From: ethanwu <ethanwu@synology.com>
Date: Thu, 11 Jul 2024 06:47:56 +0000 (+0800)
Subject: ceph: fix incorrect kmalloc size of pagevec mempool
X-Git-Tag: v6.10.3~19
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=dd296402e681670265aaa2711892eab6ef8f507b;p=thirdparty%2Fkernel%2Fstable.git

ceph: fix incorrect kmalloc size of pagevec mempool

[ Upstream commit 03230edb0bd831662a7c08b6fef66b2a9a817774 ]

The kmalloc size of pagevec mempool is incorrectly calculated.
It misses the size of page pointer and only accounts the number for the array.

Fixes: a0102bda5bc0 ("ceph: move sb->wb_pagevec_pool to be a global mempool")
Signed-off-by: ethanwu <ethanwu@synology.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 885cb5d4e771a..0cdf84cd17912 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -961,7 +961,8 @@ static int __init init_caches(void)
 	if (!ceph_mds_request_cachep)
 		goto bad_mds_req;
 
-	ceph_wb_pagevec_pool = mempool_create_kmalloc_pool(10, CEPH_MAX_WRITE_SIZE >> PAGE_SHIFT);
+	ceph_wb_pagevec_pool = mempool_create_kmalloc_pool(10,
+	    (CEPH_MAX_WRITE_SIZE >> PAGE_SHIFT) * sizeof(struct page *));
 	if (!ceph_wb_pagevec_pool)
 		goto bad_pagevec_pool;