Messages in this thread | | | Date | Fri, 9 Mar 2012 07:33:34 +0900 | Subject | Re: [PATCH] Fix memory leak in sysfs_sd_setsecdata(). | From | Masami Ichikawa <> |
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Hi,
Eric, thank you for the review. Greg, thenk you for apply my patch.
On Fri, Mar 9, 2012 at 6:43 AM, Eric W. Biederman <ebiederm@xmission.com> wrote: > Greg KH <gregkh@linuxfoundation.org> writes: > >> On Thu, Mar 08, 2012 at 01:02:20PM -0800, Eric W. Biederman wrote: >>> Masami Ichikawa <masami256@gmail.com> writes: >>> >>> > This patch fixies follwing two memory leak patterns that reported by kmemleak. >>> > sysfs_sd_setsecdata() is called during sys_lsetxattr() operation. >>> > It checks sd->s_iattr is NULL or not. Then if it is NULL, it calls >>> > sysfs_init_inode_attrs() to allocate memory. >>> > That code is this. >>> >>> I don't know how you count two memory leaks. But there is definitely a >>> leak here sd->s_iattr is allocated and then never assigned. It looks >>> like I introduced that leak when I re-factored the code to protect >>> the code with sysfs_mutex at the end of 2009. >>> >>> I am surprise the securlity label crowd has not been screaming about >>> selinux protection not working on sysfs for the last two years. >>> >>> I have reviewed the code and the fix looks obvious and correct. >>> >>> Greg can you pick this up? >> >> I applied it a while ago to my tree already :) > > Odd I didn't see it linux-next when I looked an hour or so ago. > > As long as it is there and it makes it to stable. > > Eric > I saw my patch in linux-next tree. http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commit;h=93518dd2ebafcc761a8637b2877008cfd748c202
Cheers, -- Masami Ichikawa gmail: masami256@gmail.com Fedora project: masami@fedoraproject.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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