diff options
| author | Adrian Bunk <bunk@stusta.de> | 2006-03-15 17:37:32 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-15 09:37:34 -0800 |
| commit | f13b83580acef03a36c785dccc534ccdd7e43084 (patch) | |
| tree | 1252d76d1e36602024c6dcf0c9afc5688e7bde85 /fs/namespace.c | |
| parent | 74c002410548c7cb1744b45d17a5fa21da515b63 (diff) | |
| download | lwn-f13b83580acef03a36c785dccc534ccdd7e43084.tar.gz lwn-f13b83580acef03a36c785dccc534ccdd7e43084.zip | |
[PATCH] fs/namespace.c:dup_namespace(): fix a use after free
The Coverity checker spotted the following bug in dup_namespace():
<-- snip -->
if (!new_ns->root) {
up_write(&namespace_sem);
kfree(new_ns);
goto out;
}
...
out:
return new_ns;
<-- snip -->
Callers expect a non-NULL result to not be freed.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 058a44865beb..39c81a8d6316 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1338,7 +1338,7 @@ struct namespace *dup_namespace(struct task_struct *tsk, struct fs_struct *fs) new_ns = kmalloc(sizeof(struct namespace), GFP_KERNEL); if (!new_ns) - goto out; + return NULL; atomic_set(&new_ns->count, 1); INIT_LIST_HEAD(&new_ns->list); @@ -1352,7 +1352,7 @@ struct namespace *dup_namespace(struct task_struct *tsk, struct fs_struct *fs) if (!new_ns->root) { up_write(&namespace_sem); kfree(new_ns); - goto out; + return NULL; } spin_lock(&vfsmount_lock); list_add_tail(&new_ns->list, &new_ns->root->mnt_list); @@ -1393,7 +1393,6 @@ struct namespace *dup_namespace(struct task_struct *tsk, struct fs_struct *fs) if (altrootmnt) mntput(altrootmnt); -out: return new_ns; } |