VFS: brelse: Trying to free free buffer
WARNING: CPU: 2 PID: 5312 at fs/buffer.c:1235 __brelse fs/buffer.c:1235 [inline]
WARNING: CPU: 2 PID: 5312 at fs/buffer.c:1235 __brelse+0x6d/0xb0 fs/buffer.c:1229
Modules linked in:
CPU: 2 PID: 5312 Comm: syz-executor.2 Not tainted 6.9.0-rc3-syzkaller-00208-g586b5dfb51b9 #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 1b ad 82 ff 45 85 e4 75 20 e8 31 b2 82 ff 90 48 c7 c7 e0 f4 1d 8b e8 44 20 45 ff 90 <0f> 0b 90 90 5b 5d 41 5c e9 16 b2 82 ff e8 11 b2 82 ff be 04 00 00
RSP: 0018:ffffc900036cfb68 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff88802fba9bc8 RCX: ffffc90003dec000
RDX: 0000000000040000 RSI: ffffffff81503356 RDI: 0000000000000001
RBP: ffff88802fba9c28 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88802fba9bc8 R14: dffffc0000000000 R15: ffff88806b43fc00
FS:  00007f7610bee6c0(0000) GS:ffff88806b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7605c0f000 CR3: 0000000025924000 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
 task_work_run+0x14e/0x250 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f760fe7f56a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7610bedef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffea RBX: 00007f7610bedf80 RCX: 00007f760fe7f56a
RDX: 0000000020000080 RSI: 0000000020000000 RDI: 00007f7610bedf40
RBP: 0000000020000080 R08: 00007f7610bedf80 R09: 0000000000004000
R10: 0000000000004000 R11: 0000000000000202 R12: 0000000020000000
R13: 00007f7610bedf40 R14: 0000000000009e81 R15: 0000000020000140
 </TASK>