From: Utkal Singh <singhutkal015@gmail.com>
To: linux-erofs@lists.ozlabs.org
Cc: xiang@kernel.org, yifan.yfzhao@foxmail.com,
Utkal Singh <singhutkal015@gmail.com>
Subject: [PATCH v2 0/2] erofs-utils: lib/tar: fix PAX header parsing issues
Date: Mon, 16 Mar 2026 06:51:17 +0000 [thread overview]
Message-ID: <20260316065119.21726-1-singhutkal015@gmail.com> (raw)
These two patches fix input validation bugs in the PAX extended
header parser in lib/tar.c that can trigger crashes on malformed
or crafted tar archives.
Patch 1 skips PAX entries with empty path= value to avoid
out-of-bounds access on zero-length strings.
Patch 2 rejects negative size= values to prevent heap corruption
from incorrect allocation sizes in subsequent operations.
Changes in v2:
- Fix mixed indentation in patch 2/2 (use tabs, not spaces)
Utkal Singh (2):
erofs-utils: lib/tar: skip PAX entries with empty path
erofs-utils: lib/tar: reject negative size= value in PAX header
lib/tar.c | 7 +++++++
1 file changed, 7 insertions(+)
--
2.43.0
next reply other threads:[~2026-03-16 6:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-16 6:51 Utkal Singh [this message]
2026-03-16 6:51 ` [PATCH v2 1/2] erofs-utils: lib/tar: skip PAX entries with empty path Utkal Singh
2026-03-16 6:51 ` [PATCH v2 2/2] erofs-utils: lib/tar: reject negative size= value in PAX header Utkal Singh
2026-03-16 7:35 ` [PATCH v2 0/2] erofs-utils: lib/tar: fix PAX header parsing issues Gao Xiang
2026-03-16 7:48 ` Utkal Singh
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