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

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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 <cgxu519@gmx.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Chengguang Xu 2018-05-22 12:24:25 +08:00 committed by David Sterba
parent b50694381c
commit 84ae6f829f
1 changed files with 1 additions and 0 deletions
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fs/affs/super.c
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@ -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;