VFS: brelse: Trying to free free buffer ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8001 at fs/buffer.c:1206 __brelse.part.0+0x11/0x14 fs/buffer.c:1206 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8001 Comm: syz-executor.0 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967 RIP: 0010:__brelse.part.0+0x11/0x14 fs/buffer.c:1206 RSP: 0000:ffff8880b56dfc30 EFLAGS: 00010082 RAX: 0000000000000027 RBX: ffff8880ba531ce0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016adbf7c RBP: ffff888037559e70 R08: 0000000000000027 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8880ac20c6c0 R12: dffffc0000000000 R13: ffff8880ba531d20 R14: 0000000000000001 R15: ffffffff81930ba0 __brelse fs/buffer.c:1207 [inline] brelse include/linux/buffer_head.h:331 [inline] invalidate_bh_lru.cold+0xa/0xf fs/buffer.c:1447 on_each_cpu_mask+0xda/0x210 kernel/smp.c:636 on_each_cpu_cond+0xe6/0x160 kernel/smp.c:684 kill_bdev fs/block_dev.c:97 [inline] __blkdev_put+0x242/0x800 fs/block_dev.c:1797 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f87884a4517 RSP: 002b:00007ffed5c1c8d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f87884a4517 RDX: 00007ffed5c1c9aa RSI: 000000000000000a RDI: 00007ffed5c1c9a0 RBP: 00007ffed5c1c9a0 R08: 00000000ffffffff R09: 00007ffed5c1c770 R10: 000055555568e903 R11: 0000000000000246 R12: 00007f87884fdb24 R13: 00007ffed5c1da60 R14: 000055555568e810 R15: 00007ffed5c1daa0 Kernel Offset: disabled Rebooting in 86400 seconds..