------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 6163 at fs/buffer.c:1235 __brelse fs/buffer.c:1235 [inline]
WARNING: CPU: 0 PID: 6163 at fs/buffer.c:1235 __brelse+0x6d/0xb0 fs/buffer.c:1229
Modules linked in:
CPU: 0 PID: 6163 Comm: udevd Not tainted 6.9.0-rc3-syzkaller-00399-g72374d71c315 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__brelse fs/buffer.c:1235 [inline]
RIP: 0010:__brelse+0x6d/0xb0 fs/buffer.c:1229
Code: 84 d2 75 52 44 8b 63 60 31 ff 44 89 e6 e8 3b 95 81 ff 45 85 e4 75 20 e8 51 9a 81 ff 90 48 c7 c7 60 16 1e 8b e8 04 6f 44 ff 90 <0f> 0b 90 90 5b 5d 41 5c e9 36 9a 81 ff e8 31 9a 81 ff be 04 00 00
RSP: 0018:ffffc900039d7c00 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffff8880119999f8 RCX: ffffffff81512be9
RDX: ffff88801d528000 RSI: ffffffff81512bf6 RDI: 0000000000000001
RBP: ffff888011999a58 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff8880119999f8 R14: dffffc0000000000 R15: ffff88802c23fc40
FS:  00007f38f4f34280(0000) GS:ffff88802c200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000edcba000 CR3: 000000006529c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 brelse include/linux/buffer_head.h:309 [inline]
 __invalidate_bh_lrus fs/buffer.c:1487 [inline]
 invalidate_bh_lru+0xa2/0x190 fs/buffer.c:1500
 csd_do_func kernel/smp.c:133 [inline]
 smp_call_function_many_cond+0x10af/0x1420 kernel/smp.c:846
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 kill_bdev block/bdev.c:84 [inline]
 blkdev_flush_mapping+0x13a/0x310 block/bdev.c:644
 blkdev_put_whole+0xc4/0xf0 block/bdev.c:675
 bdev_release+0x487/0x710 block/bdev.c:1066
 blkdev_release+0x15/0x20 block/fops.c:628
 __fput+0x270/0xb80 fs/file_table.c:422
 __fput_sync+0x47/0x50 fs/file_table.c:507
 __do_sys_close fs/open.c:1556 [inline]
 __se_sys_close fs/open.c:1541 [inline]
 __x64_sys_close+0x86/0x100 fs/open.c:1541
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f38f4b170a8
Code: 48 8b 05 83 9d 0d 00 64 c7 00 16 00 00 00 83 c8 ff 48 83 c4 20 5b c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 5b 48 8b 15 51 9d 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc22c37298 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f38f4f340e0 RCX: 00007f38f4b170a8
RDX: 000055a781da5be4 RSI: 00007ffc22c36a98 RDI: 0000000000000008
RBP: 000055a2dbf740e0 R08: 0000000000000006 R09: 2c97f5c633ad014b
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000002
R13: 000055a2dbf655f0 R14: 0000000000000008 R15: 000055a2dbf51910
 </TASK>