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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/alchemy/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/alchemy/Kconfig')
| -rw-r--r-- | arch/mips/alchemy/Kconfig | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/mips/alchemy/Kconfig b/arch/mips/alchemy/Kconfig new file mode 100644 index 000000000..cf5ad52c0 --- /dev/null +++ b/arch/mips/alchemy/Kconfig @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: GPL-2.0 +choice + prompt "Machine type" + depends on MIPS_ALCHEMY + default MIPS_DB1XXX + +config MIPS_MTX1 + bool "4G Systems MTX-1 board" + select HAVE_PCI + select SYS_SUPPORTS_LITTLE_ENDIAN + select SYS_HAS_EARLY_PRINTK + +config MIPS_DB1XXX + bool "Alchemy DB1XXX / PB1XXX boards" + select HAVE_PCI + select HAVE_PATA_PLATFORM + select SYS_SUPPORTS_LITTLE_ENDIAN + select SYS_HAS_EARLY_PRINTK + help + Select this option if you have one of the following Alchemy + development boards: DB1000 DB1500 DB1100 DB1550 DB1200 DB1300 + PB1500 PB1100 PB1550 PB1200 + Board type is autodetected during boot. + +config MIPS_XXS1500 + bool "MyCable XXS1500 board" + select SYS_SUPPORTS_LITTLE_ENDIAN + select SYS_HAS_EARLY_PRINTK + +config MIPS_GPR + bool "Trapeze ITS GPR board" + select HAVE_PCI + select SYS_SUPPORTS_LITTLE_ENDIAN + select SYS_HAS_EARLY_PRINTK + +endchoice |