All of lore.kernel.org
 help / color / mirror / Atom feed
From: Xie XiuQi <xiexiuqi@huawei.com>
To: Dave Chinner <david@fromorbit.com>
Cc: Joe Perches <joe@perches.com>,
	linux-kernel@vger.kernel.org, xfs@oss.sgi.com
Subject: Re: [PATCH] xfs: fix signed integer overflow
Date: Tue, 13 Sep 2016 15:23:39 +0800	[thread overview]
Message-ID: <57D7A97B.4080901@huawei.com> (raw)
In-Reply-To: <20160913065738.GF30497@dastard>

On 2016/9/13 14:57, Dave Chinner wrote:
> On Fri, Sep 09, 2016 at 03:16:48PM +0800, Xie XiuQi wrote:
>> On 2016/9/9 14:42, Joe Perches wrote:
>>> On Fri, 2016-09-09 at 14:38 +0800, Xie XiuQi wrote:
>>>> Use 1U for unsigned long, or we'll meet a overflow issue with UBSAN.
>>> trivia: misleading commit message
>>>
>>> 1U is for unsigned int not unsigned long int
>>>
>> Sorry, my fault. Thank you for your comments.
>>
>> From 9cb8e36406a54ce0eaade31dd28f6068f03de1d2 Mon Sep 17 00:00:00 2001
>> From: Xie XiuQi <xiexiuqi@huawei.com>
>> Date: Tue, 6 Sep 2016 11:15:34 +0800
>> Subject: [PATCH v2] xfs: fix signed integer overflow
> ....
>> ---
>>  fs/xfs/xfs_buf_item.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
>> index e455f90..3a27997 100644
>> --- a/fs/xfs/xfs_buf_item.c
>> +++ b/fs/xfs/xfs_buf_item.c
>> @@ -865,7 +865,7 @@ xfs_buf_item_log_segment(
>>          */
>>         if (bit) {
>>                 end_bit = MIN(bit + bits_to_set, (uint)NBWORD);
>> -               mask = ((1 << (end_bit - bit)) - 1) << bit;
>> +               mask = ((1U << (end_bit - bit)) - 1) << bit;
>>                 *wordp |= mask;
>>                 wordp++;
>>                 bits_set = end_bit - bit;
> This patch is whitespace damaged and fails to apply. I've fixed it
> up as this is a trivial change. However, please fix the problem
> before you submit more patches.

I will, thank you very mush.

>
> Cheers,
>
> Dave.


_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs

WARNING: multiple messages have this Message-ID (diff)
From: Xie XiuQi <xiexiuqi@huawei.com>
To: Dave Chinner <david@fromorbit.com>
Cc: Joe Perches <joe@perches.com>, <xfs@oss.sgi.com>,
	<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] xfs: fix signed integer overflow
Date: Tue, 13 Sep 2016 15:23:39 +0800	[thread overview]
Message-ID: <57D7A97B.4080901@huawei.com> (raw)
In-Reply-To: <20160913065738.GF30497@dastard>

On 2016/9/13 14:57, Dave Chinner wrote:
> On Fri, Sep 09, 2016 at 03:16:48PM +0800, Xie XiuQi wrote:
>> On 2016/9/9 14:42, Joe Perches wrote:
>>> On Fri, 2016-09-09 at 14:38 +0800, Xie XiuQi wrote:
>>>> Use 1U for unsigned long, or we'll meet a overflow issue with UBSAN.
>>> trivia: misleading commit message
>>>
>>> 1U is for unsigned int not unsigned long int
>>>
>> Sorry, my fault. Thank you for your comments.
>>
>> From 9cb8e36406a54ce0eaade31dd28f6068f03de1d2 Mon Sep 17 00:00:00 2001
>> From: Xie XiuQi <xiexiuqi@huawei.com>
>> Date: Tue, 6 Sep 2016 11:15:34 +0800
>> Subject: [PATCH v2] xfs: fix signed integer overflow
> ....
>> ---
>>  fs/xfs/xfs_buf_item.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
>> index e455f90..3a27997 100644
>> --- a/fs/xfs/xfs_buf_item.c
>> +++ b/fs/xfs/xfs_buf_item.c
>> @@ -865,7 +865,7 @@ xfs_buf_item_log_segment(
>>          */
>>         if (bit) {
>>                 end_bit = MIN(bit + bits_to_set, (uint)NBWORD);
>> -               mask = ((1 << (end_bit - bit)) - 1) << bit;
>> +               mask = ((1U << (end_bit - bit)) - 1) << bit;
>>                 *wordp |= mask;
>>                 wordp++;
>>                 bits_set = end_bit - bit;
> This patch is whitespace damaged and fails to apply. I've fixed it
> up as this is a trivial change. However, please fix the problem
> before you submit more patches.

I will, thank you very mush.

>
> Cheers,
>
> Dave.

  reply	other threads:[~2016-09-13  7:24 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-09  6:38 [PATCH] xfs: fix signed integer overflow Xie XiuQi
2016-09-09  6:38 ` Xie XiuQi
2016-09-09  6:42 ` Joe Perches
2016-09-09  6:42   ` Joe Perches
2016-09-09  7:16   ` Xie XiuQi
2016-09-09  7:16     ` Xie XiuQi
2016-09-13  6:57     ` Dave Chinner
2016-09-13  6:57       ` Dave Chinner
2016-09-13  7:23       ` Xie XiuQi [this message]
2016-09-13  7:23         ` Xie XiuQi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=57D7A97B.4080901@huawei.com \
    --to=xiexiuqi@huawei.com \
    --cc=david@fromorbit.com \
    --cc=joe@perches.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=xfs@oss.sgi.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.