| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-22075: rtnetlink: Allocate vfinfo size for VF GUIDs when supported |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| rtnetlink: Allocate vfinfo size for VF GUIDs when supported |
| |
| Commit 30aad41721e0 ("net/core: Add support for getting VF GUIDs") |
| added support for getting VF port and node GUIDs in netlink ifinfo |
| messages, but their size was not taken into consideration in the |
| function that allocates the netlink message, causing the following |
| warning when a netlink message is filled with many VF port and node |
| GUIDs: |
| # echo 64 > /sys/bus/pci/devices/0000\:08\:00.0/sriov_numvfs |
| # ip link show dev ib0 |
| RTNETLINK answers: Message too long |
| Cannot send link get request: Message too long |
| |
| Kernel warning: |
| |
| ------------[ cut here ]------------ |
| WARNING: CPU: 2 PID: 1930 at net/core/rtnetlink.c:4151 rtnl_getlink+0x586/0x5a0 |
| Modules linked in: xt_conntrack xt_MASQUERADE nfnetlink xt_addrtype iptable_nat nf_nat br_netfilter overlay mlx5_ib macsec mlx5_core tls rpcrdma rdma_ucm ib_uverbs ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm iw_cm ib_ipoib fuse ib_cm ib_core |
| CPU: 2 UID: 0 PID: 1930 Comm: ip Not tainted 6.14.0-rc2+ #1 |
| Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 |
| RIP: 0010:rtnl_getlink+0x586/0x5a0 |
| Code: cb 82 e8 3d af 0a 00 4d 85 ff 0f 84 08 ff ff ff 4c 89 ff 41 be ea ff ff ff e8 66 63 5b ff 49 c7 07 80 4f cb 82 e9 36 fc ff ff <0f> 0b e9 16 fe ff ff e8 de a0 56 00 66 66 2e 0f 1f 84 00 00 00 00 |
| RSP: 0018:ffff888113557348 EFLAGS: 00010246 |
| RAX: 00000000ffffffa6 RBX: ffff88817e87aa34 RCX: dffffc0000000000 |
| RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff88817e87afb8 |
| RBP: 0000000000000009 R08: ffffffff821f44aa R09: 0000000000000000 |
| R10: ffff8881260f79a8 R11: ffff88817e87af00 R12: ffff88817e87aa00 |
| R13: ffffffff8563d300 R14: 00000000ffffffa6 R15: 00000000ffffffff |
| FS: 00007f63a5dbf280(0000) GS:ffff88881ee00000(0000) knlGS:0000000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 00007f63a5ba4493 CR3: 00000001700fe002 CR4: 0000000000772eb0 |
| DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 |
| PKRU: 55555554 |
| Call Trace: |
| <TASK> |
| ? __warn+0xa5/0x230 |
| ? rtnl_getlink+0x586/0x5a0 |
| ? report_bug+0x22d/0x240 |
| ? handle_bug+0x53/0xa0 |
| ? exc_invalid_op+0x14/0x50 |
| ? asm_exc_invalid_op+0x16/0x20 |
| ? skb_trim+0x6a/0x80 |
| ? rtnl_getlink+0x586/0x5a0 |
| ? __pfx_rtnl_getlink+0x10/0x10 |
| ? rtnetlink_rcv_msg+0x1e5/0x860 |
| ? __pfx___mutex_lock+0x10/0x10 |
| ? rcu_is_watching+0x34/0x60 |
| ? __pfx_lock_acquire+0x10/0x10 |
| ? stack_trace_save+0x90/0xd0 |
| ? filter_irq_stacks+0x1d/0x70 |
| ? kasan_save_stack+0x30/0x40 |
| ? kasan_save_stack+0x20/0x40 |
| ? kasan_save_track+0x10/0x30 |
| rtnetlink_rcv_msg+0x21c/0x860 |
| ? entry_SYSCALL_64_after_hwframe+0x76/0x7e |
| ? __pfx_rtnetlink_rcv_msg+0x10/0x10 |
| ? arch_stack_walk+0x9e/0xf0 |
| ? rcu_is_watching+0x34/0x60 |
| ? lock_acquire+0xd5/0x410 |
| ? rcu_is_watching+0x34/0x60 |
| netlink_rcv_skb+0xe0/0x210 |
| ? __pfx_rtnetlink_rcv_msg+0x10/0x10 |
| ? __pfx_netlink_rcv_skb+0x10/0x10 |
| ? rcu_is_watching+0x34/0x60 |
| ? __pfx___netlink_lookup+0x10/0x10 |
| ? lock_release+0x62/0x200 |
| ? netlink_deliver_tap+0xfd/0x290 |
| ? rcu_is_watching+0x34/0x60 |
| ? lock_release+0x62/0x200 |
| ? netlink_deliver_tap+0x95/0x290 |
| netlink_unicast+0x31f/0x480 |
| ? __pfx_netlink_unicast+0x10/0x10 |
| ? rcu_is_watching+0x34/0x60 |
| ? lock_acquire+0xd5/0x410 |
| netlink_sendmsg+0x369/0x660 |
| ? lock_release+0x62/0x200 |
| ? __pfx_netlink_sendmsg+0x10/0x10 |
| ? import_ubuf+0xb9/0xf0 |
| ? __import_iovec+0x254/0x2b0 |
| ? lock_release+0x62/0x200 |
