From d7278bd7d1aab5c6d35fd271eeb860548f0bd0bb Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Fri, 9 Jul 2010 14:07:12 -0500 Subject: [PATCH] slub: Check kasprintf results in kmem_cache_init() Small allocations may fail during slab bringup which is fatal. Add a BUG_ON() so that we fail immediately rather than failing later during sysfs processing. Acked-by: David Rientjes Signed-off-by: Christoph Lameter Signed-off-by: Pekka Enberg --- mm/slub.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 2c1190351726..8655be5b7404 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3118,9 +3118,12 @@ void __init kmem_cache_init(void) slab_state = UP; /* Provide the correct kmalloc names now that the caches are up */ - for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++) - kmalloc_caches[i]. name = - kasprintf(GFP_NOWAIT, "kmalloc-%d", 1 << i); + for (i = KMALLOC_SHIFT_LOW; i < SLUB_PAGE_SHIFT; i++) { + char *s = kasprintf(GFP_NOWAIT, "kmalloc-%d", 1 << i); + + BUG_ON(!s); + kmalloc_caches[i].name = s; + } #ifdef CONFIG_SMP register_cpu_notifier(&slab_notifier); -- 2.20.1