slab: improve checking for invalid gfp_flags

[mirror_ubuntu-bionic-kernel.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index cf4f3c480b983c56be8a8e9f24ad7922e92c296e..386bbed76e945c32d758f4e9b0f396ef0a4714af 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1377,7 +1377,10 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
        int order;
        int idx;
 
-       BUG_ON(flags & GFP_SLAB_BUG_MASK);
+       if (unlikely(flags & GFP_SLAB_BUG_MASK)) {
+               pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK);
+               BUG();
+       }
 
        page = allocate_slab(s,
                flags & (GFP_RECLAIM_MASK | GFP_CONSTRAINT_MASK), node);