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lib/lru_cache: fix error free handing in lc_create 

When kmem_cache_alloc in function lc_create returns null, we will
free the memory already allocated. The loop of kmem_cache_free
is wrong, especially:
  i = 0  ==> do wrong loop
  i > 0  ==> do not free element[0]

Link: https://lkml.kernel.org/r/20220618082521.7082-1-wuchi.zero@gmail.com
Signed-off-by: wuchi <wuchi.zero@gmail.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Christoph Bhmwalder <christoph.boehmwalder@linbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
wuchi 2022-06-18 16:25:21 +08:00 committed by akpm
parent 5a704629f2
commit 5a66fce95b
1 changed files with 2 additions and 2 deletions
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4
lib/lru_cache.c
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@ -147,8 +147,8 @@ struct lru_cache *lc_create(const char *name, struct kmem_cache *cache,
return lc; return lc;
/* else: could not allocate all elements, give up */ /* else: could not allocate all elements, give up */
for (i--; i; i--) { while (i) {
void *p = element[i]; void *p = element[--i];
kmem_cache_free(cache, p - e_off); kmem_cache_free(cache, p - e_off);
} }
kfree(lc); kfree(lc);