| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-26862: packet: annotate data-races around ignore_outgoing |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| packet: annotate data-races around ignore_outgoing |
| |
| ignore_outgoing is read locklessly from dev_queue_xmit_nit() |
| and packet_getsockopt() |
| |
| Add appropriate READ_ONCE()/WRITE_ONCE() annotations. |
| |
| syzbot reported: |
| |
| BUG: KCSAN: data-race in dev_queue_xmit_nit / packet_setsockopt |
| |
| write to 0xffff888107804542 of 1 bytes by task 22618 on cpu 0: |
| packet_setsockopt+0xd83/0xfd0 net/packet/af_packet.c:4003 |
| do_sock_setsockopt net/socket.c:2311 [inline] |
| __sys_setsockopt+0x1d8/0x250 net/socket.c:2334 |
| __do_sys_setsockopt net/socket.c:2343 [inline] |
| __se_sys_setsockopt net/socket.c:2340 [inline] |
| __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340 |
| do_syscall_64+0xd3/0x1d0 |
| entry_SYSCALL_64_after_hwframe+0x6d/0x75 |
| |
| read to 0xffff888107804542 of 1 bytes by task 27 on cpu 1: |
| dev_queue_xmit_nit+0x82/0x620 net/core/dev.c:2248 |
| xmit_one net/core/dev.c:3527 [inline] |
| dev_hard_start_xmit+0xcc/0x3f0 net/core/dev.c:3547 |
| __dev_queue_xmit+0xf24/0x1dd0 net/core/dev.c:4335 |
| dev_queue_xmit include/linux/netdevice.h:3091 [inline] |
| batadv_send_skb_packet+0x264/0x300 net/batman-adv/send.c:108 |
| batadv_send_broadcast_skb+0x24/0x30 net/batman-adv/send.c:127 |
| batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline] |
| batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline] |
| batadv_iv_send_outstanding_bat_ogm_packet+0x3f0/0x4b0 net/batman-adv/bat_iv_ogm.c:1700 |
| process_one_work kernel/workqueue.c:3254 [inline] |
| process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335 |
| worker_thread+0x526/0x730 kernel/workqueue.c:3416 |
| kthread+0x1d1/0x210 kernel/kthread.c:388 |
| ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 |
| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 |
| |
| value changed: 0x00 -> 0x01 |
| |
| Reported by Kernel Concurrency Sanitizer on: |
| CPU: 1 PID: 27 Comm: kworker/u8:1 Tainted: G W 6.8.0-syzkaller-08073-g480e035fc4c7 #0 |
| Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 |
| Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet |
| |
| The Linux kernel CVE team has assigned CVE-2024-26862 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 5.4.273 with commit 84c510411e321caff3c07e6cd0f917f06633cfc0 |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 5.10.214 with commit 68e84120319d4fc298fcdb14cf0bea6a0f64ffbd |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 5.15.153 with commit d35b62c224e70797f8a1c37fe9bc4b3e294b7560 |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 6.1.83 with commit ef7eed7e11d23337310ecc2c014ecaeea52719c5 |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 6.6.23 with commit 2c02c5059c78a52d170bdee4a369b470de6deb37 |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 6.7.11 with commit ee413f30ec4fe94a0bdf32c8f042cb06fa913234 |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 6.8.2 with commit 8b1e273c6afcf00d3c40a54ada7d6aac1b503b97 |
| Issue introduced in 4.20 with commit fa788d986a3aac5069378ed04697bd06f83d3488 and fixed in 6.9 with commit 6ebfad33161afacb3e1e59ed1c2feefef70f9f97 |
| |
| 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-2024-26862 |
| 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/dev.c |
| net/packet/af_packet.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/84c510411e321caff3c07e6cd0f917f06633cfc0 |
| https://git.kernel.org/stable/c/68e84120319d4fc298fcdb14cf0bea6a0f64ffbd |
| https://git.kernel.org/stable/c/d35b62c224e70797f8a1c37fe9bc4b3e294b7560 |
| https://git.kernel.org/stable/c/ef7eed7e11d23337310ecc2c014ecaeea52719c5 |
| https://git.kernel.org/stable/c/2c02c5059c78a52d170bdee4a369b470de6deb37 |
| https://git.kernel.org/stable/c/ee413f30ec4fe94a0bdf32c8f042cb06fa913234 |
| https://git.kernel.org/stable/c/8b1e273c6afcf00d3c40a54ada7d6aac1b503b97 |
| https://git.kernel.org/stable/c/6ebfad33161afacb3e1e59ed1c2feefef70f9f97 |
