From: Joe Perches <joe@perches.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org, Jiri Slaby <jslaby@suse.cz>,
Christian Lamparter <chunkeey@googlemail.com>,
Kalle Valo <kvalo@codeaurora.org>
Subject: Re: [PATCH 4.9 01/12] p54: memset(0) whole array
Date: Thu, 31 Aug 2017 09:40:50 -0700 [thread overview]
Message-ID: <1504197650.2786.38.camel@perches.com> (raw)
In-Reply-To: <20170831154238.982008528@linuxfoundation.org>
On Thu, 2017-08-31 at 17:44 +0200, Greg Kroah-Hartman wrote:
> 4.9-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: Jiri Slaby <jslaby@suse.cz>
>
> commit 6f17581788206444cbbcdbc107498f85e9765e3d upstream.
>
> gcc 7 complains:
> drivers/net/wireless/intersil/p54/fwio.c: In function 'p54_scan':
> drivers/net/wireless/intersil/p54/fwio.c:491:4: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
>
> Fix that by passing the correct size to memset.
>
> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> Cc: Christian Lamparter <chunkeey@googlemail.com>
> Cc: Kalle Valo <kvalo@codeaurora.org>
> Acked-by: Christian Lamparter <chunkeey@googlemail.com>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
> ---
> drivers/net/wireless/intersil/p54/fwio.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/drivers/net/wireless/intersil/p54/fwio.c
> +++ b/drivers/net/wireless/intersil/p54/fwio.c
> @@ -488,7 +488,7 @@ int p54_scan(struct p54_common *priv, u1
>
> entry += sizeof(__le16);
> chan->pa_points_per_curve = 8;
> - memset(chan->curve_data, 0, sizeof(*chan->curve_data));
> + memset(chan->curve_data, 0, sizeof(chan->curve_data));
> memcpy(chan->curve_data, entry,
> sizeof(struct p54_pa_curve_data_sample) *
> min((u8)8, curve_data->points_per_channel));
>
Why is this change correct?
curve_data is a pointer.
This now clears the sizeof a pointer and not
the sizeof struct p54_cal_database
next prev parent reply other threads:[~2017-08-31 16:40 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-31 15:44 [PATCH 4.9 00/12] 4.9.47-stable review Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 01/12] p54: memset(0) whole array Greg Kroah-Hartman
2017-08-31 16:40 ` Joe Perches [this message]
2017-09-02 15:51 ` Joe Perches
2017-09-03 12:32 ` Christian Lamparter
2017-09-03 15:07 ` Joe Perches
2017-08-31 15:44 ` [PATCH 4.9 02/12] scsi: isci: avoid array subscript warning Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 03/12] staging: wilc1000: simplify vif[i]->ndev accesses Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 04/12] gcov: support GCC 7.1 Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 06/12] arm64: mm: abort uaccess retries upon fatal signal Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 08/12] arm64: fpsimd: Prevent registers leaking across exec Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 09/12] locking/spinlock/debug: Remove spinlock lockup detection code Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 10/12] scsi: sg: protect accesses to reserved page array Greg Kroah-Hartman
2017-08-31 15:44 ` [PATCH 4.9 11/12] scsi: sg: reset res_in_use after unlinking reserved array Greg Kroah-Hartman
2017-08-31 16:45 ` [PATCH 4.9 00/12] 4.9.47-stable review Sumit Semwal
2017-08-31 16:59 ` Greg Kroah-Hartman
2017-08-31 19:08 ` Shuah Khan
2017-09-01 5:02 ` Greg Kroah-Hartman
2017-09-01 2:32 ` Guenter Roeck
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