------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 5028 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 1 PID: 5028 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 1 PID: 5028 at fs/buffer.c:1148 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
WARNING: CPU: 1 PID: 5028 at fs/buffer.c:1148 invalidate_bh_lru+0xf8/0x1a0 fs/buffer.c:1407
Modules linked in:
CPU: 1 PID: 5028 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__brelse fs/buffer.c:1148 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:325 [inline]
RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1394 [inline]
RIP: 0010:invalidate_bh_lru+0xf8/0x1a0 fs/buffer.c:1407
Code: 00 e8 bc 04 e6 ff f0 41 ff 0e eb 20 e8 31 f7 a0 ff 80 3c 2b 00 75 25 eb 2b e8 24 f7 a0 ff 48 c7 c7 60 5a 37 8a e8 38 0e d9 07 <0f> 0b 48 bd 00 00 00 00 00 fc ff df 80 3c 2b 00 74 08 4c 89 ff e8
RSP: 0018:ffffc90002d0fac8 EFLAGS: 00010046
RAX: d1bdf2b99501ba00 RBX: 1ffff11017226cb0 RCX: ffff888075483b80
RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8880b912795b R09: 1ffff11017224f2b
R10: dffffc0000000000 R11: ffffed1017224f2c R12: ffff8880b9136578
R13: 0000000000000008 R14: ffff88805bc1d060 R15: ffff8880b9136580
FS:  00007f66723536c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6673139b00 CR3: 0000000074d40000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 smp_call_function_many_cond+0x8d7/0xd90 kernel/smp.c:960
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1134
 kill_bdev block/bdev.c:76 [inline]
 blkdev_flush_mapping+0x17e/0x360 block/bdev.c:659
 blkdev_put_whole block/bdev.c:690 [inline]
 blkdev_put+0x4d1/0x7d0 block/bdev.c:957
 blkdev_close+0x76/0xa0 block/fops.c:478
 __fput+0x234/0x930 fs/file_table.c:311
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f66730acc8e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f6672352da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f66723536c0 RCX: 00007f66730acc8e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f6672352ee0 R14: 00007f66723536a8 R15: 00007f6669f33000
 </TASK>