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fix rejection of dns responses with pointers past 512 byte offset
[musl]
/
src
/
network
/
res_mkquery.c
diff --git
a/src/network/res_mkquery.c
b/src/network/res_mkquery.c
index
33f50cb
..
614bf78
100644
(file)
--- a/
src/network/res_mkquery.c
+++ b/
src/network/res_mkquery.c
@@
-13,6
+13,7
@@
int __res_mkquery(int op, const char *dname, int class, int type,
int n;
if (l && dname[l-1]=='.') l--;
+ if (l && dname[l-1]=='.') return -1;
n = 17+l+!!l;
if (l>253 || buflen<n || op>15u || class>255u || type>255u)
return -1;