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| author | Shivank Garg <shivankg@amd.com> | 2026-08-22 19:22:05 +0000 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-09-09 17:51:44 +0530 |
| commit | e873c74132f0c5f1452816cd9bb26208f0bba1e1 (patch) | |
| tree | cc1ce1567f5b982359331863ebd9da38741f8d2e /tools/testing/radix-tree/Makefile | |
| download | linux-stable-e873c74132f0c5f1452816cd9bb26208f0bba1e1.tar.gz linux-stable-e873c74132f0c5f1452816cd9bb26208f0bba1e1.zip | |
dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()grafted
When dma_device_put() drops the last reference on chan->device->ref,
dma_device_release() runs and may free the dma_device along with its
channels.
dma_chan_put() then still reads chan->device->owner via
dma_chan_to_owner() for the trailing module_put(). KASAN catches it:
slab-use-after-free in dma_chan_put+0x3e6/0x4c0
Read of size 8 by task insmod/6319
Freed by task 6319:
kfree+0x225/0x470
dma_chan_put+0x395/0x4c0
dmaengine_put+0xf8/0x160
Cache the module owner in dma_chan_put() before the put so the trailing
module_put() does not need chan->device.
Fixes: 8ad342a86359 ("dmaengine: Add reference counting to dma_device struct")
Suggested-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/patchset/20260518-dmaengine-kref-fix-v1-1-4d6125048fb7@amd.com
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Shivank Garg <shivankg@amd.com>
Link: https://patch.msgid.link/20260822-dmaengine-kref-fix-v5-3-d4a4ee47d927@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'tools/testing/radix-tree/Makefile')
| -rw-r--r-- | tools/testing/radix-tree/Makefile | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile new file mode 100644 index 000000000..b2a6660bb --- /dev/null +++ b/tools/testing/radix-tree/Makefile @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0 + +.PHONY: clean + +TARGETS = main idr-test multiorder xarray maple +CORE_OFILES = $(SHARED_OFILES) xarray.o maple.o test.o +OFILES = main.o $(CORE_OFILES) regression1.o regression2.o \ + regression3.o regression4.o tag_check.o multiorder.o idr-test.o \ + iteration_check.o iteration_check_2.o benchmark.o + +targets: generated/map-shift.h generated/bit-length.h $(TARGETS) + +include ../shared/shared.mk + +main: $(OFILES) + +xarray.o: ../../../lib/test_xarray.c +idr-test.o: ../../../lib/test_ida.c +idr-test: idr-test.o $(CORE_OFILES) + +xarray: $(CORE_OFILES) xarray.o + +maple: $(CORE_OFILES) maple.o + +multiorder: multiorder.o $(CORE_OFILES) + +clean: + $(RM) $(TARGETS) *.o radix-tree.c idr.c generated/* + +$(OFILES): $(SHARED_DEPS) *.h |