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| 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/gpu/Makefile | |
| 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/gpu/Makefile')
| -rw-r--r-- | drivers/gpu/Makefile | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile new file mode 100644 index 000000000..b4e5e338e --- /dev/null +++ b/drivers/gpu/Makefile @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0-only +# drm/tegra depends on host1x, so if both drivers are built-in care must be +# taken to initialize them in the correct order. Link order is the only way +# to ensure this currently. +# Similarly, buddy must come first since it is used by other drivers. +obj-$(CONFIG_GPU_BUDDY) += buddy.o +obj-y += host1x/ drm/ vga/ tests/ +obj-$(CONFIG_IMX_IPUV3_CORE) += ipu-v3/ +obj-$(CONFIG_TRACE_GPU_MEM) += trace/ +obj-$(CONFIG_NOVA_CORE) += nova-core/ |