loop0: detected capacity change from 0 to 128
oldfs: cannot read superblock
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 5068 at fs/buffer.c:1235 __brelse fs/buffer.c:1235 [inline]
WARNING: CPU: 0 PID: 5068 at fs/buffer.c:1235 brelse include/linux/buffer_head.h:309 [inline]
WARNING: CPU: 0 PID: 5068 at fs/buffer.c:1235 __invalidate_bh_lrus fs/buffer.c:1487 [inline]
WARNING: CPU: 0 PID: 5068 at fs/buffer.c:1235 invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1500
Modules linked in:
CPU: 0 PID: 5068 Comm: syz-executor395 Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__brelse fs/buffer.c:1235 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:309 [inline]
RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1487 [inline]
RIP: 0010:invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1500
Code: 34 4f dd ff f0 ff 0b eb 25 e8 2a 3b 7c ff 41 80 3c 2e 00 75 2a eb 30 e8 1c 3b 7c ff 90 48 c7 c7 c0 dc d8 8b e8 9f b7 3e ff 90 <0f> 0b 90 90 48 bd 00 00 00 00 00 fc ff df 41 80 3c 2e 00 74 08 4c
RSP: 0018:ffffc90002e37908 EFLAGS: 00010046
RAX: 89dfff8bc85d2100 RBX: ffff88807b4ed888 RCX: ffff88802376da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81587f92 R09: 1ffff1101728519a
R10: dffffc0000000000 R11: ffffed101728519b R12: ffff8880b9439370
R13: 0000000000000000 R14: 1ffff1101728726e R15: ffff8880b9439370
FS:  000055558f91c380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c99a55ebc8 CR3: 000000007f38e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 csd_do_func kernel/smp.c:133 [inline]
 smp_call_function_many_cond+0x15fe/0x2a00 kernel/smp.c:846
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
 kill_bdev block/bdev.c:84 [inline]
 blkdev_flush_mapping+0x14c/0x2b0 block/bdev.c:644
 blkdev_put_whole block/bdev.c:675 [inline]
 bdev_release+0x489/0x720 block/bdev.c:1066
 blkdev_release+0x15/0x20 block/fops.c:628
 __fput+0x429/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 ptrace_notify+0x2d2/0x380 kernel/signal.c:2404
 ptrace_report_syscall include/linux/ptrace.h:415 [inline]
 ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline]
 syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
 syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218
 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e62a50bba
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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:00007ffde3a6b258 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffea RBX: 00007ffde3a6b270 RCX: 00007f6e62a50bba
RDX: 0000000020000080 RSI: 0000000020000000 RDI: 00007ffde3a6b270
RBP: 0000000000000004 R08: 00007ffde3a6b2b0 R09: 00ff373737373737
R10: 0000000000004000 R11: 0000000000000282 R12: 0000000000004000
R13: 00007ffde3a6b2b0 R14: 0000000000000003 R15: 0000000000010000
 </TASK>