Message-ID: <2025050147-CVE-2022-49862-04f2@gregkh>
Date: Thu,  1 May 2025 16:10:52 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-49862: tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header

This is a follow-up for commit 974cb0e3e7c9 ("tipc: fix uninit-value
in tipc_nl_compat_name_table_dump") where it should have type casted
sizeof(..) to int to work when TLV_GET_DATA_LEN() returns a negative
value.

syzbot reported a call trace because of it:

  BUG: KMSAN: uninit-value in ...
   tipc_nl_compat_name_table_dump+0x841/0xea0 net/tipc/netlink_compat.c:934
   __tipc_nl_compat_dumpit+0xab2/0x1320 net/tipc/netlink_compat.c:238
   tipc_nl_compat_dumpit+0x991/0xb50 net/tipc/netlink_compat.c:321
   tipc_nl_compat_recv+0xb6e/0x1640 net/tipc/netlink_compat.c:1324
   genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
   genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
   genl_rcv_msg+0x103f/0x1260 net/netlink/genetlink.c:792
   netlink_rcv_skb+0x3a5/0x6c0 net/netlink/af_netlink.c:2501
   genl_rcv+0x3c/0x50 net/netlink/genetlink.c:803
   netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
   netlink_unicast+0xf3b/0x1270 net/netlink/af_netlink.c:1345
   netlink_sendmsg+0x1288/0x1440 net/netlink/af_netlink.c:1921
   sock_sendmsg_nosec net/socket.c:714 [inline]
   sock_sendmsg net/socket.c:734 [inline]

The Linux kernel CVE team has assigned CVE-2022-49862 to this issue.


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

	Issue introduced in 4.9.152 with commit 4c559fb7e111077b56f62ccf833a52d8169cde19 and fixed in 4.9.334 with commit 082707d3df191bf5bb8801d43e4ce3dea39ca173
	Issue introduced in 4.14.95 with commit 2aae1723dea1235ffef183daf0694805297424f6 and fixed in 4.14.300 with commit a0ead1d648df9c456baec832b494513ef405949a
	Issue introduced in 4.19.17 with commit 2d5fc1d492d194aa2986c5a9d8a48a60e9143a72 and fixed in 4.19.267 with commit 55a253a6753a603e80b95932ca971ba514aa6ce7
	Issue introduced in 5.0 with commit 974cb0e3e7c963ced06c4e32c5b2884173fa5e01 and fixed in 5.4.225 with commit 36769b9477491a7af6635863bd950309c1e1b96c
	Issue introduced in 5.0 with commit 974cb0e3e7c963ced06c4e32c5b2884173fa5e01 and fixed in 5.10.155 with commit f31dd158580940938f77514b87337a777520185a
	Issue introduced in 5.0 with commit 974cb0e3e7c963ced06c4e32c5b2884173fa5e01 and fixed in 5.15.79 with commit 301caa06091af4d5cf056ac8249cbda4e6029c6a
	Issue introduced in 5.0 with commit 974cb0e3e7c963ced06c4e32c5b2884173fa5e01 and fixed in 6.0.9 with commit 6cee2c60bd168279852ac7dbe54c2b70d1028644
	Issue introduced in 5.0 with commit 974cb0e3e7c963ced06c4e32c5b2884173fa5e01 and fixed in 6.1 with commit 1c075b192fe41030457cd4a5f7dea730412bca40
	Issue introduced in 4.4.172 with commit c25352f9ad5dffb4de95069e67891e2aa2e99e50
	Issue introduced in 4.20.4 with commit 5486e8d46560ca2b4d86cbd7d3a66d9913b2ac65

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-2022-49862
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:
	net/tipc/netlink_compat.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/082707d3df191bf5bb8801d43e4ce3dea39ca173
	https://git.kernel.org/stable/c/a0ead1d648df9c456baec832b494513ef405949a
	https://git.kernel.org/stable/c/55a253a6753a603e80b95932ca971ba514aa6ce7
	https://git.kernel.org/stable/c/36769b9477491a7af6635863bd950309c1e1b96c
	https://git.kernel.org/stable/c/f31dd158580940938f77514b87337a777520185a
	https://git.kernel.org/stable/c/301caa06091af4d5cf056ac8249cbda4e6029c6a
	https://git.kernel.org/stable/c/6cee2c60bd168279852ac7dbe54c2b70d1028644
	https://git.kernel.org/stable/c/1c075b192fe41030457cd4a5f7dea730412bca40

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