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52 lines
1.7 KiB
52 lines
1.7 KiB
From 294c8d2f81847e0e2d26aa0700564ac2f6aaffa6 Mon Sep 17 00:00:00 2001
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From: Thierry Fournier <thierry.fournier@ozon.io>
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Date: Mon, 6 Jun 2016 18:28:05 +0200
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Subject: [PATCH 3/4] BUG/MEDIUM: sticktables: segfault in some configuration
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error cases
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When a stick table is tracked, and another one is used later on the
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configuration, a segfault occurs.
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The function "smp_create_src_stkctr" can return a NULL value, and
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its value is not tested, so one other function try to dereference
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a NULL pointer. This patch just add a verification of the NULL
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pointer.
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The problem is reproduced with this configuration:
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listen www
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mode http
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bind :12345
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tcp-request content track-sc0 src table IPv4
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http-request allow if { sc0_inc_gpc0(IPv6) gt 0 }
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server dummy 127.0.0.1:80
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backend IPv4
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stick-table type ip size 10 expire 60s store gpc0
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backend IPv6
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stick-table type ipv6 size 10 expire 60s store gpc0
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Thank to kabefuna@gmail.com for the bug report.
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This patch must be backported in the 1.6 and 1.5 version.
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(cherry picked from commit 6fc340ff07171bb85d11d835fa4158bbdef240a0)
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(cherry picked from commit 4693e2302271252044038c9be38487fb16218e5b)
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---
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src/session.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/session.c b/src/session.c
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index 4e84803..fbd5094 100644
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--- a/src/session.c
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+++ b/src/session.c
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@@ -2908,7 +2908,7 @@ smp_fetch_sc_inc_gpc0(struct proxy *px, struct session *l4, void *l7, unsigned i
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smp->flags = SMP_F_VOL_TEST;
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smp->type = SMP_T_UINT;
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smp->data.uint = 0;
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- if (stkctr_entry(stkctr) != NULL) {
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+ if (stkctr && stkctr_entry(stkctr)) {
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void *ptr;
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/* First, update gpc0_rate if it's tracked. Second, update its
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--
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2.7.3
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