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Subject: Prevent heap-buffer-overflow in Strnew_size()
From: Tatsuya Kinoshita <tats@debian.org>
Bug-Debian: https://github.com/tats/w3m/issues/72
Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=4381dffaa3fdf94c384f3588b5c7dff3ba1cc4ae
---
Str.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Str.c b/Str.c
index 5287c0f..7a094f5 100644
--- a/Str.c
+++ b/Str.c
@@ -48,6 +48,8 @@ Str
Strnew_size(int n)
{
Str x = GC_MALLOC(sizeof(struct _Str));
+ if (n < 0)
+ n = 0;
x->ptr = GC_MALLOC_ATOMIC(n + 1);
x->ptr[0] = '\0';
x->area_size = n + 1;
--
2.10.2
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