| 123456789101112131415161718192021222324252627282930313233 |
- Gentoo Bug: https://bugs.gentoo.org/898176
- Upstream Commit Link: https://git.savannah.gnu.org/cgit/tar.git/commit/?id=3da78400eafcccb97e2f2fd4b227ea40d794ede8
- From 3da78400eafcccb97e2f2fd4b227ea40d794ede8 Mon Sep 17 00:00:00 2001
- From: Sergey Poznyakoff <gray@gnu.org>
- Date: Sat, 11 Feb 2023 11:57:39 +0200
- Subject: [PATCH] Fix boundary checking in base-256 decoder
- * src/list.c (from_header): Base-256 encoding is at least 2 bytes
- long.
- ---
- src/list.c | 5 +++--
- 1 file changed, 3 insertions(+), 2 deletions(-)
- diff --git a/src/list.c b/src/list.c
- index 9fafc425..86bcfdd1 100644
- --- a/src/list.c
- +++ b/src/list.c
- @@ -881,8 +881,9 @@ from_header (char const *where0, size_t digs, char const *type,
- where++;
- }
- }
- - else if (*where == '\200' /* positive base-256 */
- - || *where == '\377' /* negative base-256 */)
- + else if (where <= lim - 2
- + && (*where == '\200' /* positive base-256 */
- + || *where == '\377' /* negative base-256 */))
- {
- /* Parse base-256 output. A nonnegative number N is
- represented as (256**DIGS)/2 + N; a negative number -N is
- --
- 2.39.2.637.g21b0678d19-goog
|
