CVE-2024-26787

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mmc: mmci: stm32: fix DMA API overlapping mappings warning<br /> <br /> Turning on CONFIG_DMA_API_DEBUG_SG results in the following warning:<br /> <br /> DMA-API: mmci-pl18x 48220000.mmc: cacheline tracking EEXIST,<br /> overlapping mappings aren&amp;#39;t supported<br /> WARNING: CPU: 1 PID: 51 at kernel/dma/debug.c:568<br /> add_dma_entry+0x234/0x2f4<br /> Modules linked in:<br /> CPU: 1 PID: 51 Comm: kworker/1:2 Not tainted 6.1.28 #1<br /> Hardware name: STMicroelectronics STM32MP257F-EV1 Evaluation Board (DT)<br /> Workqueue: events_freezable mmc_rescan<br /> Call trace:<br /> add_dma_entry+0x234/0x2f4<br /> debug_dma_map_sg+0x198/0x350<br /> __dma_map_sg_attrs+0xa0/0x110<br /> dma_map_sg_attrs+0x10/0x2c<br /> sdmmc_idma_prep_data+0x80/0xc0<br /> mmci_prep_data+0x38/0x84<br /> mmci_start_data+0x108/0x2dc<br /> mmci_request+0xe4/0x190<br /> __mmc_start_request+0x68/0x140<br /> mmc_start_request+0x94/0xc0<br /> mmc_wait_for_req+0x70/0x100<br /> mmc_send_tuning+0x108/0x1ac<br /> sdmmc_execute_tuning+0x14c/0x210<br /> mmc_execute_tuning+0x48/0xec<br /> mmc_sd_init_uhs_card.part.0+0x208/0x464<br /> mmc_sd_init_card+0x318/0x89c<br /> mmc_attach_sd+0xe4/0x180<br /> mmc_rescan+0x244/0x320<br /> <br /> DMA API debug brings to light leaking dma-mappings as dma_map_sg and<br /> dma_unmap_sg are not correctly balanced.<br /> <br /> If an error occurs in mmci_cmd_irq function, only mmci_dma_error<br /> function is called and as this API is not managed on stm32 variant,<br /> dma_unmap_sg is never called in this error path.