loop4: detected capacity change from 0 to 128
VFS: Found a Xenix FS (block size = 1024) on device loop4
Bad inode number on dev loop4: 2 is out of range
SysV FS: get root inode failed
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 8948 at fs/buffer.c:1235 __brelse+0x71/0xa0 fs/buffer.c:1235
Modules linked in:
CPU: 1 UID: 0 PID: 8948 Comm: syz.4.883 Not tainted 6.12.0-rc3-next-20241016-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__brelse+0x71/0xa0 fs/buffer.c:1235
Code: e8 64 35 71 ff 48 89 df be 04 00 00 00 e8 97 16 db ff f0 ff 0b eb 17 e8 4d 35 71 ff 90 48 c7 c7 a0 9e 19 8c e8 10 28 32 ff 90 <0f> 0b 90 90 5b 5d c3 cc cc cc cc 89 d9 80 e1 07 80 c1 03 38 c1 7c
RSP: 0018:ffffc900092bfb60 EFLAGS: 00010246
RAX: 845b7460d3458b00 RBX: ffff88805c04d148 RCX: 0000000000040000
RDX: ffffc9001f02f000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000000 R08: ffffffff8155d7b2 R09: fffffbfff1cfa3e0
R10: dffffc0000000000 R11: fffffbfff1cfa3e0 R12: ffff88805c04d0e8
R13: ffff88807bf54000 R14: 0000000000000000 R15: ffff888073727800
FS:  00007faae59ff6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c25941d CR3: 0000000065292000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 brelse include/linux/buffer_head.h:324 [inline]
 sysv_fill_super+0x622/0x710 fs/sysv/super.c:417
 mount_bdev+0x20a/0x2d0 fs/super.c:1693
 legacy_get_tree+0xee/0x190 fs/fs_context.c:662
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faae5f7f79a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faae59fee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faae59feef0 RCX: 00007faae5f7f79a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007faae59feeb0
RBP: 0000000020000000 R08: 00007faae59feef0 R09: 0000000002000412
R10: 0000000002000412 R11: 0000000000000246 R12: 0000000020000100
R13: 00007faae59feeb0 R14: 0000000000009eb9 R15: 0000000020000140
 </TASK>