X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=file_subs.c;h=e32f7ef450295e82618b4fea2271eeba6f3772e4;hb=HEAD;hp=4191b92969a9787a0ff4102b00e692b224b8b1d4;hpb=8f168ea31fb75e6dd2540c77a64224e538aa7083;p=debian%2Fpax

diff --git a/file_subs.c b/file_subs.c
index 4191b92..e32f7ef 100644
--- a/file_subs.c
+++ b/file_subs.c
@@ -382,7 +382,7 @@ node_creat(ARCHD *arcn)
 						return(-1);
 					}
 					len = readlink(nm, target,
-					    sb.st_size);
+					    sb.st_size + 1);
 					if (len == -1) {
 						syswarn(0, errno,
 						   "cannot follow symlink %s in chain for %s",
@@ -390,6 +390,14 @@ node_creat(ARCHD *arcn)
 						res = -1;
 						goto badlink;
 					}
+					if (len > sb.st_size) {
+						syswarn(0, errno,
+						   "symlink %s increased in size between lstat() and readlink() for %s",
+						    nm, arcn->name);
+
+						res = -1;
+						goto badlink;
+					}
 					target[len] = '\0';
 					nm = target;
 				}