linux-kernel - [PATCH v9 0/1] kasan: Avoid sleepable page allocation from atomic context

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Message-ID: <cover.1747316918.git.agordeev@linux.ibm.com>
Date: Thu, 15 May 2025 15:55:37 +0200
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Daniel Axtens <dja@...ens.net>, Harry Yoo <harry.yoo@...cle.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        kasan-dev@...glegroups.com, linux-s390@...r.kernel.org,
        stable@...r.kernel.org
Subject: [PATCH v9 0/1] kasan: Avoid sleepable page allocation from atomic context

Hi All,

I dropped Harry Yoo's Reviewed-by from this version.

Chages since v8:
- fixed page_owner=on issue preventing bulk allocations on x86 

Chages since v7:
- drop "unnecessary free pages" optimization
- fix error path page leak

Chages since v6:
- do not unnecessary free pages across iterations

Chages since v5:
- full error message included into commit description

Chages since v4:
- unused pages leak is avoided

Chages since v3:
- pfn_to_virt() changed to page_to_virt() due to compile error

Chages since v2:
- page allocation moved out of the atomic context

Chages since v1:
- Fixes: and -stable tags added to the patch description

Thanks!

Alexander Gordeev (1):
  kasan: Avoid sleepable page allocation from atomic context

 mm/kasan/shadow.c | 92 +++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 78 insertions(+), 14 deletions(-)

-- 
2.45.2