Commit fbe17a8b authored Oct 20, 2023 by Francis Laniel Committed by Greg Kroah-Hartman Nov 08, 2023

selftests/ftrace: Add new test case which checks non unique symbol

[ Upstream commit 03b80ff8023adae6780e491f66e932df8165e3a0 ]

If name_show() is non unique, this test will try to install a kprobe on this
function which should fail returning EADDRNOTAVAIL.
On kernel where name_show() is not unique, this test is skipped.

Link: https://lore.kernel.org/all/20231020104250.9537-3-flaniel@linux.microsoft.com/



Cc: stable@vger.kernel.org
Signed-off-by: Francis Laniel <flaniel@linux.microsoft.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 4d057ca8

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc

0 → 100644

+13 −0

Original line number	Diff line number	Diff line
		#!/bin/sh
		# SPDX-License-Identifier: GPL-2.0
		# description: Test failure of registering kprobe on non unique symbol
		# requires: kprobe_events

		SYMBOL='name_show'

		# We skip this test on kernel where SYMBOL is unique or does not exist.
		if [ "$(grep -c -E "[[:alnum:]]+ t ${SYMBOL}" /proc/kallsyms)" -le '1' ]; then
		exit_unsupported
		fi

		! echo "p:test_non_unique ${SYMBOL}" > kprobe_events