Rob Clark efd02b5cad dma-buf/sw_sync: Avoid recursive lock during fence signal ... [ Upstream commit e531fdb5cd ] If a signal callback releases the sw_sync fence, that will trigger a deadlock as the timeline_fence_release recurses onto the fence->lock (used both for signaling and the the timeline tree). To avoid that, temporarily hold an extra reference to the signalled fences until after we drop the lock. (This is an alternative implementation of https://patchwork.kernel.org/patch/11664717/ which avoids some potential UAF issues with the original patch.) v2: Remove now obsolete comment, use list_move_tail() and list_del_init() Reported-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Fixes: d3c6dd1fb3 ("dma-buf/sw_sync: Synchronize signal vs syncpt free") Signed-off-by: Rob Clark <robdclark@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230818145939.39697-1-robdclark@gmail.com Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-08-30 16:18:21 +02:00
..
heaps	dma-buf: cma_heap: Fix mutex locking section	2022-03-08 19:12:37 +01:00
dma-buf-sysfs-stats.c	dma-buf: Delete the DMA-BUF attachment sysfs statistics	2021-07-20 11:06:59 +02:00
dma-buf-sysfs-stats.h	dma-buf: Delete the DMA-BUF attachment sysfs statistics	2021-07-20 11:06:59 +02:00
dma-buf.c	dma-buf/poll: Get a file reference for outstanding fence callbacks	2022-07-12 16:34:51 +02:00
dma-fence-array.c	dma_fence_array: Fix PENDING_ERROR leak in dma_fence_array_signaled()	2022-01-27 11:02:59 +01:00
dma-fence-chain.c	dma-buf: some dma_fence_chain improvements	2021-06-14 19:33:16 +02:00
dma-fence.c	drm/syncobj: use newly allocated stub fences	2021-04-08 12:21:13 +02:00
dma-heap.c	dma-buf: fix racing conflict of dma_heap_add()	2022-12-02 17:41:06 +01:00
dma-resv.c	dma-buf: fix dma_resv_test_signaled test_all handling v2	2021-07-08 14:59:08 +02:00
Kconfig	dma-buf: DMABUF_SYSFS_STATS should depend on DMA_SHARED_BUFFER	2021-09-07 12:42:21 +05:30
Makefile	dmabuf: Add the capability to expose DMA-BUF stats in sysfs	2021-06-15 11:50:24 +02:00
selftest.c
selftest.h
selftests.h
seqno-fence.c
st-dma-fence-chain.c	dma-buf: add dma_fence_chain_alloc/free v3	2021-06-14 19:38:34 +02:00
st-dma-fence.c
sw_sync.c	dma-buf/sw_sync: Avoid recursive lock during fence signal	2023-08-30 16:18:21 +02:00
sync_debug.c
sync_debug.h
sync_file.c	dma-buf/sync_file: Don't leak fences on merge failure	2021-07-12 13:34:49 +02:00
sync_trace.h
udmabuf.c	udmabuf: Set ubuf->sg = NULL if the creation of sg table fails	2022-10-26 12:35:39 +02:00