Lance Richardson 28e8b7406d dma: fix call order in dmam_free_coherent ... dmam_free_coherent() frees a DMA allocation, which makes the freed vaddr available for reuse, then calls devres_destroy() to remove and free the data structure used to track the DMA allocation. Between the two calls, it is possible for a concurrent task to make an allocation with the same vaddr and add it to the devres list. If this happens, there will be two entries in the devres list with the same vaddr and devres_destroy() can free the wrong entry, triggering the WARN_ON() in dmam_match. Fix by destroying the devres entry before freeing the DMA allocation. Tested: kokonut //net/encryption http://sponge2/b9145fe6-0f72-4325-ac2f-a84d81075b03 Fixes: 9ac7849e35 ("devres: device resource management") Signed-off-by: Lance Richardson <rlance@google.com> Signed-off-by: Christoph Hellwig <hch@lst.de>		2024-07-19 07:27:28 +02:00
..
coherent.c	dma-mapping: clear dev->dma_mem to NULL after freeing it	2023-12-15 12:32:45 +01:00
contiguous.c	mm/cma: drop CONFIG_CMA_DEBUG	2024-02-22 10:24:53 -08:00
debug.c	dma-mapping fixes for Linux 6.8	2024-01-18 16:49:34 -08:00
debug.h
direct.c	swiotlb: reduce swiotlb pool lookups	2024-07-10 07:59:03 +02:00
direct.h	swiotlb: reduce swiotlb pool lookups	2024-07-10 07:59:03 +02:00
dummy.c
Kconfig	dma: compile-out DMA sync op calls when not used	2024-05-07 13:29:53 +02:00
Makefile	dma-mapping: remove CONFIG_DMA_REMAP	2022-03-03 14:00:57 +03:00
map_benchmark.c	dma-mapping: benchmark: Don't starve others when doing the test	2024-07-09 07:48:32 +02:00
mapping.c	dma: fix call order in dmam_free_coherent	2024-07-19 07:27:28 +02:00
ops_helpers.c
pool.c	mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER	2024-01-08 15:27:15 -08:00
remap.c	dma-remap: use kvmalloc_array/kvfree for larger dma memory remap	2023-06-07 15:06:28 +02:00
swiotlb.c	swiotlb: fix kernel-doc description for swiotlb_del_transient	2024-07-13 07:36:10 +02:00