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Jeff Layton
a112b91dd6
[ Upstream commit6b3b697d65] svc_tcp_sendmsg() calls xdr_buf_to_bvec() with the second slot of rq_bvec as the start, but doesn't reduce the array length by one, which could lead to an array overrun. Also, rq_bvec is always rq_maxpages in length, which can be too short in some cases, since the TCP record marker consumes a slot. Fix both problems by adding a separate bvec array to the svc_sock that is specifically for sending. For TCP, make this array one slot longer than rq_maxpages, to account for the record marker. For UDP, only allocate as large an array as we need since it's limited to 64k of payload. Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: NeilBrown <neil@brown.name> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Stable-dep-of:18c1cc6988("SUNRPC: Return an error from xdr_buf_to_bvec() on overflow") Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.