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| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2017-12-22 09:39:01 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-27 13:37:27 -0500 |
| commit | 66261da169263f90c431741886b90b0982dda981 (patch) | |
| tree | ad18de18bd14bf8b173a5f5ee48b53ee3c8c4a39 /net/rds | |
| parent | b319109396d6ddf1587a54e33f89fd3bea7c66db (diff) | |
| download | linux-66261da169263f90c431741886b90b0982dda981.tar.gz | |
rds: tcp: cleanup if kmem_cache_alloc fails in rds_tcp_conn_alloc()
If kmem_cache_alloc() fails in the middle of the for() loop, cleanup anything that might have been allocated so far. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds')
| -rw-r--r-- | net/rds/tcp.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/net/rds/tcp.c b/net/rds/tcp.c index a61a498187ce..2e554ef6d75f 100644 --- a/net/rds/tcp.c +++ b/net/rds/tcp.c @@ -270,16 +270,33 @@ static int rds_tcp_laddr_check(struct net *net, __be32 addr) return -EADDRNOTAVAIL; } +static void rds_tcp_conn_free(void *arg) +{ + struct rds_tcp_connection *tc = arg; + unsigned long flags; + + rdsdebug("freeing tc %p\n", tc); + + spin_lock_irqsave(&rds_tcp_conn_lock, flags); + if (!tc->t_tcp_node_detached) + list_del(&tc->t_tcp_node); + spin_unlock_irqrestore(&rds_tcp_conn_lock, flags); + + kmem_cache_free(rds_tcp_conn_slab, tc); +} + static int rds_tcp_conn_alloc(struct rds_connection *conn, gfp_t gfp) { struct rds_tcp_connection *tc; - int i; + int i, j; + int ret = 0; for (i = 0; i < RDS_MPATH_WORKERS; i++) { tc = kmem_cache_alloc(rds_tcp_conn_slab, gfp); - if (!tc) - return -ENOMEM; - + if (!tc) { + ret = -ENOMEM; + break; + } mutex_init(&tc->t_conn_path_lock); tc->t_sock = NULL; tc->t_tinc = NULL; @@ -296,22 +313,11 @@ static int rds_tcp_conn_alloc(struct rds_connection *conn, gfp_t gfp) rdsdebug("rds_conn_path [%d] tc %p\n", i, conn->c_path[i].cp_transport_data); } - - return 0; -} - -static void rds_tcp_conn_free(void *arg) -{ - struct rds_tcp_connection *tc = arg; - unsigned long flags; - rdsdebug("freeing tc %p\n", tc); - - spin_lock_irqsave(&rds_tcp_conn_lock, flags); - if (!tc->t_tcp_node_detached) - list_del(&tc->t_tcp_node); - spin_unlock_irqrestore(&rds_tcp_conn_lock, flags); - - kmem_cache_free(rds_tcp_conn_slab, tc); + if (ret) { + for (j = 0; j < i; j++) + rds_tcp_conn_free(conn->c_path[j].cp_transport_data); + } + return ret; } static bool list_has_conn(struct list_head *list, struct rds_connection *conn) |