Messages in this thread Patch in this message | | | Date | Wed, 15 May 2019 14:44:57 +0800 | From | Gen Zhang <> | Subject | [Patch] slub: Fix a missing-check bug in mm/slub.c file of Linux 5.1.1 |
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Pointer s is allocated with kmem_cache_zalloc(). And s is used in the follwoing codes. However, when kmem_cache_zalloc fails, using s will cause null pointer dereference and the kernel will go wrong. Thus we check whether the kmem_cache_zalloc fails.
Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
--- --- mm/slub.c +++ mm/slub.c @@ -4201,6 +4201,8 @@ static struct kmem_cache * __init bootst { int node; struct kmem_cache *s = kmem_cache_zalloc(kmem_cache, GFP_NOWAIT); + if (!s) + return ERR_PTR(-ENOMEM); struct kmem_cache_node *n; memcpy(s, static_cache, kmem_cache->object_size); ---
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