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-rw-r--r--kernel/signal.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 8498912..2a64304 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -180,7 +180,7 @@ int next_signal(struct sigpending *pending, sigset_t *mask)
/*
* allocate a new signal queue record
* - this may be called without locks if and only if t == current, otherwise an
- * appopriate lock must be held to protect t's user_struct
+ * appopriate lock must be held to stop the target task from exiting
*/
static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
int override_rlimit)
@@ -194,7 +194,7 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
* caller must be holding the RCU readlock (by way of a spinlock) and
* we use RCU protection here
*/
- user = __task_cred(t)->user;
+ user = get_uid(__task_cred(t)->user);
atomic_inc(&user->sigpending);
if (override_rlimit ||
atomic_read(&user->sigpending) <=
@@ -202,12 +202,14 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
q = kmem_cache_alloc(sigqueue_cachep, flags);
if (unlikely(q == NULL)) {
atomic_dec(&user->sigpending);
+ free_uid(user);
} else {
INIT_LIST_HEAD(&q->list);
q->flags = 0;
- q->user = get_uid(user);
+ q->user = user;
}
- return(q);
+
+ return q;
}
static void __sigqueue_free(struct sigqueue *q)
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