linux-cve-announce - CVE-2022-49925: RDMA/core: Fix null-ptr-deref in ib_core

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Message-ID: <2025050110-CVE-2022-49925-2485@gregkh>
Date: Thu,  1 May 2025 16:11:55 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-49925: RDMA/core: Fix null-ptr-deref in ib_core_cleanup()

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

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

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

RDMA/core: Fix null-ptr-deref in ib_core_cleanup()

KASAN reported a null-ptr-deref error:

  KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f]
  CPU: 1 PID: 379
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
  RIP: 0010:destroy_workqueue+0x2f/0x740
  RSP: 0018:ffff888016137df8 EFLAGS: 00000202
  ...
  Call Trace:
   ib_core_cleanup+0xa/0xa1 [ib_core]
   __do_sys_delete_module.constprop.0+0x34f/0x5b0
   do_syscall_64+0x3a/0x90
   entry_SYSCALL_64_after_hwframe+0x63/0xcd
  RIP: 0033:0x7fa1a0d221b7
  ...

It is because the fail of roce_gid_mgmt_init() is ignored:

 ib_core_init()
   roce_gid_mgmt_init()
     gid_cache_wq = alloc_ordered_workqueue # fail
 ...
 ib_core_cleanup()
   roce_gid_mgmt_cleanup()
     destroy_workqueue(gid_cache_wq)
     # destroy an unallocated wq

Fix this by catching the fail of roce_gid_mgmt_init() in ib_core_init().

The Linux kernel CVE team has assigned CVE-2022-49925 to this issue.


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

	Issue introduced in 4.3 with commit 03db3a2d81e6e84f3ed3cb9e087cae17d762642b and fixed in 5.4.224 with commit af8fb5a0600e9ae29950e9422a032c3c22649ee5
	Issue introduced in 4.3 with commit 03db3a2d81e6e84f3ed3cb9e087cae17d762642b and fixed in 5.10.154 with commit d360e875c011a005628525bf290322058927e7dc
	Issue introduced in 4.3 with commit 03db3a2d81e6e84f3ed3cb9e087cae17d762642b and fixed in 5.15.78 with commit 6b3d5dcb12347f3518308c2c9d2cf72453a3e1e5
	Issue introduced in 4.3 with commit 03db3a2d81e6e84f3ed3cb9e087cae17d762642b and fixed in 6.0.8 with commit ab817f75e5e0fa58d9be0825da6a7b7d8a1fa1d9
	Issue introduced in 4.3 with commit 03db3a2d81e6e84f3ed3cb9e087cae17d762642b and fixed in 6.1 with commit 07c0d131cc0fe1f3981a42958fc52d573d303d89

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-2022-49925
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/core/device.c
	drivers/infiniband/core/nldev.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/af8fb5a0600e9ae29950e9422a032c3c22649ee5
	https://git.kernel.org/stable/c/d360e875c011a005628525bf290322058927e7dc
	https://git.kernel.org/stable/c/6b3d5dcb12347f3518308c2c9d2cf72453a3e1e5
	https://git.kernel.org/stable/c/ab817f75e5e0fa58d9be0825da6a7b7d8a1fa1d9
	https://git.kernel.org/stable/c/07c0d131cc0fe1f3981a42958fc52d573d303d89