| ? __pfx_netlink_sendmsg+0x10/0x10 |
| ____sys_sendmsg+0x559/0x5a0 |
| ? __pfx_____sys_sendmsg+0x10/0x10 |
| ? __pfx_copy_msghdr_from_user+0x10/0x10 |
| ? rcu_is_watching+0x34/0x60 |
| ? do_read_fault+0x213/0x4a0 |
| ? rcu_is_watching+0x34/0x60 |
| ___sys_sendmsg+0xe4/0x150 |
| ? __pfx____sys_sendmsg+0x10/0x10 |
| ? do_fault+0x2cc/0x6f0 |
| ? handle_pte_fault+0x2e3/0x3d0 |
| ? __pfx_handle_pte_fault+0x10/0x10 |
| ? preempt_count_sub+0x14/0xc0 |
| ? __down_read_trylock+0x150/0x270 |
| ? __handle_mm_fault+0x404/0x8e0 |
| ? __pfx___handle_mm_fault+0x10/0x10 |
| ? lock_release+0x62/0x200 |
| ? __rcu_read_unlock+0x65/0x90 |
| ? rcu_is_watching+0x34/0x60 |
| __sys_sendmsg+0xd5/0x150 |
| ? __pfx___sys_sendmsg+0x10/0x10 |
| ? __up_read+0x192/0x480 |
| ? lock_release+0x62/0x200 |
| ? __rcu_read_unlock+0x65/0x90 |
| ? rcu_is_watching+0x34/0x60 |
| do_syscall_64+0x6d/0x140 |
| entry_SYSCALL_64_after_hwframe+0x76/0x7e |
| RIP: 0033:0x7f63a5b13367 |
| Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 |
| RSP: 002b:00007fff8c726bc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e |
| RAX: ffffffffffffffda RBX: 0000000067b687c2 RCX: 00007f63a5b13367 |
| RDX: 0000000000000000 RSI: 00007fff8c726c30 RDI: 0000000000000004 |
| RBP: 00007fff8c726cb8 R08: 0000000000000000 R09: 0000000000000034 |
| R10: 00007fff8c726c7c R11: 0000000000000246 R12: 0000000000000001 |
| R13: 0000000000000000 R14: 00007fff8c726cd0 R15: 00007fff8c726cd0 |
| </TASK> |
| irq event stamp: 0 |
| hardirqs last enabled at (0): [<0000000000000000>] 0x0 |
| hardirqs last disabled at (0): [<ffffffff813f9e58>] copy_process+0xd08/0x2830 |
| softirqs last enabled at (0): [<ffffffff813f9e58>] copy_process+0xd08/0x2830 |
| softirqs last disabled at (0): [<0000000000000000>] 0x0 |
| ---[ end trace 0000000000000000 ]--- |
| |
| Thus, when calculating ifinfo message size, take VF GUIDs sizes into |
| account when supported. |
| |
| The Linux kernel CVE team has assigned CVE-2025-22075 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 5.10.236 with commit 0f5489707cf528f9df2f39a3045c1ee713ec90e7 |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 5.15.180 with commit bb7bdf636cef74cdd7a7d548bdc7457ae161f617 |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 6.1.134 with commit 5fed5f6de3cf734b231a11775748a6871ee3020f |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 6.6.87 with commit 15f150771e0ec97f8ab1657e7d2568e593c7fa04 |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 6.12.23 with commit 28b21ee8e8fb326ba961a4bbce04ec04c65e705a |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 6.13.11 with commit 365c1ae819455561d4746aafabad673e4bcb0163 |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 6.14.2 with commit 5f39454468329bb7fc7fc4895a6ba6ae3b95027e |
| Issue introduced in 5.5 with commit 30aad41721e087babcf27c5192474724d555936c and fixed in 6.15 with commit 23f00807619d15063d676218f36c5dfeda1eb420 |
| |
| 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-2025-22075 |
| 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: |
| net/core/rtnetlink.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/0f5489707cf528f9df2f39a3045c1ee713ec90e7 |
| https://git.kernel.org/stable/c/bb7bdf636cef74cdd7a7d548bdc7457ae161f617 |
| https://git.kernel.org/stable/c/5fed5f6de3cf734b231a11775748a6871ee3020f |
| https://git.kernel.org/stable/c/15f150771e0ec97f8ab1657e7d2568e593c7fa04 |
| https://git.kernel.org/stable/c/28b21ee8e8fb326ba961a4bbce04ec04c65e705a |
| https://git.kernel.org/stable/c/365c1ae819455561d4746aafabad673e4bcb0163 |
| https://git.kernel.org/stable/c/5f39454468329bb7fc7fc4895a6ba6ae3b95027e |
| https://git.kernel.org/stable/c/23f00807619d15063d676218f36c5dfeda1eb420 |
