CVE-2024-26787

mmc: mmci: stm32: fix DMA API overlapping mappings warning

MEDIUM

5.5

CVSS Score

Published: April 4, 2024 at 08:20 AM UTC

Updated: October 15, 2026 at 01:17 AM UTC

3 products affected across 3 vendorsLinux KernelDebian LinuxSIMATIC S7-1500 TM MFP

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

10.0

Linux Kernel · Linux

95%

4.20 ≤ v < 5.10.2135.11 ≤ v < 5.15.1525.16 ≤ v < 6.1.816.2 ≤ v < 6.6.216.7 ≤ v < 6.7.946b723dd867d599420fb640c0eaf2a866ef721d46.8 6.8 rc1 6.8 rc2 6.8 rc3 6.8 rc4 6.8 rc5 6.8 rc6

Vendor states this is fixed in 0224cbc53ba82b84affa7619b6d1b1a254bc2c53 (fixed)

Vendor states this is fixed in 176e66269f0de327375fc0ea51c12c2f5a97e4c4 (fixed)

Vendor states this is fixed in 5ae5060e17a3fc38e54c3e5bd8abd6b1d5bfae7c (fixed)

Vendor states this is fixed in 6b1ba3f9040be5efc4396d86c9752cdc564730be (fixed)

Vendor states this is fixed in 70af82bb9c897faa25a44e4181f36c60312b71ef (fixed)

Vendor states this is fixed in d610a307225951929b9dff807788439454476f85 (fixed)

Vendor states this is fixed in 4.20 (unaffected)

Vendor states this is fixed in 5.10.213 (unaffected)

Vendor states this is fixed in 5.15.152 (unaffected)

Vendor states this is fixed in 6.1.81 (unaffected)

Vendor states this is fixed in 6.6.21 (unaffected)

Vendor states this is fixed in 6.7.9 (unaffected)