affs: fix potential memory leak when parsing option 'prefix'

When specifying option 'prefix' multiple times, current option parsing will cause memory leak. Hence, call kfree for previous one in this case. Signed-off-by: Chengguang Xu <[email protected]> Signed-off-by: David Sterba <[email protected]>
noroot · May 28, 2018 · 84ae6f8 · 84ae6f8
1 parent b506943
commit 84ae6f8
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/fs/affs/super.c b/fs/affs/super.c
@@ -241,6 +241,7 @@ parse_options(char *options, kuid_t *uid, kgid_t *gid, int *mode, int *reserved,
 			affs_set_opt(*mount_opts, SF_NO_TRUNCATE);
 			break;
 		case Opt_prefix:
+			kfree(*prefix);
 			*prefix = match_strdup(&args[0]);
 			if (!*prefix)
 				return 0;