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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/pinctrl/cirrus/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/pinctrl/cirrus/Makefile')
| -rw-r--r-- | drivers/pinctrl/cirrus/Makefile | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pinctrl/cirrus/Makefile b/drivers/pinctrl/cirrus/Makefile new file mode 100644 index 000000000..9b618d766 --- /dev/null +++ b/drivers/pinctrl/cirrus/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Cirrus Logic pinctrl drivers +obj-$(CONFIG_PINCTRL_CS42L43) += pinctrl-cs42l43.o + +obj-$(CONFIG_PINCTRL_LOCHNAGAR) += pinctrl-lochnagar.o + +pinctrl-madera-objs := pinctrl-madera-core.o +ifeq ($(CONFIG_PINCTRL_CS47L15),y) +pinctrl-madera-objs += pinctrl-cs47l15.o +endif +ifeq ($(CONFIG_PINCTRL_CS47L35),y) +pinctrl-madera-objs += pinctrl-cs47l35.o +endif +ifeq ($(CONFIG_PINCTRL_CS47L85),y) +pinctrl-madera-objs += pinctrl-cs47l85.o +endif +ifeq ($(CONFIG_PINCTRL_CS47L90),y) +pinctrl-madera-objs += pinctrl-cs47l90.o +endif +ifeq ($(CONFIG_PINCTRL_CS47L92),y) +pinctrl-madera-objs += pinctrl-cs47l92.o +endif + +obj-$(CONFIG_PINCTRL_MADERA) += pinctrl-madera.o |