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zebra: Prevent memory leak if route is rejected early

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When receiving a route via zapi, if the route is rejected
there exists a code path where we would not free the corresponding
re created.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2021-08-06 16:00:32 -04:00
parent d04e7788c1
commit f94a7703c0
1 changed files with 7 additions and 0 deletions
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7
zebra/zapi_msg.c
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@ -2110,6 +2110,13 @@ static void zread_route_add(ZAPI_HANDLER_ARGS)
ret = rib_add_multipath_nhe(afi, api.safi, &api.prefix, src_p,
re, &nhe);
/*
* rib_add_multipath_nhe only fails in a couple spots
* and in those spots we have not freed memory
*/
if (ret == -1)
XFREE(MTYPE_RE, re);
/* At this point, these allocations are not needed: 're' has been
* retained or freed, and if 're' still exists, it is using
* a reference to a shared group object.