[PATCH] sysfs: Don't leak secdata when a sysfs_dirent is freed.

From: Eric W. Biederman
Date: Wed Nov 04 2009 - 05:50:20 EST

While refreshing my sysfs patches I noticed a leak in the secdata
implementation. We don't free the secdata when we free the
sysfs dirent.

This is a bug in 2.6.32-rc5 that we really should close.

Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxxxxxxxx>

fs/sysfs/dir.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 5fad489..e020183 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -21,6 +21,7 @@
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/security.h>
#include "sysfs.h"

@@ -285,6 +286,9 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
if (sysfs_type(sd) & SYSFS_COPY_NAME)
+ if (sd->s_iattr && sd->s_iattr->ia_secdata)
+ security_release_secctx(sd->s_iattr->ia_secdata,
+ sd->s_iattr->ia_secdata_len);
kmem_cache_free(sysfs_dir_cachep, sd);

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