* [PATCH] block: always set bslab->slab to NULL when creating new slab
@ 2020-10-14 8:36 Chengguang Xu
0 siblings, 0 replies; only message in thread
From: Chengguang Xu @ 2020-10-14 8:36 UTC (permalink / raw)
To: axboe; +Cc: linux-block, Chengguang Xu
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 --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)
--
2.18.4
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2020-10-14 8:36 [PATCH] block: always set bslab->slab to NULL when creating new slab Chengguang Xu
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