CVE-2025-22105

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 ]---