kasan: CONFIG_KASAN_INLINE enabled
UDF-fs: error (device loop4): udf_read_tagged: read failed, block=256, location=256
kasan: GPF could be caused by NULL-ptr deref or user memory access
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop5): udf_read_tagged: read failed, block=256, location=256
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 15795 Comm: syz-executor2 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
RSP: 0018:ffff880182b8f880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d
RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb
RBP: ffff880182b8fa60 R08: ffff88015845e440 R09: ffffed003b5c5b67
R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801bdfd4500
R13: ffff880182b8f8f8 R14: 1ffff10030571f13 R15: dffffc0000000000
FS:  0000000000ca0940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e82a000 CR3: 00000001d306a000 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:00007ffd87885a40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411021
RDX: 0000000000000000 RSI: 0000000000730870 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffd87885960 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000146 R15: 0000000000000002
Modules linked in:
overlayfs: filesystem on './file0' not supported as upperdir
print_req_error: 105 callbacks suppressed
print_req_error: I/O error, dev loop4, sector 512
UDF-fs: error (device loop4): udf_read_tagged: read failed, block=512, location=512
print_req_error: I/O error, dev loop5, sector 2048
UDF-fs: error (device loop5): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop4): udf_load_vrs: No anchor found
UDF-fs: warning (device loop5): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: Scanning with blocksize 2048 failed
kobject: 'loop1' (00000000c6f4c673): kobject_uevent_env
kobject: 'loop1' (00000000c6f4c673): fill_kobj_path: path = '/devices/virtual/block/loop1'
print_req_error: I/O error, dev loop4, sector 64
print_req_error: I/O error, dev loop4, sector 512
UDF-fs: error (device loop4): udf_read_tagged: read failed, block=256, location=256
print_req_error: I/O error, dev loop5, sector 64
print_req_error: I/O error, dev loop5, sector 2048
UDF-fs: error (device loop5): udf_read_tagged: read failed, block=256, location=256
print_req_error: I/O error, dev loop5, sector 4096
UDF-fs: error (device loop5): udf_read_tagged: read failed, block=512, location=512
print_req_error: I/O error, dev loop4, sector 1024
UDF-fs: error (device loop4): udf_read_tagged: read failed, block=512, location=512
overlayfs: filesystem on './file0' not supported as upperdir
UDF-fs: warning (device loop5): udf_load_vrs: No anchor found
UDF-fs: warning (device loop4): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop5): udf_fill_super: No partition found (1)
---[ end trace 4d724d8ab203b0ac ]---
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
RSP: 0018:ffff880182b8f880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d
kobject: 'loop0' (000000005d2078f6): kobject_uevent_env
RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb
print_req_error: I/O error, dev loop4, sector 64
RBP: ffff880182b8fa60 R08: ffff88015845e440 R09: ffffed003b5c5b67
print_req_error: I/O error, dev loop4, sector 1024
R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801bdfd4500
R13: ffff880182b8f8f8 R14: 1ffff10030571f13 R15: dffffc0000000000
FS:  0000000000ca0940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
UDF-fs: error (device loop4): udf_read_tagged: read failed, block=256, location=256
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bd20000 CR3: 00000001d306a000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
UDF-fs: error (device loop5): udf_read_tagged: read failed, block=256, location=256
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop0' (000000005d2078f6): fill_kobj_path: path = '/devices/virtual/block/loop0'