If PATH_MAX on your system is smaller than a path stored in the git repo,
it may cause the buffer overflow in prepare_attr_stack.
Signed-off-by: Dmitry Potapov <dpotapov@xxxxxxxxx>
---
On Wed, Jul 16, 2008 at 05:21:27PM +0200, Johannes Sixt wrote:
> Dmitry Potapov schrieb:
> > + pathbuf.len = 0;
>
> + strbuf_reset(&pathbuf);
>
> -- Hannes
attr.c | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/attr.c b/attr.c
index 0fb47d3..17f6a4d 100644
--- a/attr.c
+++ b/attr.c
@@ -459,7 +459,9 @@ static void prepare_attr_stack(const char *path, int dirlen)
{
struct attr_stack *elem, *info;
int len;
- char pathbuf[PATH_MAX];
+ struct strbuf pathbuf;
+
+ strbuf_init(&pathbuf, dirlen+2+strlen(GITATTRIBUTES_FILE));
/*
* At the bottom of the attribute stack is the built-in
@@ -510,13 +512,14 @@ static void prepare_attr_stack(const char *path, int dirlen)
len = strlen(attr_stack->origin);
if (dirlen <= len)
break;
- memcpy(pathbuf, path, dirlen);
- memcpy(pathbuf + dirlen, "/", 2);
- cp = strchr(pathbuf + len + 1, '/');
+ strbuf_reset(&pathbuf);
+ strbuf_add(&pathbuf, path, dirlen);
+ strbuf_addch(&pathbuf, '/');
+ cp = strchr(pathbuf.buf + len + 1, '/');
strcpy(cp + 1, GITATTRIBUTES_FILE);
- elem = read_attr(pathbuf, 0);
+ elem = read_attr(pathbuf.buf, 0);
*cp = '\0';
- elem->origin = strdup(pathbuf);
+ elem->origin = strdup(pathbuf.buf);
elem->prev = attr_stack;
attr_stack = elem;
debug_push(elem);
--
1.5.6.3.3.geccd
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