From: Gao Xiang <hsiangkao@linux.alibaba.com>
To: Utkal Singh <singhutkal015@gmail.com>, linux-erofs@lists.ozlabs.org
Cc: xiang@kernel.org, yifan.yfzhao@foxmail.com
Subject: Re: [PATCH v2 0/2] erofs-utils: lib/tar: fix PAX header parsing issues
Date: Mon, 16 Mar 2026 15:35:07 +0800 [thread overview]
Message-ID: <7de7aecd-1ffe-4879-b251-fa201b836655@linux.alibaba.com> (raw)
In-Reply-To: <20260316065119.21726-1-singhutkal015@gmail.com>
On 2026/3/16 14:51, Utkal Singh wrote:
> 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.
Do you have any testcases or reproduciable tar? You can list them
in the compressed-base64 format in the commit message.
next prev parent reply other threads:[~2026-03-16 7:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-16 6:51 [PATCH v2 0/2] erofs-utils: lib/tar: fix PAX header parsing issues Utkal Singh
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 ` Gao Xiang [this message]
2026-03-16 7:48 ` [PATCH v2 0/2] erofs-utils: lib/tar: fix PAX header parsing issues Utkal Singh
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