The patch titled
kernel/user.c: fix freeing user_struct in user cache
has been added to the -mm tree. Its filename is
kernel-userc-fix-freeing-user_struct-in-user-cache.patch
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------------------------------------------------------
Subject: kernel/user.c: fix freeing user_struct in user cache
From: Hillf Danton <dhillf@xxxxxxxxx>
When racing on adding into user cache, the new allocated from mm slab
is freed without putting user namespace.
Since the user namespace is already operated by getting, putting has
to be issued.
Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
Acked-by: Serge Hallyn <serge@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/user.c | 1 +
1 file changed, 1 insertion(+)
diff -puN kernel/user.c~kernel-userc-fix-freeing-user_struct-in-user-cache kernel/user.c
--- a/kernel/user.c~kernel-userc-fix-freeing-user_struct-in-user-cache
+++ a/kernel/user.c
@@ -158,6 +158,7 @@ struct user_struct *alloc_uid(struct use
spin_lock_irq(&uidhash_lock);
up = uid_hash_find(uid, hashent);
if (up) {
+ put_user_ns(ns);
key_put(new->uid_keyring);
key_put(new->session_keyring);
kmem_cache_free(uid_cachep, new);
_
Patches currently in -mm which might be from dhillf@xxxxxxxxx are
linux-next.patch
kernel-userc-fix-freeing-user_struct-in-user-cache.patch
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