diff mbox series

block: always set bslab->slab to NULL when creating new slab

Message ID 20201014083608.310098-1-cgxu519@mykernel.net
State New, archived
Headers show
Series block: always set bslab->slab to NULL when creating new slab | expand

Commit Message

Chengguang Xu Oct. 14, 2020, 8:36 a.m. UTC
When fail to create new slab and if the entry slot is acquired
by extending bio_slab_max, bslab->slab will contain uninitialized
data and it may affect subsequent search.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
---
 block/bio.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/block/bio.c b/block/bio.c
index 640d0fb74a8b..01ece8dbfc7f 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -104,6 +104,7 @@  static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size)
 	bslab = &bio_slabs[entry];
 
 	snprintf(bslab->name, sizeof(bslab->name), "bio-%d", entry);
+	bslab->slab = NULL;
 	slab = kmem_cache_create(bslab->name, sz, ARCH_KMALLOC_MINALIGN,
 				 SLAB_HWCACHE_ALIGN, NULL);
 	if (!slab)