linux-cve-announce - CVE-2025-38022: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register

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Message-ID: <2025061846-CVE-2025-38022-41b3@gregkh>
Date: Wed, 18 Jun 2025 11:28:56 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38022: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem

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

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

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

RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem

Call Trace:

 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xc3/0x670 mm/kasan/report.c:521
 kasan_report+0xe0/0x110 mm/kasan/report.c:634
 strlen+0x93/0xa0 lib/string.c:420
 __fortify_strlen include/linux/fortify-string.h:268 [inline]
 get_kobj_path_length lib/kobject.c:118 [inline]
 kobject_get_path+0x3f/0x2a0 lib/kobject.c:158
 kobject_uevent_env+0x289/0x1870 lib/kobject_uevent.c:545
 ib_register_device drivers/infiniband/core/device.c:1472 [inline]
 ib_register_device+0x8cf/0xe00 drivers/infiniband/core/device.c:1393
 rxe_register_device+0x275/0x320 drivers/infiniband/sw/rxe/rxe_verbs.c:1552
 rxe_net_add+0x8e/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:550
 rxe_newlink+0x70/0x190 drivers/infiniband/sw/rxe/rxe.c:225
 nldev_newlink+0x3a3/0x680 drivers/infiniband/core/nldev.c:1796
 rdma_nl_rcv_msg+0x387/0x6e0 drivers/infiniband/core/netlink.c:195
 rdma_nl_rcv_skb.constprop.0.isra.0+0x2e5/0x450
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620
 __sys_sendmsg+0x16d/0x220 net/socket.c:2652
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

This problem is similar to the problem that the
commit 1d6a9e7449e2 ("RDMA/core: Fix use-after-free when rename device name")
fixes.

The root cause is: the function ib_device_rename() renames the name with
lock. But in the function kobject_uevent(), this name is accessed without
lock protection at the same time.

The solution is to add the lock protection when this name is accessed in
the function kobject_uevent().

The Linux kernel CVE team has assigned CVE-2025-38022 to this issue.


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

	Issue introduced in 5.11 with commit 779e0bf47632c609c59f527f9711ecd3214dccb0 and fixed in 6.12.30 with commit 10c7f1c647da3b77ef8827d974a97b6530b64df0
	Issue introduced in 5.11 with commit 779e0bf47632c609c59f527f9711ecd3214dccb0 and fixed in 6.14.8 with commit 03df57ad4b0ff9c5a93ff981aba0b42578ad1571
	Issue introduced in 5.11 with commit 779e0bf47632c609c59f527f9711ecd3214dccb0 and fixed in 6.15 with commit d0706bfd3ee40923c001c6827b786a309e2a8713
	Issue introduced in 5.4.86 with commit 9b54e31fd08f8d8db507d021c88e760d5f8e4640
	Issue introduced in 5.10.4 with commit 53e9a5a692f839780084ad81dbd461ec917f74f7

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-2025-38022
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


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/10c7f1c647da3b77ef8827d974a97b6530b64df0
	https://git.kernel.org/stable/c/03df57ad4b0ff9c5a93ff981aba0b42578ad1571
	https://git.kernel.org/stable/c/d0706bfd3ee40923c001c6827b786a309e2a8713