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From 0c762f107e6a5f6c56c42c0aba48f6aa9c6f1eef Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Thu, 25 Oct 2018 12:24:30 +0200
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Subject: [PATCH] ip-route: Fix for memleak in error path
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1602555
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Upstream Status: iproute2.git commit e5da392ff8e39
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commit e5da392ff8e3979b86cad04b238ffbbc8076e005
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Author: Phil Sutter <phil@nwl.cc>
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Date: Thu Oct 18 14:30:31 2018 +0200
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ip-route: Fix for memleak in error path
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If call to rta_addattr_l() failed, parse_encap_seg6() would leak memory.
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Fix this by making sure calls to free() are not skipped.
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Fixes: bd59e5b1517b0 ("ip-route: Fix segfault with many nexthops")
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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---
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ip/iproute_lwtunnel.c | 16 ++++++++++------
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1 file changed, 10 insertions(+), 6 deletions(-)
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diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
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index 969a476..85045d4 100644
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--- a/ip/iproute_lwtunnel.c
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+++ b/ip/iproute_lwtunnel.c
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@@ -498,6 +498,7 @@ static int parse_encap_seg6(struct rtattr *rta, size_t len, int *argcp,
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int argc = *argcp;
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int encap = -1;
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__u32 hmac = 0;
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+ int ret = 0;
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int srhlen;
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while (argc > 0) {
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@@ -539,16 +540,19 @@ static int parse_encap_seg6(struct rtattr *rta, size_t len, int *argcp,
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memcpy(tuninfo->srh, srh, srhlen);
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if (rta_addattr_l(rta, len, SEG6_IPTUNNEL_SRH, tuninfo,
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- sizeof(*tuninfo) + srhlen))
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- return -1;
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-
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- free(tuninfo);
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- free(srh);
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+ sizeof(*tuninfo) + srhlen)) {
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+ ret = -1;
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+ goto out;
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+ }
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*argcp = argc + 1;
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*argvp = argv - 1;
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- return 0;
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+out:
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+ free(tuninfo);
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+ free(srh);
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+
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+ return ret;
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}
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struct lwt_x {
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--
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1.8.3.1
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