diff options
| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /drivers/media/test-drivers/Kconfig | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
Add a sleepable verifier test that loads a graph-node local kptr in an
explicit RCU read-side critical section, then passes its node to
bpf_rbtree_remove() after the section ends.
Before the verifier fix, the stale NON_OWN_REF flag makes the node look like
a live borrowed reference and the program is accepted. After the fix, the
pointer is demoted without NON_OWN_REF and the graph kfunc argument is
rejected.
Also exercise a graph kptr loaded while a spin lock provides implicit RCU
protection. The pointer must be invalidated when the lock is released, which
guards the required ordering between non-owning-reference invalidation and
RCU demotion.
Update the existing fault-protected load test state description. The
post-unlock pointer no longer carries NON_OWN_REF, but remains readable
because the load is rewritten to use BPF_PROBE_MEM.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'drivers/media/test-drivers/Kconfig')
| -rw-r--r-- | drivers/media/test-drivers/Kconfig | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/media/test-drivers/Kconfig b/drivers/media/test-drivers/Kconfig new file mode 100644 index 000000000..5a5379524 --- /dev/null +++ b/drivers/media/test-drivers/Kconfig @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: GPL-2.0-only + +menuconfig V4L_TEST_DRIVERS + bool "V4L test drivers" + depends on VIDEO_DEV + +if V4L_TEST_DRIVERS + +config VIDEO_VIM2M + tristate "Virtual Memory-to-Memory Driver" + depends on VIDEO_DEV + select VIDEOBUF2_VMALLOC + select V4L2_MEM2MEM_DEV + select MEDIA_CONTROLLER + help + This is a virtual test device for the memory-to-memory driver + framework. + +source "drivers/media/test-drivers/vicodec/Kconfig" +source "drivers/media/test-drivers/vimc/Kconfig" +source "drivers/media/test-drivers/vivid/Kconfig" +source "drivers/media/test-drivers/visl/Kconfig" + +endif #V4L_TEST_DRIVERS + +menuconfig DVB_TEST_DRIVERS + bool "DVB test drivers" + depends on DVB_CORE && MEDIA_SUPPORT && I2C + help + Enables DVB test drivers. + + This enables the DVB test drivers. They are meant as an aid for + DVB device driver writers and developers working on userspace + media applications. + +if DVB_TEST_DRIVERS + +source "drivers/media/test-drivers/vidtv/Kconfig" + +endif #DVB_TEST_DRIVERS |