batctl/patches/0013-batctl-Handle-allocation-error-in-vlan_get_link_pars.patch

   1 From: Sven Eckelmann <sven@narfation.org>
   2 Date: Sat, 2 Dec 2017 08:45:59 +0100
   3 Subject: [PATCH] batctl: Handle allocation error in vlan_get_link_parse
   4
   5 The malloc could fail and return NULL. In this case, the processing of the
   6 current interface index has to be stopped to avoid writing to NULL (which
   7 would cause a segfault).
   8
   9 Fixes: d29288fe0583 ("batctl: implement vlan-to-link helper functions")
  10 Signed-off-by: Sven Eckelmann <sven@narfation.org>
  11 Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
  12
  13 Origin: upstream, https://git.open-mesh.org/batctl.git/commit/2ea390ce9bdda39d3c15bd9470009f56f42d5ed9
  14 ---
  15  functions.c | 3 +++
  16  1 file changed, 3 insertions(+)
  17
  18 diff --git a/functions.c b/functions.c
  19 index 1c96e6241d01b83a136ff135bee8dd780629f7aa..f91f26f4045766474d5dc109d76e20afd91a7791 100644
  20 --- a/functions.c
  21 +++ b/functions.c
  22 @@ -812,6 +812,9 @@ static int vlan_get_link_parse(struct nl_msg *msg, void *arg)
  23         idx = *(int *)nla_data(tb[IFLA_LINK]);
  24         free(nl_arg->iface);
  25         nl_arg->iface = malloc(IFNAMSIZ + 1);
  26 +       if (!nl_arg->iface)
  27 +               goto err;
  28 +
  29         if (!if_indextoname(idx, nl_arg->iface))
  30                 goto err;
  31