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diff -Nrup thttpd-2.25b.orig/libhttpd.c thttpd-2.25b/libhttpd.c
--- thttpd-2.25b.orig/libhttpd.c 2003-12-25 19:06:05.000000000 +0000
+++ thttpd-2.25b/libhttpd.c 2007-01-08 21:43:28.000000000 +0000
@@ -1469,7 +1469,7 @@ expand_symlinks( char* path, char** rest
httpd_realloc_str( &checked, &maxchecked, checkedlen );
(void) strcpy( checked, path );
/* Trim trailing slashes. */
- while ( checked[checkedlen - 1] == '/' )
+ while ( checkedlen && checked[checkedlen - 1] == '/' )
{
checked[checkedlen - 1] = '\0';
--checkedlen;
@@ -1488,7 +1488,7 @@ expand_symlinks( char* path, char** rest
restlen = strlen( path );
httpd_realloc_str( &rest, &maxrest, restlen );
(void) strcpy( rest, path );
- if ( rest[restlen - 1] == '/' )
+ if ( restlen && rest[restlen - 1] == '/' )
rest[--restlen] = '\0'; /* trim trailing slash */
if ( ! tildemapped )
/* Remove any leading slashes. */
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