[B.A.T.M.A.N.] [PATCH 04/10] batctl: Handle nlmsg_alloc errors

nlmsg_alloc may return NULL on errors. The processing has to be aborted when this happens.

Fixes: d8dd1ff1a0fe ("batctl: Use netlink to replace some of debugfs") Signed-off-by: Sven Eckelmann sven.eckelmann@openmesh.com --- netlink.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)

diff --git a/netlink.c b/netlink.c index 7fb1ee1..e3d7892 100644 --- a/netlink.c +++ b/netlink.c @@ -302,6 +302,11 @@ static char *netlink_get_info(int ifindex, uint8_t nl_cmd, const char *header) return NULL;

msg = nlmsg_alloc(); + if (!msg) { + nl_socket_free(sock); + return NULL; + } + genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, 0, BATADV_CMD_GET_MESH_INFO, 1);

@@ -399,6 +404,11 @@ int netlink_print_routing_algos(void) return -EOPNOTSUPP;

msg = nlmsg_alloc(); + if (!msg) { + last_err = -ENOMEM; + goto err_free_sock; + } + genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, NLM_F_DUMP, BATADV_CMD_GET_ROUTING_ALGOS, 1);

@@ -415,6 +425,8 @@ int netlink_print_routing_algos(void) nl_cb_err(cb, NL_CB_CUSTOM, print_error, NULL);

nl_recvmsgs(sock, cb); + +err_free_sock: nl_socket_free(sock);

if (!last_err) @@ -1131,6 +1143,9 @@ static int netlink_print_common(char *mesh_iface, char *orig_iface, header);

msg = nlmsg_alloc(); + if (!msg) + continue; + genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, NLM_F_DUMP, nl_cmd, 1);