
Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40
kobject: 'kvm' (0000000091a5c586): kobject_uevent_env
RSP: 0018:ffff88017b50f880 EFLAGS: 00010202
kobject: 'kvm' (0000000091a5c586): fill_kobj_path: path = '/devices/virtual/misc/kvm'
RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d
kobject: 'loop0' (000000006deb26ad): kobject_uevent_env
kobject: 'loop2' (00000000232cd211): kobject_uevent_env
kobject: 'loop0' (000000006deb26ad): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000232cd211): fill_kobj_path: path = '/devices/virtual/block/loop2'
RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb
RBP: ffff88017b50fa60 R08: ffff8801b97520c0 R09: ffffed003b5c5b67
R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801836e5a00
kobject: 'kvm' (0000000091a5c586): kobject_uevent_env
R13: ffff88017b50f8f8 R14: 1ffff1002f6a1f13 R15: dffffc0000000000
kobject: 'kvm' (0000000091a5c586): fill_kobj_path: path = '/devices/virtual/misc/kvm'
FS:  0000000001489940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
kobject: 'loop3' (000000000c239b08): kobject_uevent_env
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop3' (000000000c239b08): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000232cd211): kobject_uevent_env
CR2: 00000000009f9058 CR3: 000000018539f000 CR4: 00000000001426e0
REISERFS warning (device loop3): sh-2021 reiserfs_fill_super: can not find reiserfs on loop3
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'loop2' (00000000232cd211): fill_kobj_path: path = '/devices/virtual/block/loop2'
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400