selftests/bpf: Check that JMP32 pointer vs zero jumps are not predictedgrafted

Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which
the verifier used to skip, contains an out of bounds map value access,
hence w/o the previous patch the program is accepted. See previous patch
for detailed description.

Reported-by: Nicholas Carlini <npc@anthropic.com>
Suggested-by: Nicholas Carlini <npc@anthropic.com>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/powerpc/tools/checkpatch.sh b/arch/powerpc/tools/checkpatch.sh
new file mode 100755
index 000000000..91c04802e
--- /dev/null
+++ b/arch/powerpc/tools/checkpatch.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2018, Michael Ellerman, IBM Corporation.
+#
+# Wrapper around checkpatch that uses our preferred settings
+
+script_base=$(realpath $(dirname $0))
+
+exec $script_base/../../../scripts/checkpatch.pl \
+	--subjective \
+	--no-summary \
+	--show-types \
+	--ignore ARCH_INCLUDE_LINUX \
+	--ignore BIT_MACRO \
+	--ignore COMPARISON_TO_NULL \
+	--ignore EMAIL_SUBJECT \
+	--ignore FILE_PATH_CHANGES \
+	--ignore GLOBAL_INITIALISERS \
+	--ignore LINE_SPACING \
+	--ignore MULTIPLE_ASSIGNMENTS \
+	--ignore DT_SPLIT_BINDING_PATCH \
+	$@