From dee49f203a7feef5d00c416b7dc7e34a7caba8e1 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Tue, 14 Oct 2014 12:35:08 -0700 Subject: [PATCH] rds: avoid calling sock_kfree_s() on allocation failure It is okay to free a NULL pointer but not okay to mischarge the socket optmem accounting. Compile test only. Reported-by: rucsoftsec@gmail.com Cc: Chien Yen Cc: Stephen Hemminger Signed-off-by: Cong Wang Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- net/rds/rdma.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 4e37c1cbe8b2..40084d843e9f 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -564,12 +564,12 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, if (rs->rs_bound_addr == 0) { ret = -ENOTCONN; /* XXX not a great errno */ - goto out; + goto out_ret; } if (args->nr_local > UIO_MAXIOV) { ret = -EMSGSIZE; - goto out; + goto out_ret; } /* Check whether to allocate the iovec area */ @@ -578,7 +578,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, iovs = sock_kmalloc(rds_rs_to_sk(rs), iov_size, GFP_KERNEL); if (!iovs) { ret = -ENOMEM; - goto out; + goto out_ret; } } @@ -696,6 +696,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm, if (iovs != iovstack) sock_kfree_s(rds_rs_to_sk(rs), iovs, iov_size); kfree(pages); +out_ret: if (ret) rds_rdma_free_op(op); else -- GitLab