| 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-2024-35901: net: mana: Fix Rx DMA datasize and skb_over_panic |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: mana: Fix Rx DMA datasize and skb_over_panic |
| |
| mana_get_rxbuf_cfg() aligns the RX buffer's DMA datasize to be |
| multiple of 64. So a packet slightly bigger than mtu+14, say 1536, |
| can be received and cause skb_over_panic. |
| |
| Sample dmesg: |
| [ 5325.237162] skbuff: skb_over_panic: text:ffffffffc043277a len:1536 put:1536 head:ff1100018b517000 data:ff1100018b517100 tail:0x700 end:0x6ea dev:<NULL> |
| [ 5325.243689] ------------[ cut here ]------------ |
| [ 5325.245748] kernel BUG at net/core/skbuff.c:192! |
| [ 5325.247838] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI |
| [ 5325.258374] RIP: 0010:skb_panic+0x4f/0x60 |
| [ 5325.302941] Call Trace: |
| [ 5325.304389] <IRQ> |
| [ 5325.315794] ? skb_panic+0x4f/0x60 |
| [ 5325.317457] ? asm_exc_invalid_op+0x1f/0x30 |
| [ 5325.319490] ? skb_panic+0x4f/0x60 |
| [ 5325.321161] skb_put+0x4e/0x50 |
| [ 5325.322670] mana_poll+0x6fa/0xb50 [mana] |
| [ 5325.324578] __napi_poll+0x33/0x1e0 |
| [ 5325.326328] net_rx_action+0x12e/0x280 |
| |
| As discussed internally, this alignment is not necessary. To fix |
| this bug, remove it from the code. So oversized packets will be |
| marked as CQE_RX_TRUNCATED by NIC, and dropped. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35901 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 2fbbd712baf1c60996554326728bbdbef5616e12 and fixed in 6.6.26 with commit ca58927b00385005f488b6a9905ced7a4f719aad |
| Issue introduced in 6.4 with commit 2fbbd712baf1c60996554326728bbdbef5616e12 and fixed in 6.8.5 with commit 05cb7c41fa1a7a7b2c2a6b81bbe7c67f5c11932b |
| Issue introduced in 6.4 with commit 2fbbd712baf1c60996554326728bbdbef5616e12 and fixed in 6.9 with commit c0de6ab920aafb56feab56058e46b688e694a246 |
| |
| 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-2024-35901 |
| 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/ethernet/microsoft/mana/mana_en.c |
| include/net/mana/mana.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/ca58927b00385005f488b6a9905ced7a4f719aad |
| https://git.kernel.org/stable/c/05cb7c41fa1a7a7b2c2a6b81bbe7c67f5c11932b |
| https://git.kernel.org/stable/c/c0de6ab920aafb56feab56058e46b688e694a246 |
