linux-cve-announce - CVE-2024-53091: bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx

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Message-ID: <2024112151-CVE-2024-53091-7f61@gregkh>
Date: Thu, 21 Nov 2024 19:16:52 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53091: bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx

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

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

bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx

As the introduction of the support for vsock and unix sockets in sockmap,
tls_sw_has_ctx_tx/rx cannot presume the socket passed in must be IS_ICSK.
vsock and af_unix sockets have vsock_sock and unix_sock instead of
inet_connection_sock. For these sockets, tls_get_ctx may return an invalid
pointer and cause page fault in function tls_sw_ctx_rx.

BUG: unable to handle page fault for address: 0000000000040030
Workqueue: vsock-loopback vsock_loopback_work
RIP: 0010:sk_psock_strp_data_ready+0x23/0x60
Call Trace:
 ? __die+0x81/0xc3
 ? no_context+0x194/0x350
 ? do_page_fault+0x30/0x110
 ? async_page_fault+0x3e/0x50
 ? sk_psock_strp_data_ready+0x23/0x60
 virtio_transport_recv_pkt+0x750/0x800
 ? update_load_avg+0x7e/0x620
 vsock_loopback_work+0xd0/0x100
 process_one_work+0x1a7/0x360
 worker_thread+0x30/0x390
 ? create_worker+0x1a0/0x1a0
 kthread+0x112/0x130
 ? __kthread_cancel_work+0x40/0x40
 ret_from_fork+0x1f/0x40

v2:
  - Add IS_ICSK check
v3:
  - Update the commits in Fixes

The Linux kernel CVE team has assigned CVE-2024-53091 to this issue.


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

	Issue introduced in 5.15 with commit 94531cfcbe79 and fixed in 6.6.62 with commit a078a480ff3f
	Issue introduced in 5.15 with commit 94531cfcbe79 and fixed in 6.11.9 with commit 6781cfa93a6a
	Issue introduced in 5.15 with commit 94531cfcbe79 and fixed in 6.12 with commit 44d0469f79bd

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-2024-53091
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:
	include/net/tls.h


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/a078a480ff3f43d74d8a024ae10c3c7daf6db149
	https://git.kernel.org/stable/c/6781cfa93a6a1b7f5be6819a5a2dd8f30f47ca26
	https://git.kernel.org/stable/c/44d0469f79bd3d0b3433732877358df7dc6b17b1