Subject: CVE-2023-52513: RDMA/siw: Fix connection failure handling

From: Greg Kroah-Hartman <[email-masked]>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

RDMA/siw: Fix connection failure handling

In case immediate MPA request processing fails, the newly
created endpoint unlinks the listening endpoint and is
ready to be dropped. This special case was not handled
correctly by the code handling the later TCP socket close,
causing a NULL dereference crash in siw_cm_work_handler()
when dereferencing a NULL listener. We now also cancel
the useless MPA timeout, if immediate MPA request
processing fails.

This patch furthermore simplifies MPA processing in general:
Scheduling a useless TCP socket read in sk_data_ready() upcall
is now surpressed, if the socket is already moved out of
TCP_ESTABLISHED state.

The Linux kernel CVE team has assigned CVE-2023-52513 to this issue.

Affected and fixed versions
===========================

	Issue introduced in 5.3 with commit 6c52fdc244b5 and fixed in 5.4.258 with commit 6e26812e289b
	Issue introduced in 5.3 with commit 6c52fdc244b5 and fixed in 5.10.198 with commit 0d520cdb0cd0
	Issue introduced in 5.3 with commit 6c52fdc244b5 and fixed in 5.15.135 with commit 81b7bf367eea
	Issue introduced in 5.3 with commit 6c52fdc244b5 and fixed in 6.1.57 with commit 5cf38e638e5d
	Issue introduced in 5.3 with commit 6c52fdc244b5 and fixed in 6.5.7 with commit eeafc50a77f6
	Issue introduced in 5.3 with commit 6c52fdc244b5 and fixed in 6.6 with commit 53a3f7770497

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2023-52513
will be updated if fixes are backported, please check that for the most
up to date information about this issue.

Affected files
==============

The file(s) affected by this issue are:
	drivers/infiniband/sw/siw/siw_cm.c

Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/6e26812e289b374c17677d238164a5a8f5770594
	https://git.kernel.org/stable/c/0d520cdb0cd095eac5d00078dfd318408c9b5eed
	https://git.kernel.org/stable/c/81b7bf367eea795d259d0261710c6a89f548844d
	https://git.kernel.org/stable/c/5cf38e638e5d01b68f9133968a85e8b3fd1ecf2f
	https://git.kernel.org/stable/c/eeafc50a77f6a783c2c44e7ec3674a7b693e06f8
	https://git.kernel.org/stable/c/53a3f777049771496f791504e7dc8ef017cba590