From: sashiko-bot@kernel.org
To: "Mikhail Zaslonko" <zaslonko@linux.ibm.com>
Cc: "Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
linux-s390@vger.kernel.org, "Vasily Gorbik" <gor@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>
Subject: Re: [PATCH v2] s390/debug: Fix NULL pointer dereference in debug_info_copy()
Date: Wed, 16 Sep 2026 16:16:42 +0000 [thread overview]
Message-ID: <20260916161642.905971F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260916160626.1988684-1-zaslonko@linux.ibm.com>
> When debug_register_static() fails, it clears areas, active_pages and
> active_entries but leaves the area bounds unchanged. Copying such an
> area, either by opening its view file or via debug_dump(), makes
> debug_info_copy() dereference the NULL pointers.
>
> Skip the copy loop when the source has no areas.
>
> Closes: https://lore.kernel.org/r/20260903132123.12F271F00A3F@smtp.kernel.org
> Fixes: d72541f94512 ("s390/debug: add early tracing support")
> Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260916160626.1988684-1-zaslonko@linux.ibm.com?part=1
next prev parent reply other threads:[~2026-09-16 16:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 16:06 [PATCH v2] s390/debug: Fix NULL pointer dereference in debug_info_copy() Mikhail Zaslonko
2026-09-16 16:16 ` sashiko-bot [this message]
2026-09-18 10:44 ` Heiko Carstens
2026-09-22 10:30 ` Peter Oberparleiter
2026-09-22 10:35 ` Heiko Carstens
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