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authorAkinobu Mita <akinobu.mita@gmail.com>2007-07-14 11:03:35 +0900
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-18 15:49:49 -0700
commit01da2425f327d7ac673e594bee5655523115970b (patch)
tree44a33a3fa5e088dfe63e9485823400d12aab3b0b /fs/sysfs
parent3f8df781fc5f9ee5253a54ba669e1c8872844b86 (diff)
downloadlinux-01da2425f327d7ac673e594bee5655523115970b.tar.bz2
sysfs: avoid kmem_cache_free(NULL)
kmem_cache_free() with NULL is not allowed. But it may happen if out of memory error is triggered in sysfs_new_dirent(). This patch fixes that error handling. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/sysfs')
-rw-r--r--fs/sysfs/dir.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index aee966c44aac..2e6775a836f2 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -361,20 +361,20 @@ static struct dentry_operations sysfs_dentry_ops = {
struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
{
char *dup_name = NULL;
- struct sysfs_dirent *sd = NULL;
+ struct sysfs_dirent *sd;
if (type & SYSFS_COPY_NAME) {
name = dup_name = kstrdup(name, GFP_KERNEL);
if (!name)
- goto err_out;
+ return NULL;
}
sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
if (!sd)
- goto err_out;
+ goto err_out1;
if (sysfs_alloc_ino(&sd->s_ino))
- goto err_out;
+ goto err_out2;
atomic_set(&sd->s_count, 1);
atomic_set(&sd->s_active, 0);
@@ -386,9 +386,10 @@ struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
return sd;
- err_out:
- kfree(dup_name);
+ err_out2:
kmem_cache_free(sysfs_dir_cachep, sd);
+ err_out1:
+ kfree(dup_name);
return NULL;
}