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slub: fix SLUB_RESILIENCY_TEST for dynamic kmalloc caches

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Now that the kmalloc_caches array is dynamically allocated at boot,
SLUB_RESILIENCY_TEST needs to be fixed to pass the correct type.

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
David Rientjes 2010-08-25 16:32:27 -07:00 committed by Pekka Enberg
parent 8de66a0c02
commit a016471a16
1 changed files with 8 additions and 6 deletions
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14
mm/slub.c
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@ -3498,6 +3498,8 @@ static void resiliency_test(void)
{
u8 *p;
BUILD_BUG_ON(KMALLOC_MIN_SIZE > 16 || SLUB_PAGE_SHIFT < 10);
printk(KERN_ERR "SLUB resiliency testing\n");
printk(KERN_ERR "-----------------------\n");
printk(KERN_ERR "A. Corruption after allocation\n");
@ -3507,7 +3509,7 @@ static void resiliency_test(void)
printk(KERN_ERR "\n1. kmalloc-16: Clobber Redzone/next pointer"
" 0x12->0x%p\n\n", p + 16);
validate_slab_cache(kmalloc_caches + 4);
validate_slab_cache(kmalloc_caches[4]);
/* Hmmm... The next two are dangerous */
p = kzalloc(32, GFP_KERNEL);
@ -3517,7 +3519,7 @@ static void resiliency_test(void)
printk(KERN_ERR
"If allocated object is overwritten then not detectable\n\n");
validate_slab_cache(kmalloc_caches + 5);
validate_slab_cache(kmalloc_caches[5]);
p = kzalloc(64, GFP_KERNEL);
p += 64 + (get_cycles() & 0xff) * sizeof(void *);
*p = 0x56;
@ -3525,27 +3527,27 @@ static void resiliency_test(void)
p);
printk(KERN_ERR
"If allocated object is overwritten then not detectable\n\n");
validate_slab_cache(kmalloc_caches + 6);
validate_slab_cache(kmalloc_caches[6]);
printk(KERN_ERR "\nB. Corruption after free\n");
p = kzalloc(128, GFP_KERNEL);
kfree(p);
*p = 0x78;
printk(KERN_ERR "1. kmalloc-128: Clobber first word 0x78->0x%p\n\n", p);
validate_slab_cache(kmalloc_caches + 7);
validate_slab_cache(kmalloc_caches[7]);
p = kzalloc(256, GFP_KERNEL);
kfree(p);
p[50] = 0x9a;
printk(KERN_ERR "\n2. kmalloc-256: Clobber 50th byte 0x9a->0x%p\n\n",
p);
validate_slab_cache(kmalloc_caches + 8);
validate_slab_cache(kmalloc_caches[8]);
p = kzalloc(512, GFP_KERNEL);
kfree(p);
p[512] = 0xab;
printk(KERN_ERR "\n3. kmalloc-512: Clobber redzone 0xab->0x%p\n\n", p);
validate_slab_cache(kmalloc_caches + 9);
validate_slab_cache(kmalloc_caches[9]);
}
#else
static void resiliency_test(void) {};