From: sashiko-bot@kernel.org
To: "Vineeth Vijayan" <vneethv@linux.ibm.com>
Cc: "Alexander Gordeev" <agordeev@linux.ibm.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
linux-s390@vger.kernel.org
Subject: Re: [PATCH] s390/cio: Fix NULL dereference in ccw_device_get_util_str()
Date: Tue, 22 Sep 2026 21:01:23 +0000 [thread overview]
Message-ID: <20260922210123.77D311F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260922204839.965043-1-vneethv@linux.ibm.com>
> The channel path registry entry associated with a CHPID may be removed
> while the subchannel's PMCW still references that CHPID. In this case,
> chpid_to_chp() can return NULL, leading to a NULL pointer dereference.
>
> Add the missing NULL check before dereferencing the returned pointer.
>
> Fixes: 199652309a4d ("s390/cio: add helper to query utility strings per given ccw device")
> Cc: stable@vger.kernel.org
> Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260922204839.965043-1-vneethv@linux.ibm.com?part=1
next prev parent reply other threads:[~2026-09-22 21:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-22 20:48 [PATCH] s390/cio: Fix NULL dereference in ccw_device_get_util_str() Vineeth Vijayan
2026-09-22 21:01 ` sashiko-bot [this message]
2026-09-23 8:57 ` Peter Oberparleiter
2026-09-23 9:22 ` Vineeth Vijayan
2026-09-23 14:38 ` Heiko Carstens
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