From 9ded36e8ac1c3f66ecc736399f4ac88381a5ea64 Mon Sep 17 00:00:00 2001 From: acoul Date: Thu, 18 Nov 2010 14:58:37 +0000 Subject: toolchain/uClibc: push some upstream patches for uClibc-0.9.31. should resolve isses of #8269 git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24029 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- ...fix_usage_of_uninitialized_DNS_parameters.patch | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 toolchain/uClibc/patches-0.9.31/000-upstream-fix_usage_of_uninitialized_DNS_parameters.patch (limited to 'toolchain/uClibc/patches-0.9.31/000-upstream-fix_usage_of_uninitialized_DNS_parameters.patch') diff --git a/toolchain/uClibc/patches-0.9.31/000-upstream-fix_usage_of_uninitialized_DNS_parameters.patch b/toolchain/uClibc/patches-0.9.31/000-upstream-fix_usage_of_uninitialized_DNS_parameters.patch new file mode 100644 index 000000000..c33614afd --- /dev/null +++ b/toolchain/uClibc/patches-0.9.31/000-upstream-fix_usage_of_uninitialized_DNS_parameters.patch @@ -0,0 +1,40 @@ +From c602079e5b7ba998d1dd6cae4a305af80e6cba52 Mon Sep 17 00:00:00 2001 +From: Gabor Juhos +Date: Tue, 23 Mar 2010 08:35:27 +0100 +Subject: [PATCH] Fix use-after-free bug in __dns_lookup. + +If the type of the first answer does not match with the requested type, +then the dotted name will be freed. If there are no further answers in +the DNS reply, this pointer will be used later on in the same function. +Additionally it is passed to the caller, and may cause strange behaviour. + +For example, the following busybox commands are triggering a segmentation +fault with uClibc 0.9.30.x + + - nslookup ipv6.google.com + - ping ipv6.google.com + - wget http//ipv6.google.com/ + +Signed-off-by: Gabor Juhos + +--- + +See https://dev.openwrt.org/ticket/6886 for a testcase +--- + libc/inet/resolv.c | 4 +--- + 1 files changed, 1 insertions(+), 3 deletions(-) + +--- a/libc/inet/resolv.c ++++ b/libc/inet/resolv.c +@@ -1517,10 +1517,8 @@ int attribute_hidden __dns_lookup(const + memcpy(a, &ma, sizeof(ma)); + if (a->atype != T_SIG && (NULL == a->buf || (type != T_A && type != T_AAAA))) + break; +- if (a->atype != type) { +- free(a->dotted); ++ if (a->atype != type) + continue; +- } + a->add_count = h.ancount - j - 1; + if ((a->rdlength + sizeof(struct in_addr*)) * a->add_count > a->buflen) + break; -- cgit v1.2.3