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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/clk/sprd/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/clk/sprd/Kconfig')
| -rw-r--r-- | drivers/clk/sprd/Kconfig | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/clk/sprd/Kconfig b/drivers/clk/sprd/Kconfig new file mode 100644 index 000000000..2f19c8d58 --- /dev/null +++ b/drivers/clk/sprd/Kconfig @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0-only +config SPRD_COMMON_CLK + tristate "Clock support for Spreadtrum SoCs" + depends on ARCH_SPRD || COMPILE_TEST + default ARCH_SPRD + select REGMAP_MMIO + +if SPRD_COMMON_CLK + +# SoC Drivers + +config SPRD_SC9860_CLK + tristate "Support for the Spreadtrum SC9860 clocks" + depends on (ARM64 && ARCH_SPRD) || COMPILE_TEST + default ARM64 && ARCH_SPRD + +config SPRD_SC9863A_CLK + tristate "Support for the Spreadtrum SC9863A clocks" + depends on (ARM64 && ARCH_SPRD) || COMPILE_TEST + default ARM64 && ARCH_SPRD + help + Support for the global clock controller on sc9863a devices. + Say Y if you want to use peripheral devices on sc9863a SoC. + +config SPRD_UMS512_CLK + tristate "Support for the Spreadtrum UMS512 clocks" + depends on (ARM64 && ARCH_SPRD) || COMPILE_TEST + default ARM64 && ARCH_SPRD + help + Support for the global clock controller on ums512 devices. + Say Y if you want to use peripheral devices on ums512 SoC. +endif |