9p: fix memory leak in v9fs_parse_options()
If match_strdup() fail this function exits without freeing the options string.
Signed-off-by: Venkateswararao Jujjuri <jvrao@us.ibm.com>
Sigend-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 6848788..7d6c213 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -103,8 +103,10 @@
return 0;
tmp_options = kstrdup(opts, GFP_KERNEL);
- if (!tmp_options)
+ if (!tmp_options) {
+ ret = -ENOMEM;
goto fail_option_alloc;
+ }
options = tmp_options;
while ((p = strsep(&options, ",")) != NULL) {
@@ -160,8 +162,12 @@
break;
case Opt_cache:
s = match_strdup(&args[0]);
- if (!s)
- goto fail_option_alloc;
+ if (!s) {
+ ret = -ENOMEM;
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "problem allocating copy of cache arg\n");
+ goto free_and_return;
+ }
if (strcmp(s, "loose") == 0)
v9ses->cache = CACHE_LOOSE;
@@ -174,8 +180,12 @@
case Opt_access:
s = match_strdup(&args[0]);
- if (!s)
- goto fail_option_alloc;
+ if (!s) {
+ ret = -ENOMEM;
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "problem allocating copy of access arg\n");
+ goto free_and_return;
+ }
v9ses->flags &= ~V9FS_ACCESS_MASK;
if (strcmp(s, "user") == 0)
@@ -196,13 +206,10 @@
}
}
+free_and_return:
kfree(tmp_options);
- return ret;
-
fail_option_alloc:
- P9_DPRINTK(P9_DEBUG_ERROR,
- "failed to allocate copy of option argument\n");
- return -ENOMEM;
+ return ret;
}
/**
