mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
36 lines
1.4 KiB
Diff
36 lines
1.4 KiB
Diff
|
From e710c34469af4378c2db6fa0b0be88313adcb68f Mon Sep 17 00:00:00 2001
|
||
|
|
From: Alin Nastac <alin.nastac@gmail.com>
|
||
|
|
Date: Mon, 30 Sep 2019 15:30:26 +0100
|
||
|
|
Subject: [PATCH] Fix crash when negative SRV response over TCP gets stored in
|
||
|
|
LRU cache entry.
|
||
|
|
|
||
|
|
Patch extended to receive side of pipe by SRK.
|
||
|
|
---
|
||
|
|
src/cache.c | 8 ++++++--
|
||
|
|
1 file changed, 6 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
--- a/src/cache.c
|
||
|
|
+++ b/src/cache.c
|
||
|
|
@@ -665,7 +665,11 @@ void cache_end_insert(void)
|
||
|
|
if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS | F_SRV))
|
||
|
|
read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr, sizeof(new_chain->addr), 0);
|
||
|
|
if (flags & F_SRV)
|
||
|
|
- blockdata_write(new_chain->addr.srv.target, new_chain->addr.srv.targetlen, daemon->pipe_to_parent);
|
||
|
|
+ {
|
||
|
|
+ /* A negative SRV entry is possible and has no data, obviously. */
|
||
|
|
+ if (!(flags & F_NEG))
|
||
|
|
+ blockdata_write(new_chain->addr.srv.target, new_chain->addr.srv.targetlen, daemon->pipe_to_parent);
|
||
|
|
+ }
|
||
|
|
#ifdef HAVE_DNSSEC
|
||
|
|
if (flags & F_DNSKEY)
|
||
|
|
{
|
||
|
|
@@ -737,7 +741,7 @@ int cache_recv_insert(time_t now, int fd
|
||
|
|
if (!read_write(fd, (unsigned char *)&addr, sizeof(addr), 1))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
- if (flags & F_SRV && !(addr.srv.target = blockdata_read(fd, addr.srv.targetlen)))
|
||
|
|
+ if ((flags & F_SRV) && !(flags & F_NEG) && !(addr.srv.target = blockdata_read(fd, addr.srv.targetlen)))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
#ifdef HAVE_DNSSEC
|