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authorShakeel Butt <shakeelb@google.com>2019-01-08 15:22:57 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-16 22:03:23 +0100
commit278ad4849088e370af59c11e6c7b32d31d02bd7a (patch)
parent1ef2da729fa7c08f1271194de61d9f863efd6c7e (diff)
fork, memcg: fix cached_stacks case
commit ba4a45746c362b665e245c50b870615f02f34781 upstream. Commit 5eed6f1dff87 ("fork,memcg: fix crash in free_thread_stack on memcg charge fail") fixes a crash caused due to failed memcg charge of the kernel stack. However the fix misses the cached_stacks case which this patch fixes. So, the same crash can happen if the memcg charge of a cached stack is failed. Link: http://lkml.kernel.org/r/20190102180145.57406-1-shakeelb@google.com Fixes: 5eed6f1dff87 ("fork,memcg: fix crash in free_thread_stack on memcg charge fail") Signed-off-by: Shakeel Butt <shakeelb@google.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Rik van Riel <riel@surriel.com> Cc: Rik van Riel <riel@surriel.com> Cc: Roman Gushchin <guro@fb.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Tejun Heo <tj@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 3c16bc490583..906cd0c13d15 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -221,6 +221,7 @@ static unsigned long *alloc_thread_stack_node(struct task_struct *tsk, int node)
memset(s->addr, 0, THREAD_SIZE);
tsk->stack_vm_area = s;
+ tsk->stack = s->addr;
return s->addr;