diff options
| 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 /scripts/min-tool-version.sh | |
| 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 'scripts/min-tool-version.sh')
| -rwxr-xr-x | scripts/min-tool-version.sh | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh new file mode 100755 index 000000000..99bfdcaa3 --- /dev/null +++ b/scripts/min-tool-version.sh @@ -0,0 +1,49 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0-only +# +# Print the minimum supported version of the given tool. +# When you raise the minimum version, please update +# Documentation/process/changes.rst as well. + +set -e + +if [ $# != 1 ]; then + echo "Usage: $0 toolname" >&2 + exit 1 +fi + +case "$1" in +binutils) + echo 2.30.0 + ;; +gcc) + if [ "$ARCH" = parisc64 ]; then + echo 12.0.0 + else + echo 8.1.0 + fi + ;; +llvm) + if [ "$SRCARCH" = loongarch ]; then + echo 18.0.0 + else + echo 17.0.1 + fi + ;; +rustc) + if [ "$SRCARCH" = "s390" ]; then + echo 1.96.0 + elif [ "$ARCH" = powerpc ]; then + echo 1.95.0 + else + echo 1.85.0 + fi + ;; +bindgen) + echo 0.71.1 + ;; +*) + echo "$1: unknown tool" >&2 + exit 1 + ;; +esac |