------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 3626 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline] WARNING: CPU: 0 PID: 3626 at fs/buffer.c:1145 brelse+0x78/0xa0 include/linux/buffer_head.h:327 Modules linked in: CPU: 0 PID: 3626 Comm: syz-executor.1 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:__brelse fs/buffer.c:1145 [inline] RIP: 0010:brelse+0x78/0xa0 include/linux/buffer_head.h:327 Code: df be 04 00 00 00 e8 47 17 e1 ff f0 ff 0b eb 1c e8 dd aa 8d ff eb 15 e8 d6 aa 8d ff 48 c7 c7 60 b7 9d 8a 31 c0 e8 38 0f 56 ff <0f> 0b 5b 5d c3 89 d9 80 e1 07 80 c1 03 38 c1 7c af 48 89 df e8 4f RSP: 0018:ffffc90003e0fae8 EFLAGS: 00010046 RAX: b890af34cf302400 RBX: ffff88802f605400 RCX: ffff88807dad0000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff816aa79d R09: fffff520007c1ed9 R10: fffff520007c1ed9 R11: 1ffff920007c1ed8 R12: ffff8880b9a35d48 R13: 0000000000000002 R14: ffff8880b9a35cf8 R15: dffffc0000000000 FS: 0000555557119400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200a0000 CR3: 0000000029025000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __invalidate_bh_lrus+0x27a/0x3c0 fs/buffer.c:1391 invalidate_bh_lru+0x66/0xb0 fs/buffer.c:1404 smp_call_function_many_cond+0xe68/0x1670 kernel/smp.c:978 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1153 kill_bdev block/bdev.c:75 [inline] blkdev_flush_mapping+0x149/0x2c0 block/bdev.c:662 blkdev_put_whole block/bdev.c:693 [inline] blkdev_put+0x4a5/0x730 block/bdev.c:953 deactivate_locked_super+0xa7/0xf0 fs/super.c:331 cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:294 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb40c48ca17 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffecef57d78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fb40c48ca17 RDX: 00007ffecef57e4b RSI: 000000000000000a RDI: 00007ffecef57e40 RBP: 00007ffecef57e40 R08: 00000000ffffffff R09: 00007ffecef57c10 R10: 000055555711a8b3 R11: 0000000000000246 R12: 00007fb40c4e55f6 R13: 00007ffecef58f00 R14: 000055555711a810 R15: 00007ffecef58f40