5.15-stable review patch. If anyone has any objections, please let me know.
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From: ethanwu ethanwu@synology.com
[ 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 --- fs/ceph/super.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 1723ec21cd470..b5ed6d9a19f4a 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -783,7 +783,8 @@ 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;