Re: WARNING in kmem_cache_free

Stephan Müller
2018-04-08T15:32:36Z

Am Sonntag, 8. April 2018, 13:18:06 CEST schrieb Dmitry Vyukov:

Hi Dmitry,

>
> Running syz-repro utility on this log, I think I've found the guilty guy:
> https://gist.githubusercontent.com/dvyukov/1dd75d55efd238e7207af1cc38478b3a/
> raw/403859b56b161a6fbb158e8953fac5bb6e73b1a1/gistfile1.txt
>

I am unable to reproduce it with the code. I am using the current
cryptodev-2.6 tree with kazan enabled. Could you please give me your kernel
config or a pointer of the used tree?

> It crashes as:
> BUG: KASAN: use-after-free in drbg_kcapi_seed+0x1178/0x12e0
> and:
> BUG: unable to handle kernel paging request at ffffebe000000020
> and with other indications of badly corrupted heap.
>
> This points to crypto/drbg.c, so +crypto maintainers.

Ciao
Stephan