From: Hyunchul Lee <hyc.lee@gmail.com> mainline inclusion from mainline-5.15-rc1 commit 72d6cbb533d4309734606027fe083c4edb0aa7aa category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I60T7G CVE: NA Reference: https://git.kernel.org/torvalds/linux/c/72d6cbb533d4 ------------------------------- Becase smb direct header is mapped and msg->num_sge already is incremented, the decrement should be removed from the condition. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Zhong Jinghua <zhongjinghua@huawei.com> --- fs/ksmbd/transport_rdma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c index 58f530056ac0..52b2556e76b1 100644 --- a/fs/ksmbd/transport_rdma.c +++ b/fs/ksmbd/transport_rdma.c @@ -1168,7 +1168,7 @@ static int smb_direct_post_send_data(struct smb_direct_transport *t, pr_err("failed to map buffer\n"); ret = -ENOMEM; goto err; - } else if (sg_cnt + msg->num_sge > SMB_DIRECT_MAX_SEND_SGES - 1) { + } else if (sg_cnt + msg->num_sge > SMB_DIRECT_MAX_SEND_SGES) { pr_err("buffer not fitted into sges\n"); ret = -E2BIG; ib_dma_unmap_sg(t->cm_id->device, sg, sg_cnt, -- 2.31.1