Re: [PATCH] target: Fix memory leak infd_set_configfs_dev_params().

[Jesper Juhl]

On Sun, 16 Jan 2011, Nicholas A. Bellinger wrote:

> On Sun, 2011-01-16 at 23:59 +0100, Jesper Juhl wrote:
> > On Sun, 16 Jan 2011, Nicholas A. Bellinger wrote:
> > 
> > > On Sun, 2011-01-16 at 20:17 +0100, Jesper Juhl wrote:
> > > > match_strdup() dynamically allocates memory and it is the responsabillity 
> > > > of the caller to free that memory. In 
> > > > drivers/target/target_core_file.c::fd_set_configfs_dev_params() two calls 
> > > > are made to match_strdup() and in neither case is the allocated memory 
> > > > freed, but instead it is leaked.
> > > > 
> > > > This patch should take care of the problem by kfree()'ing the allocated 
> > > > memory once it is no longer needed. It also makes sure to return -ENOMEM 
> > > > if the memory allocation in match_strdup() should fail.
> > > > 
> > > > Please review and consider for inclusion.
> > > > 
> > > > Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
> > > 
> > > Ugh, this was my fault during the recent v4.0 configfs parameter
> > > conversion.  Committed as 5c45b37 in lio-core-2.6.git/linus-38-rc1 and I
> > > will fix up the other handful of match_strdup() breakage and carry into
> > > scsi-post-merge-2.6.git/for-jejb shortly.
> > > 
> > > Thanks for catching this..
> > > 
> > 
> > You're welcome.
> > Yes, I did see a bunch of other match_strdup() related problems, but I 
> > thought I'd just fix up one file initially to see the general reaction, 
> > then do the rest later when this one had been merged. but if you want to 
> > fix up the remainder, feel free.
> > 
> > I guess we can merge this patch as a starting point?
> > 
> 
> Sure, the other two follow-up match_strdup() memory leak bugfix patches
> for target/iblock and target_core_configfs.c APTPL metadata token
> parsing have been included into the scsi-post-merge-2.6.git/for-jejb
> queue.
> 
Ok, I assume you'll add my patch there as well?

> Thanks again!
> 
np

-- 
Jesper Juhl <jj@xxxxxxxxxxxxx>            http://www.chaosbits.net/
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