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: 0 PID: 9486 at fs/buffer.c:1235 __brelse+0x84/0xd8 fs/buffer.c:1235
Modules linked in:
CPU: 0 UID: 0 PID: 9486 Comm: syz.4.1124 Not tainted 6.12.0-rc4-syzkaller-gce8e69898653 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __brelse+0x84/0xd8 fs/buffer.c:1235
lr : __brelse+0x84/0xd8 fs/buffer.c:1235
sp : ffff8000a37378d0
x29: ffff8000a37378d0 x28: ffff80008b8c1640 x27: 0000000000000000
x26: ffff0000f2366570 x25: ffff0000f2366570 x24: 0000000000000002
x23: ffff0000e2a62160 x22: ffff0000cb0b8440 x21: 0000000000000000
x20: 0000000000000000 x19: ffff0000f23665d0 x18: 0000000000000008
x17: 0000000000000000 x16: ffff80008b3d8b5c x15: ffff700011f0f678
x14: 1ffff00011f0f678 x13: 0000000000000004 x12: ffffffffffffffff
x11: 0000000000040000 x10: 000000000000566f x9 : 37d2a95125ce8c00
x8 : 37d2a95125ce8c00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000a3736ff8 x4 : ffff80008f8edac0 x3 : ffff800080397c88
x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
 __brelse+0x84/0xd8 fs/buffer.c:1235 (P)
 __brelse+0x84/0xd8 fs/buffer.c:1235 (L)
 brelse include/linux/buffer_head.h:324 [inline]
 sysv_fill_super+0x510/0x5f8 fs/sysv/super.c:417
 mount_bdev+0x1d4/0x2a0 fs/super.c:1679
 sysv_mount+0x44/0x58 fs/sysv/super.c:534
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3507
 path_mount+0x590/0xe04 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount fs/namespace.c:4032 [inline]
 __arm64_sys_mount+0x45c/0x5a8 fs/namespace.c:4032
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 1080
hardirqs last  enabled at (1079): [<ffff8000803a0498>] __up_console_sem kernel/printk/printk.c:344 [inline]
hardirqs last  enabled at (1079): [<ffff8000803a0498>] __console_unlock+0x70/0xc4 kernel/printk/printk.c:2844
hardirqs last disabled at (1080): [<ffff80008b49cd20>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488
softirqs last  enabled at (1040): [<ffff8000802099c4>] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last  enabled at (1040): [<ffff8000802099c4>] handle_softirqs+0xa38/0xbf8 kernel/softirq.c:582
softirqs last disabled at (1005): [<ffff800080020db4>] __do_softirq+0x14/0x20 kernel/softirq.c:588
---[ end trace 0000000000000000 ]---
oldfs: cannot read superblock