erofs: cannot find valid erofs superblock
erofs: options -> nouser_xattr,user_xattr,noacl,subj_user=trusted,vboxnet0$,
erofs: cannot find valid erofs superblock
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
CPU: 0 PID: 30010 Comm: syz-executor0 Not tainted 4.20.0 #166
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fuse_retrieve fs/fuse/dev.c:1745 [inline]
RIP: 0010:fuse_notify_retrieve fs/fuse/dev.c:1807 [inline]
RIP: 0010:fuse_notify fs/fuse/dev.c:1840 [inline]
RIP: 0010:fuse_dev_do_write+0x1dc2/0x3820 fs/fuse/dev.c:1919
Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 e9 17 00 00 49 8b 9d 58 01 00 00 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 8f
kobject: 'loop2' (0000000002f5e05d): kobject_uevent_env
RSP: 0018:ffff8881b55a74b8 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005de9000
RDX: 0000000000000000 RSI: ffffffff8286bac3 RDI: 0000000000000004
RBP: ffff8881b55a7a50 R08: ffff8881c89705c0 R09: ffffed103632f882
R10: ffffed103632f882 R11: ffff8881b197c413 R12: 0000000000000000
R13: ffff8881b197c3f0 R14: 0000000000000000 R15: 0000000000000030
FS:  00007fd32b5f4700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop2' (0000000002f5e05d): fill_kobj_path: path = '/devices/virtual/block/loop2'
CR2: 000000000073c000 CR3: 000000016fa20000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
kobject: 'loop4' (00000000068b778d): kobject_uevent_env
kobject: 'loop4' (00000000068b778d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000fd192095): kobject_uevent_env
kobject: 'loop3' (00000000fd192095): fill_kobj_path: path = '/devices/virtual/block/loop3'
 fuse_dev_write+0x19a/0x240 fs/fuse/dev.c:2003
 call_write_iter include/linux/fs.h:1857 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6b8/0x9f0 fs/read_write.c:487
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457759
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd32b5f3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457759
RDX: 0000000000000030 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd32b5f46d4
R13: 00000000004c626d R14: 00000000004db280 R15: 00000000ffffffff
Modules linked in:
---[ end trace 344c35354d84e157 ]---
kobject: 'loop2' (0000000002f5e05d): kobject_uevent_env
kobject: 'loop5' (000000002f196880): kobject_uevent_env
kobject: 'loop2' (0000000002f5e05d): fill_kobj_path: path = '/devices/virtual/block/loop2'
RIP: 0010:fuse_retrieve fs/fuse/dev.c:1745 [inline]
RIP: 0010:fuse_notify_retrieve fs/fuse/dev.c:1807 [inline]
RIP: 0010:fuse_notify fs/fuse/dev.c:1840 [inline]
RIP: 0010:fuse_dev_do_write+0x1dc2/0x3820 fs/fuse/dev.c:1919
erofs: read_super, device -> /dev/loop2
erofs: options -> nouser_xattr,user_xattr,noacl,subj_user=trusted,vboxnet0$,
kobject: 'loop1' (00000000b92935eb): kobject_uevent_env
Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 e9 17 00 00 49 8b 9d 58 01 00 00 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 8f
erofs: cannot find valid erofs superblock
kobject: 'loop5' (000000002f196880): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000b92935eb): fill_kobj_path: path = '/devices/virtual/block/loop1'
RSP: 0018:ffff8881b55a74b8 EFLAGS: 00010247
kobject: 'loop4' (00000000068b778d): kobject_uevent_env
kobject: 'loop4' (00000000068b778d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (0000000002f5e05d): kobject_uevent_env
kobject: 'loop2' (0000000002f5e05d): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000068b778d): kobject_uevent_env
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90005de9000
kobject: 'loop4' (00000000068b778d): fill_kobj_path: path = '/devices/virtual/block/loop4'
RDX: 0000000000000000 RSI: ffffffff8286bac3 RDI: 0000000000000004
RBP: ffff8881b55a7a50 R08: ffff8881c89705c0 R09: ffffed103632f882
R10: ffffed103632f882 R11: ffff8881b197c413 R12: 0000000000000000
R13: ffff8881b197c3f0 R14: 0000000000000000 R15: 0000000000000030
kobject: 'loop2' (0000000002f5e05d): kobject_uevent_env
FS:  00007fd32b5f4700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop2' (0000000002f5e05d): fill_kobj_path: path = '/devices/virtual/block/loop2'
CR2: 0000000000625208 CR3: 000000016fa20000 CR4: 00000000001406f0
kobject: 'loop5' (000000002f196880): kobject_uevent_env
kobject: 'loop2' (0000000002f5e05d): kobject_uevent_env
kobject: 'loop5' (000000002f196880): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (0000000002f5e05d): fill_kobj_path: path = '/devices/virtual/block/loop2'
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600