linux/drivers/dma-buf
Christian König a3f7c10a26 dma-buf/dma-resv: check if the new fence is really later
Previously when we added a fence to a dma_resv object we always
assumed the the newer than all the existing fences.

With Jason's work to add an UAPI to explicit export/import that's not
necessary the case any more. So without this check we would allow
userspace to force the kernel into an use after free error.

Since the change is very small and defensive it's probably a good
idea to backport this to stable kernels as well just in case others
are using the dma_resv object in the same way.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220810172617.140047-1-christian.koenig@amd.com
Cc: stable@vger.kernel.org # v5.19+
2022-08-25 13:10:30 +02:00
..
heaps dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
dma-buf-sysfs-stats.c kobject: remove kset from struct kset_uevent_ops callbacks 2021-12-28 11:26:18 +01:00
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 drm for 5.20/6.0 2022-08-03 19:52:08 -07:00
dma-fence-array.c dma-buf: handle empty dma_fence_arrays gracefully 2022-03-29 09:14:30 +02:00
dma-fence-chain.c dma-buf: cleanup dma_fence_chain_walk 2022-05-30 11:24:50 +02:00
dma-fence-unwrap.c dma-buf: revert "return only unsignaled fences in dma_fence_unwrap_for_each v3" 2022-07-14 14:41:30 +02:00
dma-fence.c dma-buf: add dma_fence_describe and dma_resv_describe v2 2021-11-11 09:35:13 +01:00
dma-heap.c dma-buf: heaps: Fix potential spectre v1 gadget 2022-02-01 13:18:09 +05:30
dma-resv.c dma-buf/dma-resv: check if the new fence is really later 2022-08-25 13:10:30 +02:00
Kconfig dma-buf: deprecate DMABUF_SYSFS_STATS 2022-06-23 10:51:43 +02:00
Makefile dma-buf: cleanup dma_fence_unwrap implementation 2022-05-30 14:16:32 +02:00
selftest.c dma-buf: Introduce selftesting framework 2019-08-19 18:01:34 +01:00
selftest.h dma-buf: Introduce selftesting framework 2019-08-19 18:01:34 +01:00
selftests.h dma-buf: add dma_fence_unwrap v2 2022-03-25 14:18:28 +01:00
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-unwrap.c dma-buf: generalize dma_fence unwrap & merging v3 2022-05-30 14:24:04 +02:00
st-dma-fence.c dma-buf: Avoid comma separated statements 2021-02-09 17:14:11 +01:00
st-dma-resv.c dma-buf: drop seq count based update 2022-04-07 12:53:54 +02:00
sw_sync.c compat_ioctl: move more drivers to compat_ptr_ioctl 2019-10-23 17:23:44 +02:00
sync_debug.c Linux 5.2-rc5 2019-06-19 12:07:29 +02:00
sync_debug.h dma-buf: Remove unused sync_dump() 2019-04-23 09:30:07 +01:00
sync_file.c dma-buf: generalize dma_fence unwrap & merging v3 2022-05-30 14:24:04 +02:00
sync_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udmabuf.c Linux 5.19-rc6 2022-07-13 10:54:56 +10:00