Re: [PATCH mm v3 00/34] kasan: switch tag-based modes to stack ring from per-object metadata

[Andrey Konovalov]

On Mon, Sep 19, 2022 at 10:08 AM Yu Zhao <yuzhao@xxxxxxxxxx> wrote:
>
> Hit the following with the latest mm-unstable. Please take a look. Thanks.
>
> BUG: rwlock bad magic on CPU#0, swapper/0, ffffffdc589d8218
> CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc3-lockdep+ #36
> Call trace:
>  dump_backtrace+0xfc/0x14c
>  show_stack+0x24/0x58
>  dump_stack_lvl+0x7c/0xa0
>  dump_stack+0x18/0x44
>  rwlock_bug+0x88/0x8c
>  do_raw_read_unlock+0x7c/0x90
>  _raw_read_unlock_irqrestore+0x54/0xa0
>  save_stack_info+0x100/0x118
>  kasan_save_alloc_info+0x20/0x2c
>  __kasan_slab_alloc+0x90/0x94
>  early_kmem_cache_node_alloc+0x8c/0x1a8
>  __kmem_cache_create+0x1ac/0x338
>  create_boot_cache+0xac/0xec
>  kmem_cache_init+0x8c/0x174
>  mm_init+0x3c/0x78
>  start_kernel+0x188/0x49c

Hi Yu,

Just mailed a fix.

Thank you for the report!