From: Holger Dengler <dengler@linux.ibm.com>
To: Harald Freudenberger <freude@linux.ibm.com>
Cc: fcallies@linux.ibm.com, ifranzki@linux.ibm.com,
linux-s390@vger.kernel.org, Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
linux-crypto@vger.kernel.org
Subject: Re: [PATCH v4 3/3] s390/crypto: Fix use of mutex in atomic context
Date: Fri, 14 Aug 2026 15:21:43 +0200 [thread overview]
Message-ID: <3a21be7a-3377-4a45-b802-266fa8bd2a1b@linux.ibm.com> (raw)
In-Reply-To: <20260814123711.61145-4-freude@linux.ibm.com>
On 8/14/26 14:37, Harald Freudenberger wrote:
> The AES CTR implementation used a mutex to lock one page of exclusive
> memory for fast CTR processing. Unfortunately a mutex is not save to
> use in atomic or interrupt context. So use a binary semaphore instead
> which is save to use in such environments.
>
> Fixes: 7988fb2c03c8 ("crypto: s390/aes - convert to skcipher API")
> Suggested-by: Heiko Carstens <hca@linux.ibm.com>
> Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
> Cc: stable@vger.kernel.org # 5.5+
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
--
Mit freundlichen Grüßen / Kind regards
Holger Dengler
prev parent reply other threads:[~2026-08-14 13:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-14 12:37 [PATCH v4 0/3] Fixes and rework for aes_s390 Harald Freudenberger
2026-08-14 12:37 ` [PATCH v4 1/3] s390/crypto: Fix skcipher_walk return code handling in aes_s390 Harald Freudenberger
2026-08-14 13:30 ` Holger Dengler
2026-08-14 12:37 ` [PATCH v4 2/3] s390/crypto: Fix missing scrub of temp buffers with AES ctr and gcm algorithm Harald Freudenberger
2026-08-14 13:32 ` Holger Dengler
2026-08-14 12:37 ` [PATCH v4 3/3] s390/crypto: Fix use of mutex in atomic context Harald Freudenberger
2026-08-14 13:21 ` Holger Dengler [this message]
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