------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 1381 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 0 PID: 1381 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 0 PID: 1381 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 0 PID: 1381 at fs/buffer.c:1229 invalidate_bh_lrus_cpu+0x1ba/0x280 fs/buffer.c:1544 Modules linked in: CPU: 0 UID: 0 PID: 1381 Comm: kworker/0:3 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: mm_percpu_wq lru_add_drain_per_cpu RIP: 0010:__brelse fs/buffer.c:1229 [inline] RIP: 0010:brelse include/linux/buffer_head.h:324 [inline] RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1498 [inline] RIP: 0010:invalidate_bh_lrus_cpu+0x1ba/0x280 fs/buffer.c:1544 Code: df be 04 00 00 00 e8 e5 29 dc ff 3e ff 0b eb 1e e8 8b be 75 ff eb 21 e8 84 be 75 ff 90 48 c7 c7 20 01 19 8c e8 37 62 36 ff 90 <0f> 0b 90 90 49 bf 00 00 00 00 00 fc ff df 48 8b 5c 24 10 43 80 3c RSP: 0018:ffffc90002bffac0 EFLAGS: 00010046 RAX: 0b7e4d9ed4219b00 RBX: ffff8880322947a0 RCX: ffff8880001b8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002bffb78 R08: ffffffff81601a42 R09: 1ffff11003f8519a R10: dffffc0000000000 R11: ffffed1003f8519b R12: 0000000000000010 R13: ffff88801fc39848 R14: 1ffff11003f87309 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000040a0e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lru_add_and_bh_lrus_drain mm/swap.c:714 [inline] lru_add_drain_per_cpu+0x21a/0x3f0 mm/swap.c:733 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244