tar: fix 256-bit encoded number decoding

Signed-off-by: Etienne Le Sueur <elesueur@vmware.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/archival/libarchive/get_header_tar.c b/archival/libarchive/get_header_tar.c
index 80a7091..b168653 100644 (file)
--- a/archival/libarchive/get_header_tar.c
+++ b/archival/libarchive/get_header_tar.c
@@ -84,7 +84,7 @@ static unsigned long long getOctal(char *str, int len)
                first >>= 1; /* now 7th bit = 6th bit */
                v = first;   /* sign-extend 8 bits to 64 */
                while (--len != 0)
-                       v = (v << 8) + (unsigned char) *str++;
+                       v = (v << 8) + (uint8_t) *++str;
        }
        return v;
 }