VFS: brelse: Trying to free free buffer ------------[ cut here ]------------ WARNING: CPU: 0 PID: 31909 at fs/buffer.c:1206 __brelse fs/buffer.c:1206 [inline] WARNING: CPU: 0 PID: 31909 at fs/buffer.c:1206 __brelse.cold+0x11/0x18 fs/buffer.c:1200 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 31909 Comm: syz-executor.4 Not tainted 4.14.109+ #45 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 panic+0x1d9/0x3c2 kernel/panic.c:182 __warn.cold+0x2f/0x3b kernel/panic.c:546 Kernel Offset: 0x1ee00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) Rebooting in 86400 seconds..