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util_resolve_sys_link(): fix possible buffer overflow

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This commit is contained in:
Florian Zumbiehl 2009-09-01 12:38:16 +02:00 committed by Kay Sievers
parent 9257ecfc19
commit 32ecabb15d
1 changed files with 2 additions and 2 deletions
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4
libudev/libudev-util.c
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@ -56,13 +56,13 @@ int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size)
{
char link_target[UTIL_PATH_SIZE];
int len;
ssize_t len;
int i;
int back;
char *base;
len = readlink(syspath, link_target, sizeof(link_target));
if (len <= 0)
if (len <= 0 || len == (ssize_t)sizeof(link_target))
return -1;
link_target[len] = '\0';
dbg(udev, "path link '%s' points to '%s'\n", syspath, link_target);