From: "Liam R. Howlett" <Liam.Howlett@oracle.com> mainline inclusion from mainline-v6.7-rc1 commit 7771dcf019dde5998380c40deec0b42f5df9d9a3 category: performance bugzilla: https://gitee.com/openeuler/kernel/issues/I9AYM3 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- The bulk allocation is iterating through an array and storing enough memory for the entire bulk allocation instead of a single array entry. Only allocate an array element of the size set in the kmem_cache. Link: https://lkml.kernel.org/r/20230929201359.2857583-1-Liam.Howlett@oracle.com Fixes: cc86e0c2f306 ("radix tree test suite: add support for slab bulk APIs") Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reported-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: ZhangPeng <zhangpeng362@huawei.com> --- tools/testing/radix-tree/linux.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c index d587a558997f..61fe2601cb3a 100644 --- a/tools/testing/radix-tree/linux.c +++ b/tools/testing/radix-tree/linux.c @@ -165,9 +165,9 @@ int kmem_cache_alloc_bulk(struct kmem_cache *cachep, gfp_t gfp, size_t size, for (i = 0; i < size; i++) { if (cachep->align) { posix_memalign(&p[i], cachep->align, - cachep->size * size); + cachep->size); } else { - p[i] = malloc(cachep->size * size); + p[i] = malloc(cachep->size); } if (cachep->ctor) cachep->ctor(p[i]); -- 2.25.1