------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 4589 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 1 PID: 4589 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 1 PID: 4589 at fs/buffer.c:1148 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
WARNING: CPU: 1 PID: 4589 at fs/buffer.c:1148 invalidate_bh_lru+0xfb/0x1a0 fs/buffer.c:1407
Modules linked in:
CPU: 1 PID: 4589 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+0xfb/0x1a0 fs/buffer.c:1407
Code: 00 e8 89 03 e6 ff f0 41 ff 0e eb 20 e8 0e d4 a0 ff 80 3c 2b 00 75 22 eb 28 e8 01 d4 a0 ff 48 c7 c7 20 5d 37 8a e8 25 4e dd 07 <0f> 0b 4c 89 fd 4f 8d 3c 2c 80 3c 2b 00 74 08 4c 89 ff e8 2e 02 e6
RSP: 0018:ffffc9000317fae8 EFLAGS: 00010046
RAX: 63027536ae2c7f00 RBX: 1ffff11017226cb0 RCX: ffff88802af05940
RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8880b912795b R09: 1ffff11017224f2b
R10: dffffc0000000000 R11: ffffed1017224f2c R12: ffff8880b9136578
R13: 0000000000000008 R14: ffff888071ba9230 R15: dffffc0000000000
FS:  00007fc62631e880(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4eb3170e20 CR3: 0000000075f00000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 smp_call_function_many_cond+0x8f0/0xd80 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:655
 blkdev_put_whole block/bdev.c:686 [inline]
 blkdev_put+0x4c3/0x780 block/bdev.c:953
 blkdev_close+0x76/0xa0 block/fops.c:478
 __fput+0x212/0x8c0 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: 0033:0x7fc62640c407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffebdd58290 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007fc62631e880 RCX: 00007fc62640c407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007fc62631e6e8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000002
R13: 0000562ba9e6b410 R14: 0000000000000008 R15: 0000562ba9e75040
 </TASK>