linux-cve-announce - CVE-2025-22105: bonding: check xdp prog when set bond mode

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Message-ID: <2025041622-CVE-2025-22105-afef@gregkh>
Date: Wed, 16 Apr 2025 16:13:16 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22105: bonding: check xdp prog when set bond mode

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

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

bonding: check xdp prog when set bond mode

Following operations can trigger a warning[1]:

    ip netns add ns1
    ip netns exec ns1 ip link add bond0 type bond mode balance-rr
    ip netns exec ns1 ip link set dev bond0 xdp obj af_xdp_kern.o sec xdp
    ip netns exec ns1 ip link set bond0 type bond mode broadcast
    ip netns del ns1

When delete the namespace, dev_xdp_uninstall() is called to remove xdp
program on bond dev, and bond_xdp_set() will check the bond mode. If bond
mode is changed after attaching xdp program, the warning may occur.

Some bond modes (broadcast, etc.) do not support native xdp. Set bond mode
with xdp program attached is not good. Add check for xdp program when set
bond mode.

    [1]
    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 11 at net/core/dev.c:9912 unregister_netdevice_many_notify+0x8d9/0x930
    Modules linked in:
    CPU: 0 UID: 0 PID: 11 Comm: kworker/u4:0 Not tainted 6.14.0-rc4 #107
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
    Workqueue: netns cleanup_net
    RIP: 0010:unregister_netdevice_many_notify+0x8d9/0x930
    Code: 00 00 48 c7 c6 6f e3 a2 82 48 c7 c7 d0 b3 96 82 e8 9c 10 3e ...
    RSP: 0018:ffffc90000063d80 EFLAGS: 00000282
    RAX: 00000000ffffffa1 RBX: ffff888004959000 RCX: 00000000ffffdfff
    RDX: 0000000000000000 RSI: 00000000ffffffea RDI: ffffc90000063b48
    RBP: ffffc90000063e28 R08: ffffffff82d39b28 R09: 0000000000009ffb
    R10: 0000000000000175 R11: ffffffff82d09b40 R12: ffff8880049598e8
    R13: 0000000000000001 R14: dead000000000100 R15: ffffc90000045000
    FS:  0000000000000000(0000) GS:ffff888007a00000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 000000000d406b60 CR3: 000000000483e000 CR4: 00000000000006f0
    Call Trace:
     <TASK>
     ? __warn+0x83/0x130
     ? unregister_netdevice_many_notify+0x8d9/0x930
     ? report_bug+0x18e/0x1a0
     ? handle_bug+0x54/0x90
     ? exc_invalid_op+0x18/0x70
     ? asm_exc_invalid_op+0x1a/0x20
     ? unregister_netdevice_many_notify+0x8d9/0x930
     ? bond_net_exit_batch_rtnl+0x5c/0x90
     cleanup_net+0x237/0x3d0
     process_one_work+0x163/0x390
     worker_thread+0x293/0x3b0
     ? __pfx_worker_thread+0x10/0x10
     kthread+0xec/0x1e0
     ? __pfx_kthread+0x10/0x10
     ? __pfx_kthread+0x10/0x10
     ret_from_fork+0x2f/0x50
     ? __pfx_kthread+0x10/0x10
     ret_from_fork_asm+0x1a/0x30
     </TASK>
    ---[ end trace 0000000000000000 ]---

The Linux kernel CVE team has assigned CVE-2025-22105 to this issue.


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

	Issue introduced in 5.15 with commit 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e and fixed in 6.14.2 with commit 0dd4fac43bdea23cfe4bb2a3eabb76d752ac32fb
	Issue introduced in 5.15 with commit 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e and fixed in 6.15-rc1 with commit 094ee6017ea09c11d6af187935a949df32803ce0

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-2025-22105
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/net/bonding/bond_main.c
	drivers/net/bonding/bond_options.c
	include/net/bonding.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/0dd4fac43bdea23cfe4bb2a3eabb76d752ac32fb
	https://git.kernel.org/stable/c/094ee6017ea09c11d6af187935a949df32803ce0