syzbot

RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdc9f8bf90
RBP: 00007ffdc9f8bf90 R08: 00007ffdc9f8bfd0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000188
R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000003
------------[ cut here ]------------
kernel BUG at fs/inode.c:1571!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8117 Comm: syz-executor362 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:iput+0x727/0x860 fs/inode.c:1571
Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 18 fd ff ff 48 8b 3c 24 e8 33 d9 ee ff e9 0a fd ff ff e8 39 fc b8 ff <0f> 0b e8 32 fc b8 ff 48 89 ef e8 1a f7 ff ff 4c 89 f7 e8 b2 c6 6f
RSP: 0018:ffff88808d2a7a80 EFLAGS: 00010293
RAX: ffff888094b02380 RBX: 0000000000000040 RCX: ffffffff81a9826e
RDX: 0000000000000000 RSI: ffffffff81a98937 RDI: 0000000000000007
RBP: ffff88808ac0a998 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880a922ec80
R13: ffff88808ac0a998 R14: 0000000000000000 R15: 00000000fffffff4
FS:  00005555570e7300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f338a04f740 CR3: 0000000099b85000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 erofs_read_super drivers/staging/erofs/super.c:439 [inline]
 erofs_fill_super+0x1205/0x12cc drivers/staging/erofs/super.c:499
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 erofs_mount+0x8c/0xc0 drivers/staging/erofs/super.c:512
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f6d2daa44da
Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdc9f8bf78 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffdc9f8bfd0 RCX: 00007f6d2daa44da
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdc9f8bf90
RBP: 00007ffdc9f8bf90 R08: 00007ffdc9f8bfd0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000020000188
R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000003
Modules linked in:
---[ end trace a891b74d60c7b12c ]---
RIP: 0010:iput+0x727/0x860 fs/inode.c:1571
Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 18 fd ff ff 48 8b 3c 24 e8 33 d9 ee ff e9 0a fd ff ff e8 39 fc b8 ff <0f> 0b e8 32 fc b8 ff 48 89 ef e8 1a f7 ff ff 4c 89 f7 e8 b2 c6 6f
RSP: 0018:ffff88808d2a7a80 EFLAGS: 00010293
RAX: ffff888094b02380 RBX: 0000000000000040 RCX: ffffffff81a9826e
RDX: 0000000000000000 RSI: ffffffff81a98937 RDI: 0000000000000007
RBP: ffff88808ac0a998 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880a922ec80
R13: ffff88808ac0a998 R14: 0000000000000000 R15: 00000000fffffff4
FS:  00005555570e7300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f338a04f740 CR3: 0000000099b85000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400