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Chun-Yi Lee 07b418d50c aoe: fix the potential use-after-free problem in more places commit `6d6e54fc71` upstream. For fixing CVE-2023-6270, `f98364e926` ("aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts") makes tx() calling dev_put() instead of doing in aoecmd_cfg_pkts(). It avoids that the tx() runs into use-after-free. Then Nicolai Stange found more places in aoe have potential use-after-free problem with tx(). e.g. revalidate(), aoecmd_ata_rw(), resend(), probe() and aoecmd_cfg_rsp(). Those functions also use aoenet_xmit() to push packet to tx queue. So they should also use dev_hold() to increase the refcnt of skb->dev. On the other hand, moving dev_put() to tx() causes that the refcnt of skb->dev be reduced to a negative value, because corresponding dev_hold() are not called in revalidate(), aoecmd_ata_rw(), resend(), probe(), and aoecmd_cfg_rsp(). This patch fixed this issue. Cc: stable@vger.kernel.org Link: https://nvd.nist.gov/vuln/detail/CVE-2023-6270 Fixes: `f98364e926` ("aoe: fix the potential use-after-free problem in aoecmd_cfg_pkts") Reported-by: Nicolai Stange <nstange@suse.com> Signed-off-by: Chun-Yi Lee <jlee@suse.com> Link: https://lore.kernel.org/stable/20240624064418.27043-1-jlee%40suse.com Link: https://lore.kernel.org/r/20241002035458.24401-1-jlee@suse.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2024-10-17 15:11:39 +02:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.