syzbot

VFS: Found a Xenix FS (block size = 1024) on device loop0
Bad inode number on dev loop0: 2 is out of range
SysV FS: get root inode failed
oldfs: cannot read superblock
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 4246 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline]
WARNING: CPU: 0 PID: 4246 at fs/buffer.c:1145 brelse include/linux/buffer_head.h:326 [inline]
WARNING: CPU: 0 PID: 4246 at fs/buffer.c:1145 __invalidate_bh_lrus fs/buffer.c:1380 [inline]
WARNING: CPU: 0 PID: 4246 at fs/buffer.c:1145 invalidate_bh_lru+0xf8/0x1a0 fs/buffer.c:1393
Modules linked in:
CPU: 0 PID: 4246 Comm: syz-executor137 Not tainted 6.1.124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__brelse fs/buffer.c:1145 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:326 [inline]
RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1380 [inline]
RIP: 0010:invalidate_bh_lru+0xf8/0x1a0 fs/buffer.c:1393
Code: 00 e8 ec 8d e0 ff f0 ff 0b eb 21 e8 22 f6 88 ff 41 80 3c 2e 00 75 26 eb 2c e8 14 f6 88 ff 48 c7 c7 e0 11 1a 8b e8 c8 0f 51 ff <0f> 0b 48 bd 00 00 00 00 00 fc ff df 41 80 3c 2e 00 74 08 4c 89 ff
RSP: 0018:ffffc90003ba7768 EFLAGS: 00010046
RAX: 682b8afc138b3d00 RBX: ffff88806d8c6060 RCX: ffff88801fe50000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8152b84e R09: ffffed10171c4f1c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b8e368f8
R13: 0000000000000000 R14: 1ffff110171c6d1f R15: ffff8880b8e368f8
FS:  0000555560c9c380(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562f9d0e3758 CR3: 0000000029186000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 smp_call_function_many_cond+0x1d26/0x3460 kernel/smp.c:989
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
 kill_bdev block/bdev.c:75 [inline]
 blkdev_flush_mapping+0x14a/0x2b0 block/bdev.c:664
 blkdev_put_whole block/bdev.c:695 [inline]
 blkdev_put+0x4c0/0x750 block/bdev.c:955
 deactivate_locked_super+0xa0/0x110 fs/super.c:332
 mount_bdev+0x2e5/0x3f0 fs/super.c:1445
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x2ba/0xb40 fs/namespace.c:3056
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3584
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f713d70e8ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 ee 08 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd4c1708e8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd4c170900 RCX: 00007f713d70e8ca
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd4c170900
RBP: 0000000000000004 R08: 00007ffd4c170940 R09: 0000000000009eaf
R10: 0000000002000412 R11: 0000000000000282 R12: 0000000002000412
R13: 00007ffd4c170940 R14: 0000000000000003 R15: 0000000000010000
 </TASK>