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47 lines
1.4 KiB
47 lines
1.4 KiB
From ff403602edc917b8bef2062dc0d5dec2017e3232 Mon Sep 17 00:00:00 2001
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From: Willy Tarreau <w@1wt.eu>
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Date: Fri, 21 Oct 2016 17:14:35 +0200
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Subject: [PATCH 08/26] BUG/MINOR: vars: make smp_fetch_var() more robust
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against misuses
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smp_fetch_var() may be called from everywhere since it just reads a
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variable. It must ensure that the stream exists before trying to return
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a stream-dependant variable. For now there is no impact but it will
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cause trouble with tcp-request session rules.
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(cherry picked from commit 7513d001c8a6b7d1cf8e7d5469942cd39d6e8160)
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---
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src/vars.c | 16 +++++++++++++---
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1 file changed, 13 insertions(+), 3 deletions(-)
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diff --git a/src/vars.c b/src/vars.c
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index b22c3bf..4a0c4ed 100644
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--- a/src/vars.c
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+++ b/src/vars.c
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@@ -242,11 +242,21 @@ static int smp_fetch_var(const struct arg *args, struct sample *smp, const char
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/* Check the availibity of the variable. */
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switch (var_desc->scope) {
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- case SCOPE_SESS: vars = &smp->sess->vars; break;
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- case SCOPE_TXN: vars = &smp->strm->vars_txn; break;
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+ case SCOPE_SESS:
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+ vars = &smp->sess->vars;
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+ break;
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+ case SCOPE_TXN:
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+ if (!smp->strm)
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+ return 0;
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+ vars = &smp->strm->vars_txn;
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+ break;
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case SCOPE_REQ:
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case SCOPE_RES:
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- default: vars = &smp->strm->vars_reqres; break;
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+ default:
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+ if (!smp->strm)
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+ return 0;
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+ vars = &smp->strm->vars_reqres;
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+ break;
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}
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if (vars->scope != var_desc->scope)
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return 0;
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--
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2.7.3
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