CVE-2024-26787

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

State: Published
Severity: Not scored
Published: Apr 4, 2024
Updated: Oct 15, 2026
Reserved: Feb 19, 2024

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	46b723dd867d599420fb640c0eaf2a866ef721d4 to before 0224cbc53ba82b84affa7619b6d1b1a254bc2c53Affected 46b723dd867d599420fb640c0eaf2a866ef721d4 to before 5ae5060e17a3fc38e54c3e5bd8abd6b1d5bfae7cAffected 46b723dd867d599420fb640c0eaf2a866ef721d4 to before 70af82bb9c897faa25a44e4181f36c60312b71efAffected 46b723dd867d599420fb640c0eaf2a866ef721d4 to before 176e66269f0de327375fc0ea51c12c2f5a97e4c4Affected 46b723dd867d599420fb640c0eaf2a866ef721d4 to before d610a307225951929b9dff807788439454476f85Affected 46b723dd867d599420fb640c0eaf2a866ef721d4 to before 6b1ba3f9040be5efc4396d86c9752cdc564730beAffected
LinuxLinux	4.20Affected before 4.20Not affected 5.10.213 through 5.10.Not affected 5.15.152 through 5.15.Not affected 6.1.81 through 6.1.Not affected 6.6.21 through 6.6.Not affected 6.7.9 through 6.7.*Not affected 6.8 and laterNot affected

Product

Versions

LinuxLinux

46b723dd867d599420fb640c0eaf2a866ef721d4 to before 0224cbc53ba82b84affa7619b6d1b1a254bc2c53Affected
46b723dd867d599420fb640c0eaf2a866ef721d4 to before 5ae5060e17a3fc38e54c3e5bd8abd6b1d5bfae7cAffected
46b723dd867d599420fb640c0eaf2a866ef721d4 to before 70af82bb9c897faa25a44e4181f36c60312b71efAffected
46b723dd867d599420fb640c0eaf2a866ef721d4 to before 176e66269f0de327375fc0ea51c12c2f5a97e4c4Affected
46b723dd867d599420fb640c0eaf2a866ef721d4 to before d610a307225951929b9dff807788439454476f85Affected
46b723dd867d599420fb640c0eaf2a866ef721d4 to before 6b1ba3f9040be5efc4396d86c9752cdc564730beAffected

LinuxLinux

4.20Affected
before 4.20Not affected
5.10.213 through 5.10.*Not affected
5.15.152 through 5.15.*Not affected
6.1.81 through 6.1.*Not affected
6.6.21 through 6.6.*Not affected
6.7.9 through 6.7.*Not affected
6.8 and laterNot affected

References

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