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Paulo Alcantara e66dcf7bb9 smb: client: fix potential UAF and double free in smb2_open_file()
[ Upstream commit ebbbc4bfad ]

Zero out @err_iov and @err_buftype before retrying SMB2_open() to
prevent an UAF bug if @data != NULL, otherwise a double free.

Fixes: e3a4363302 ("smb/client: fix memory leak in smb2_open_file()")
Reported-by: David Howells <dhowells@redhat.com>
Closes: https://lore.kernel.org/r/2892312.1770306653@warthog.procyon.org.uk
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-02-26 14:58:59 -08:00
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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 reStructuredText 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.