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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 <cgxu519@gmx.com>
Signed-off-by: David Sterba <dsterba@suse.com>
hifive-unleashed-5.1
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;