Repository : ssh://git@open-mesh.org/batctl

On branch : master

commit 0a14f8800dac67d706827e9be7745e2319f5412c Author: Sven Eckelmann sven.eckelmann@openmesh.com Date: Thu Nov 23 15:04:40 2017 +0100

batctl: Handle nl_cb_alloc errors

nl_cb_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 Signed-off-by: Simon Wunderlich sw@simonwunderlich.de

0a14f8800dac67d706827e9be7745e2319f5412c netlink.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/netlink.c b/netlink.c index d7aeb9a..b95063a 100644 --- a/netlink.c +++ b/netlink.c @@ -320,11 +320,15 @@ static char *netlink_get_info(int ifindex, uint8_t nl_cmd, const char *header) nlmsg_free(msg);

cb = nl_cb_alloc(NL_CB_DEFAULT); + if (!cb) + goto err_free_sock; + nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, info_callback, &opts); nl_cb_err(cb, NL_CB_CUSTOM, print_error, NULL);

nl_recvmsgs(sock, cb);

+err_free_sock: nl_socket_free(sock);

return opts.remaining_header; @@ -425,6 +429,11 @@ int netlink_print_routing_algos(void) opts.remaining_header = strdup("Available routing algorithms:\n");

cb = nl_cb_alloc(NL_CB_DEFAULT); + if (!cb) { + last_err = -ENOMEM; + goto err_free_sock; + } + nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, netlink_print_common_cb, &opts); nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, stop_callback, NULL); @@ -1134,9 +1143,14 @@ static int netlink_print_common(char *mesh_iface, char *orig_iface, } }

+ cb = nl_cb_alloc(NL_CB_DEFAULT); + if (!cb) { + last_err = -ENOMEM; + goto err_free_sock; + } + bat_hosts_init(read_opt);

- cb = nl_cb_alloc(NL_CB_DEFAULT); nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, netlink_print_common_cb, &opts); nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, stop_callback, NULL); nl_cb_err(cb, NL_CB_CUSTOM, print_error, NULL); @@ -1181,6 +1195,7 @@ static int netlink_print_common(char *mesh_iface, char *orig_iface,

bat_hosts_free();

+err_free_sock: nl_socket_free(sock);

return last_err;