From: Bean Huo <beanhuo@iokpp.de>
To: Stanley Jhu <stanleyjhu@google.com>,
"Martin K. Petersen" <mkp@kernel.org>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: powenkao@google.com, Alim Akhtar <alim.akhtar@samsung.com>,
Bart Van Assche <bvanassche@acm.org>,
Bean Huo <beanhuo@micron.com>,
Peter Wang <peter.wang@mediatek.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH 2/3] scsi: ufs: bsg: Clear the UIC result byte before sending UIC commands
Date: Wed, 14 Oct 2026 12:43:30 +0200 [thread overview]
Message-ID: <c39f4af2716cdc1c71170a9eabdbe29abb8c4bb2.camel@iokpp.de> (raw)
In-Reply-To: <20261013102913.948718-3-stanleyjhu@google.com>
On Tue, 2026-10-13 at 18:29 +0800, Stanley Jhu wrote:
> ufs_bsg_request() passes the user-supplied UIC argument2 unchanged,
> including the result byte (bits 7:0) that only the host controller
> writes. A non-zero value triggers the WARN_ON_ONCE() in
> ufshcd_dispatch_uic_cmd() and corrupts the reported result. Found by
> syzkaller.
>
> Clear the result byte before sending the command.
>
> Fixes: e77044c5a842 ("scsi: ufs-bsg: Add support for uic commands in
> ufs_bsg_request()")
> Fixes: 9fb4c793223b ("scsi: ufs: core: Complain if UIC argument 2 is invalid")
> Cc: stable@vger.kernel.org
> Signed-off-by: Stanley Jhu <stanleyjhu@google.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
next prev parent reply other threads:[~2026-10-14 10:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-13 10:29 [PATCH 0/3] scsi: ufs: Fix UIC result byte and BSG request length handling Stanley Jhu
2026-10-13 10:29 ` [PATCH 1/3] scsi: ufs: bsg: Validate request_len before accessing request Stanley Jhu
2026-10-14 10:02 ` Bean Huo
2026-10-13 10:29 ` [PATCH 2/3] scsi: ufs: bsg: Clear the UIC result byte before sending UIC commands Stanley Jhu
2026-10-14 7:28 ` Peter Wang
2026-10-14 10:43 ` Bean Huo [this message]
2026-10-14 13:30 ` Bart Van Assche
2026-10-15 0:22 ` Stanley Jhu
2026-10-13 10:29 ` [PATCH 3/3] scsi: ufs: core: Clear stale UIC result byte before peer DME retries Stanley Jhu
2026-10-14 10:58 ` Bean Huo
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