linux-kernel - Re: [PATCH v2] mpt3sas: Avoid test/set_bit() operating in non-allocated memory

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Message-ID: <171763343411.4164272.12258794227278624618.b4-ty@oracle.com>
Date: Wed,  5 Jun 2024 20:24:19 -0400
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: Sathya Prakash <sathya.prakash@...adcom.com>,
        Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        Suganath Prabu Subramani <suganath-prabu.subramani@...adcom.com>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Chaitra P B <chaitra.basappa@...adcom.com>,
        Breno Leitao <leitao@...ian.org>
Cc: "Martin K . Petersen" <martin.petersen@...cle.com>, leit@...a.com,
        stable@...r.kernel.org, Keith Busch <kbusch@...nel.org>,
        MPT-FusionLinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mpt3sas: Avoid test/set_bit() operating in non-allocated memory

On Wed, 05 Jun 2024 01:55:29 -0700, Breno Leitao wrote:

> There is a potential out-of-bounds access when using test_bit() on a
> single word. The test_bit() and set_bit() functions operate on long
> values, and when testing or setting a single word, they can exceed the
> word boundary. KASAN detects this issue and produces a dump:
> 
> 	 BUG: KASAN: slab-out-of-bounds in _scsih_add_device.constprop.0 (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 drivers/scsi/mpt3sas/mpt3sas_scsih.c:7331) mpt3sas
> 
> [...]

Applied to 6.10/scsi-fixes, thanks!

[1/1] mpt3sas: Avoid test/set_bit() operating in non-allocated memory
      https://git.kernel.org/mkp/scsi/c/4254dfeda82f

-- 
Martin K. Petersen	Oracle Linux Engineering