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, 32 insertions, 0 deletions

diff --git a/rust/helpers/device.c b/rust/helpers/device.c
new file mode 100644
index 000000000..3be4ee590
--- /dev/null
+++ b/rust/helpers/device.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/device.h>
+
+__rust_helper int rust_helper_devm_add_action(struct device *dev,
+					      void (*action)(void *),
+					      void *data)
+{
+	return devm_add_action(dev, action, data);
+}
+
+__rust_helper int rust_helper_devm_add_action_or_reset(struct device *dev,
+						       void (*action)(void *),
+						       void *data)
+{
+	return devm_add_action_or_reset(dev, action, data);
+}
+
+__rust_helper void *rust_helper_dev_get_drvdata(const struct device *dev)
+{
+	return dev_get_drvdata(dev);
+}
+
+__rust_helper void rust_helper_dev_set_drvdata(struct device *dev, void *data)
+{
+	dev_set_drvdata(dev, data);
+}
+
+__rust_helper const char *rust_helper_dev_name(const struct device *dev)
+{
+	return dev_name(dev);
+}