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Decrease buffer size when advancing past NUL byte

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Otherwise we'll overflow the buffer if space is tight. Also add a comment explaining this.

Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
David Zeuthen 2010-03-02 17:06:33 -05:00
parent da96a11b9c
commit ecd42de2c5
1 changed files with 2 additions and 0 deletions

2
libudev/libudev-device.c

@ -1166,7 +1166,9 @@ static int update_envp_monitor_buf(struct udev_device *udev_device)
l = util_strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL);
if (l == 0)
return -EINVAL;
/* advance past the trailing '\0' that util_strpcpyl() guarantees */
s++;
l--;
}
udev_device->envp[i] = NULL;
udev_device->monitor_buf_len = s - udev_device->monitor_buf;