linux-kernel - Re: [PATCH] uprobes: use vm_special

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Message-ID: <87v7zc5aw6.fsf@mail.lhotse>
Date: Wed, 04 Sep 2024 13:57:13 +1000
From: Michael Ellerman <mpe@...erman.id.au>
To: Sven Schnelle <svens@...ux.ibm.com>, Andrew Morton
 <akpm@...ux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung
 Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, Alexander
 Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa
 <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, Adrian Hunter
 <adrian.hunter@...el.com>, "Liang, Kan" <kan.liang@...ux.intel.com>, Linus
 Torvalds <torvalds@...ux-foundation.org>, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH] uprobes: use vm_special_mapping close() functionality

Sven Schnelle <svens@...ux.ibm.com> writes:
> Hi Michael,

Hi Sven,

> Sven Schnelle <svens@...ux.ibm.com> writes:
>
>> The following KASAN splat was shown:
>>
>> [   44.505448] ==================================================================                                                                      20:37:27 [3421/145075]
>> [   44.505455] BUG: KASAN: slab-use-after-free in special_mapping_close+0x9c/0xc8
>> [   44.505471] Read of size 8 at addr 00000000868dac48 by task sh/1384
...
>> [..]
>
> As this has a dependency on your special mapping close series, do you
> want to carry that with your patches?

Andrew has my series in mm-stable, so I think this should go into mm as
well. I assume he will pick it up.

cheers