| 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-2024-26859: net/bnx2x: Prevent access to a freed page in page_pool |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/bnx2x: Prevent access to a freed page in page_pool |
| |
| Fix race condition leading to system crash during EEH error handling |
| |
| During EEH error recovery, the bnx2x driver's transmit timeout logic |
| could cause a race condition when handling reset tasks. The |
| bnx2x_tx_timeout() schedules reset tasks via bnx2x_sp_rtnl_task(), |
| which ultimately leads to bnx2x_nic_unload(). In bnx2x_nic_unload() |
| SGEs are freed using bnx2x_free_rx_sge_range(). However, this could |
| overlap with the EEH driver's attempt to reset the device using |
| bnx2x_io_slot_reset(), which also tries to free SGEs. This race |
| condition can result in system crashes due to accessing freed memory |
| locations in bnx2x_free_rx_sge() |
| |
| 799 static inline void bnx2x_free_rx_sge(struct bnx2x *bp, |
| 800 struct bnx2x_fastpath *fp, u16 index) |
| 801 { |
| 802 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index]; |
| 803 struct page *page = sw_buf->page; |
| .... |
| where sw_buf was set to NULL after the call to dma_unmap_page() |
| by the preceding thread. |
| |
| EEH: Beginning: 'slot_reset' |
| PCI 0011:01:00.0#10000: EEH: Invoking bnx2x->slot_reset() |
| bnx2x: [bnx2x_io_slot_reset:14228(eth1)]IO slot reset initializing... |
| bnx2x 0011:01:00.0: enabling device (0140 -> 0142) |
| bnx2x: [bnx2x_io_slot_reset:14244(eth1)]IO slot reset --> driver unload |
| Kernel attempted to read user page (0) - exploit attempt? (uid: 0) |
| BUG: Kernel NULL pointer dereference on read at 0x00000000 |
| Faulting instruction address: 0xc0080000025065fc |
| Oops: Kernel access of bad area, sig: 11 [#1] |
| ..... |
| Call Trace: |
| [c000000003c67a20] [c00800000250658c] bnx2x_io_slot_reset+0x204/0x610 [bnx2x] (unreliable) |
| [c000000003c67af0] [c0000000000518a8] eeh_report_reset+0xb8/0xf0 |
| [c000000003c67b60] [c000000000052130] eeh_pe_report+0x180/0x550 |
| [c000000003c67c70] [c00000000005318c] eeh_handle_normal_event+0x84c/0xa60 |
| [c000000003c67d50] [c000000000053a84] eeh_event_handler+0xf4/0x170 |
| [c000000003c67da0] [c000000000194c58] kthread+0x1c8/0x1d0 |
| [c000000003c67e10] [c00000000000cf64] ret_from_kernel_thread+0x5c/0x64 |
| |
| To solve this issue, we need to verify page pool allocations before |
| freeing. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26859 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 4.19.311 with commit 7bcc090c81116c66936a7415f2c6b1483a4bcfd9 |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 5.4.273 with commit 4f37d3a7e004bbf560c21441ca9c022168017ec4 |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 5.10.214 with commit 8eebff95ce9558be66a36aa7cfb43223f3ab4699 |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 5.15.153 with commit 8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598 |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 6.1.83 with commit cf7d8cba639ae792a42c2a137b495eac262ac36c |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 6.6.23 with commit 3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 6.7.11 with commit c51f8b6930db3f259b8820b589f2459d2df3fc68 |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 6.8.2 with commit 44f9f1abb0ecc43023225ab9539167facbabf0ec |
| Issue introduced in 4.2 with commit 4cace675d687ebd2d813e90af80ff87ee85202f9 and fixed in 6.9 with commit d27e2da94a42655861ca4baea30c8cd65546f25d |
| |
| 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-2024-26859 |
| 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/broadcom/bnx2x/bnx2x_cmn.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/7bcc090c81116c66936a7415f2c6b1483a4bcfd9 |
| https://git.kernel.org/stable/c/4f37d3a7e004bbf560c21441ca9c022168017ec4 |
| https://git.kernel.org/stable/c/8eebff95ce9558be66a36aa7cfb43223f3ab4699 |
| https://git.kernel.org/stable/c/8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598 |
| https://git.kernel.org/stable/c/cf7d8cba639ae792a42c2a137b495eac262ac36c |
| https://git.kernel.org/stable/c/3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb |
| https://git.kernel.org/stable/c/c51f8b6930db3f259b8820b589f2459d2df3fc68 |
| https://git.kernel.org/stable/c/44f9f1abb0ecc43023225ab9539167facbabf0ec |
| https://git.kernel.org/stable/c/d27e2da94a42655861ca4baea30c8cd65546f25d |
