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-rw-r--r--security/tomoyo/common.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index 7556315c1978..2b7b1a123600 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -459,8 +459,16 @@ static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
if (profile == &tomoyo_default_profile)
return -EINVAL;
if (!strcmp(data, "COMMENT")) {
- const struct tomoyo_path_info *old_comment = profile->comment;
- profile->comment = tomoyo_get_name(cp);
+ static DEFINE_SPINLOCK(lock);
+ const struct tomoyo_path_info *new_comment
+ = tomoyo_get_name(cp);
+ const struct tomoyo_path_info *old_comment;
+ if (!new_comment)
+ return -ENOMEM;
+ spin_lock(&lock);
+ old_comment = profile->comment;
+ profile->comment = new_comment;
+ spin_unlock(&lock);
tomoyo_put_name(old_comment);
return 0;
}