From: Bart Van Assche <bvanassche@acm.org>
To: Colin King <colin.king@canonical.com>,
"James E . J . Bottomley" <jejb@linux.ibm.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>,
Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com>,
Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>,
linux-scsi@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] scsi: fix unintended sign extension on left shifts
Date: Mon, 14 Oct 2019 08:58:03 -0700 [thread overview]
Message-ID: <0e2a6d4c-b346-cb1b-7941-e247a0d0f8b2@acm.org> (raw)
In-Reply-To: <20191014121613.21999-1-colin.king@canonical.com>
On 10/14/19 5:16 AM, Colin King wrote:
> diff --git a/drivers/scsi/scsi_trace.c b/drivers/scsi/scsi_trace.c
> index 0f17e7dac1b0..1d3a5a2dc229 100644
> --- a/drivers/scsi/scsi_trace.c
> +++ b/drivers/scsi/scsi_trace.c
> @@ -38,7 +38,7 @@ scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
> const char *ret = trace_seq_buffer_ptr(p);
> sector_t lba = 0, txlen = 0;
>
> - lba |= (cdb[2] << 24);
> + lba |= ((u64)cdb[2] << 24);
> lba |= (cdb[3] << 16);
> lba |= (cdb[4] << 8);
> lba |= cdb[5];
Have you considered to use get/put_unaligned_be*() instead of making the
above change?
Thanks,
Bart.
next prev parent reply other threads:[~2019-10-14 15:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 12:16 [PATCH] scsi: fix unintended sign extension on left shifts Colin King
2019-10-14 15:58 ` Bart Van Assche [this message]
2019-10-15 7:44 ` Christoph Hellwig
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