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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 /arch/mips/pic32/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 'arch/mips/pic32/Kconfig')
| -rw-r--r-- | arch/mips/pic32/Kconfig | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/mips/pic32/Kconfig b/arch/mips/pic32/Kconfig new file mode 100644 index 000000000..cd14a071e --- /dev/null +++ b/arch/mips/pic32/Kconfig @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0 +if MACH_PIC32 + +choice + prompt "Machine Type" + +config PIC32MZDA + bool "Microchip PIC32MZDA Platform" + select BOOT_ELF32 + select BOOT_RAW + select CEVT_R4K + select CSRC_R4K + select DMA_NONCOHERENT + select SYS_HAS_CPU_MIPS32_R2 + select SYS_HAS_EARLY_PRINTK + select SYS_SUPPORTS_32BIT_KERNEL + select SYS_SUPPORTS_LITTLE_ENDIAN + select GPIOLIB + select COMMON_CLK + select LIBFDT + select USE_OF + select PINCTRL + help + Support for the Microchip PIC32MZDA microcontroller. + + This is a 32-bit microcontroller with support for external or + internally packaged DDR2 memory up to 128MB. + + For more information, see <http://www.microchip.com/>. + +endchoice + +choice + prompt "Devicetree selection" + default DTB_PIC32_NONE + help + Select the devicetree. + +config DTB_PIC32_NONE + bool "None" + +config DTB_PIC32_MZDA_SK + bool "PIC32MZDA Starter Kit" + depends on PIC32MZDA + select BUILTIN_DTB + +endchoice + +endif # MACH_PIC32 |