Enforce reasonable upper and low bounds on the size of tar headers

Since they are read directly into memory, blindly allocating the size
from the tar ball is probably a bad idea.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/tar/internal.h b/lib/tar/internal.h
index 6ac8d99..d59be14 100644
--- a/lib/tar/internal.h
+++ b/lib/tar/internal.h
@@ -32,6 +32,12 @@ enum {
 	ETV_POSIX,
 };
 
+
+#define TAR_MAX_SYMLINK_LEN (65536)
+#define TAR_MAX_PATH_LEN (65536)
+#define TAR_MAX_PAX_LEN (65536)
+
+
 int read_octal(const char *str, int digits, uint64_t *out);
 
 int read_binary(const char *str, int digits, uint64_t *out);