Module Name: src
Committed By: rillig
Date: Sat Jul 3 20:54:08 UTC 2021
Modified Files:
src/usr.bin/xlint/lint1: err.c
Log Message:
lint: fix segmentation fault on malformed preprocessor output
# 0 ""
# 0 ""2
Found using afl, does not happen in practice though since every C
preprocessor generates balanced 'enter' (1) and 'leave' (2) events.
To generate a diff of this commit:
cvs rdiff -u -r1.122 -r1.123 src/usr.bin/xlint/lint1/err.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/usr.bin/xlint/lint1/err.c
diff -u src/usr.bin/xlint/lint1/err.c:1.122 src/usr.bin/xlint/lint1/err.c:1.123
--- src/usr.bin/xlint/lint1/err.c:1.122 Wed Jun 30 14:23:50 2021
+++ src/usr.bin/xlint/lint1/err.c Sat Jul 3 20:54:08 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: err.c,v 1.122 2021/06/30 14:23:50 rillig Exp $ */
+/* $NetBSD: err.c,v 1.123 2021/07/03 20:54:08 rillig Exp $ */
/*
* Copyright (c) 1994, 1995 Jochen Pohl
@@ -37,7 +37,7 @@
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: err.c,v 1.122 2021/06/30 14:23:50 rillig Exp $");
+__RCSID("$NetBSD: err.c,v 1.123 2021/07/03 20:54:08 rillig Exp $");
#endif
#include <sys/types.h>
@@ -430,8 +430,10 @@ update_location(const char *filename, in
free(top);
top = includes;
}
- top->filename = filename;
- top->lineno = lineno;
+ if (top != NULL) {
+ top->filename = filename;
+ top->lineno = lineno;
+ }
}
}
