| 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-2024-26787: mmc: mmci: stm32: fix DMA API overlapping mappings warning |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mmc: mmci: stm32: fix DMA API overlapping mappings warning |
| |
| Turning on CONFIG_DMA_API_DEBUG_SG results in the following warning: |
| |
| DMA-API: mmci-pl18x 48220000.mmc: cacheline tracking EEXIST, |
| overlapping mappings aren't supported |
| WARNING: CPU: 1 PID: 51 at kernel/dma/debug.c:568 |
| add_dma_entry+0x234/0x2f4 |
| Modules linked in: |
| CPU: 1 PID: 51 Comm: kworker/1:2 Not tainted 6.1.28 #1 |
| Hardware name: STMicroelectronics STM32MP257F-EV1 Evaluation Board (DT) |
| Workqueue: events_freezable mmc_rescan |
| Call trace: |
| add_dma_entry+0x234/0x2f4 |
| debug_dma_map_sg+0x198/0x350 |
| __dma_map_sg_attrs+0xa0/0x110 |
| dma_map_sg_attrs+0x10/0x2c |
| sdmmc_idma_prep_data+0x80/0xc0 |
| mmci_prep_data+0x38/0x84 |
| mmci_start_data+0x108/0x2dc |
| mmci_request+0xe4/0x190 |
| __mmc_start_request+0x68/0x140 |
| mmc_start_request+0x94/0xc0 |
| mmc_wait_for_req+0x70/0x100 |
| mmc_send_tuning+0x108/0x1ac |
| sdmmc_execute_tuning+0x14c/0x210 |
| mmc_execute_tuning+0x48/0xec |
| mmc_sd_init_uhs_card.part.0+0x208/0x464 |
| mmc_sd_init_card+0x318/0x89c |
| mmc_attach_sd+0xe4/0x180 |
| mmc_rescan+0x244/0x320 |
| |
| DMA API debug brings to light leaking dma-mappings as dma_map_sg and |
| dma_unmap_sg are not correctly balanced. |
| |
| If an error occurs in mmci_cmd_irq function, only mmci_dma_error |
| function is called and as this API is not managed on stm32 variant, |
| dma_unmap_sg is never called in this error path. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26787 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit 46b723dd867d599420fb640c0eaf2a866ef721d4 and fixed in 5.10.213 with commit 0224cbc53ba82b84affa7619b6d1b1a254bc2c53 |
| Issue introduced in 4.20 with commit 46b723dd867d599420fb640c0eaf2a866ef721d4 and fixed in 5.15.152 with commit 5ae5060e17a3fc38e54c3e5bd8abd6b1d5bfae7c |
| Issue introduced in 4.20 with commit 46b723dd867d599420fb640c0eaf2a866ef721d4 and fixed in 6.1.81 with commit 70af82bb9c897faa25a44e4181f36c60312b71ef |
| Issue introduced in 4.20 with commit 46b723dd867d599420fb640c0eaf2a866ef721d4 and fixed in 6.6.21 with commit 176e66269f0de327375fc0ea51c12c2f5a97e4c4 |
| Issue introduced in 4.20 with commit 46b723dd867d599420fb640c0eaf2a866ef721d4 and fixed in 6.7.9 with commit d610a307225951929b9dff807788439454476f85 |
| Issue introduced in 4.20 with commit 46b723dd867d599420fb640c0eaf2a866ef721d4 and fixed in 6.8 with commit 6b1ba3f9040be5efc4396d86c9752cdc564730be |
| |
| 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-2024-26787 |
| 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/mmc/host/mmci_stm32_sdmmc.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/0224cbc53ba82b84affa7619b6d1b1a254bc2c53 |
| https://git.kernel.org/stable/c/5ae5060e17a3fc38e54c3e5bd8abd6b1d5bfae7c |
| https://git.kernel.org/stable/c/70af82bb9c897faa25a44e4181f36c60312b71ef |
| https://git.kernel.org/stable/c/176e66269f0de327375fc0ea51c12c2f5a97e4c4 |
| https://git.kernel.org/stable/c/d610a307225951929b9dff807788439454476f85 |
| https://git.kernel.org/stable/c/6b1ba3f9040be5efc4396d86c9752cdc564730be |
