From: Eric Sandeen <sandeen@sandeen.net>
To: Christoph Hellwig <hch@infradead.org>
Cc: Eric Sandeen <sandeen@redhat.com>, xfs@oss.sgi.com
Subject: Re: [PATCH 2/9 V2] xfsdump: Fix overflow of "question" string in Media_prompt_erase()
Date: Thu, 13 Nov 2014 12:00:07 -0600 [thread overview]
Message-ID: <5464F1A7.20008@sandeen.net> (raw)
In-Reply-To: <20141113173813.GA9959@infradead.org>
On 11/13/14 11:38 AM, Christoph Hellwig wrote:
>> + asprintf( &question,
>> + "overwrite data on media in drive %u?\n",
>> (unsigned int)drivep->d_index );
>
> Where is the error handling?
Well, ok.
The error handling ahead of this is crap; if the
function returns !ok, we change the media:
ok = Media_prompt_overwrite( drivep );
if ( intr_allowed && cldmgr_stop_requested( )) {
return RV_INTR;
}
if ( ! ok ) {
goto changemedia;
}
I don't want to try to understand and rework all the ways we can
back out of this if we don't have ~100 bytes available.
So, what would you prefer:
I could make a 110-byte array, and snprintf max 110 bytes to it.
Or I could asprintf, and exit the whole program if it fails.
I'm not trying to make xfsdump perfect, I'm trying to make it
suck less. ;)
-Eric
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next prev parent reply other threads:[~2014-11-13 18:00 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-12 18:57 [PATCH 0/9] Random xfsdump fixes Eric Sandeen
2014-11-12 18:57 ` [PATCH 1/9] xfsdump: don't try to close fd from failed open Eric Sandeen
2014-11-12 18:57 ` [PATCH 2/9] xfsdump: Fix overflow of "question" string in Media_prompt_erase() Eric Sandeen
2014-11-12 18:58 ` Christoph Hellwig
2014-11-12 19:05 ` [PATCH 2/9 V2] " Eric Sandeen
2014-11-13 17:38 ` Christoph Hellwig
2014-11-13 18:00 ` Eric Sandeen [this message]
2014-11-12 18:57 ` [PATCH 3/9] xfsdump: fix wrong test for hard stack limit change failure Eric Sandeen
2014-11-12 18:57 ` [PATCH 4/9] xfsdump: remove pointless if (dirty); Eric Sandeen
2014-11-13 17:35 ` Mark Tinguely
2014-11-13 17:47 ` Eric Sandeen
2014-11-13 19:02 ` Mark Tinguely
2014-11-12 18:57 ` [PATCH 5/9] xfsdump: remove some unreachable code Eric Sandeen
2014-11-12 18:57 ` [PATCH 6/9] xfsdump: free suboptstrs if mlog_init1 fails Eric Sandeen
2014-11-12 18:57 ` [PATCH 7/9] xfsdump: free allocated persistent paths Eric Sandeen
2014-11-12 18:57 ` [PATCH 8/9] xfsdump: children[] is an array of child pointers, not of child structures Eric Sandeen
2014-11-12 18:57 ` [PATCH 9/9] xfsdump: fix uninit ackstr in content_mediachange_query() Eric Sandeen
2014-11-13 18:10 ` Mark Tinguely
2014-11-13 19:23 ` Eric Sandeen
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