------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 4402 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline] WARNING: CPU: 0 PID: 4402 at fs/buffer.c:1145 brelse+0x78/0xa0 include/linux/buffer_head.h:326 Modules linked in: CPU: 0 PID: 4402 Comm: udevd Not tainted 6.1.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__brelse fs/buffer.c:1145 [inline] RIP: 0010:brelse+0x78/0xa0 include/linux/buffer_head.h:326 Code: df be 04 00 00 00 e8 17 89 e0 ff f0 ff 0b eb 1c e8 6d 6f 8c ff eb 15 e8 66 6f 8c ff 48 c7 c7 40 ff fd 8a 31 c0 e8 58 0d 54 ff <0f> 0b 5b 5d c3 89 d9 80 e1 07 80 c1 03 38 c1 7c af 48 89 df e8 1f RSP: 0018:ffffc9000c0cfa48 EFLAGS: 00010046 RAX: 84d69860a0cb8b00 RBX: ffff88802cd57d10 RCX: ffff8880302b9d40 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff816e568d R09: ffffed1017304f1b R10: ffffed1017304f1b R11: 1ffff11017304f1a R12: ffff8880b983ae80 R13: 0000000000000000 R14: ffff8880b9835d38 R15: dffffc0000000000 FS: 00007fefffc1b840(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2c4e2f2000 CR3: 00000000265ee000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __invalidate_bh_lrus+0x37/0x3c0 fs/buffer.c:1380 invalidate_bh_lru+0x66/0xb0 fs/buffer.c:1393 smp_call_function_many_cond+0xcb2/0x13d0 kernel/smp.c:978 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155 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 blkdev_close+0x55/0x80 block/fops.c:499 __fput+0x3ba/0x880 fs/file_table.c:320 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fefffd25fc3 Code: 48 ff ff ff b8 ff ff ff ff e9 3e ff ff ff 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 RSP: 002b:00007ffd2cc2b5b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007fefffc1b6a8 RCX: 00007fefffd25fc3 RDX: 000000000000001c RSI: 00007ffd2cc2adb8 RDI: 0000000000000008 RBP: 000055c62496d0c0 R08: 0000000000000007 R09: 000055c62496b370 R10: 000000000183322f R11: 0000000000000246 R12: 0000000000000002 R13: 000055c62495e790 R14: 0000000000000008 R15: 000055c624944910