From: walter harms <wharms@bfs.de>
To: David Howells <dhowells@redhat.com>
Cc: colin.king@canonical.com, joe@perches.com, jaltman@auristor.com,
linux-afs@lists.infradead.org, kernel-janitors@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] afs: Fix afs_xattr_get_yfs() to not try freeing an error value
Date: Sun, 12 May 2019 20:44:11 +0200 [thread overview]
Message-ID: <5CD8697B.6010004@bfs.de> (raw)
In-Reply-To: <31808.1557684645@warthog.procyon.org.uk>
Am 12.05.2019 20:10, schrieb David Howells:
> walter harms <wharms@bfs.de> wrote:
>
>>> + ret = dsize;
>>> + if (size > 0) {
>>> + if (dsize > size) {
>>> + ret = -ERANGE;
>>> + goto error_key;
>>> }
>>> + memcpy(buffer, data, dsize);
>>> }
>>>
>>
>> i am confused: if size is <= 0 then the error is in dsize ?
>
> See this bit, before that hunk:
>
>> + if (ret < 0)
>> + goto error_key;
>
> David
>
Sorry, you misunderstood me, my fault, i did not see that size is unsigned.
NTL i do not think size=0 is useful.
You get size from outside, and if i follow the flow correct
the first use of it is to check size>0.
perhaps you can check size at start and simply return.
Now if size==0 it will return dsize and give the impression
that buffer is used (it is not).
while you are there:
flags |= YFS_ACL_WANT_ACL is always flags = YFS_ACL_WANT_ACL;
since flags is 0 at this point.
IMHO that sould be moved to the strcmp() section.
hope that helps,
re,
wh
next prev parent reply other threads:[~2019-05-12 18:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-12 7:45 [PATCH 1/2] afs: Fix incorrect error handling in afs_xattr_get_acl() David Howells
2019-05-12 7:45 ` [PATCH 2/2] afs: Fix afs_xattr_get_yfs() to not try freeing an error value David Howells
2019-05-12 16:07 ` walter harms
2019-05-12 18:10 ` David Howells
2019-05-12 18:44 ` walter harms [this message]
2019-05-12 20:06 ` David Howells
2019-05-13 10:13 ` walter harms
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