This is a note to let you know that I've just added the patch titled test_kprobes: Fix implicit declaration error of test_kprobes to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: test_kprobes-fix-implicit-declaration-error-of-test_kprobes.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 63a4dc0a0bb0e9bfeb2c88ccda81abdde4cdd6b8 Mon Sep 17 00:00:00 2001 From: Li Hua <hucool.lihua@xxxxxxxxxx> Date: Mon, 21 Nov 2022 11:06:20 +0800 Subject: test_kprobes: Fix implicit declaration error of test_kprobes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Li Hua <hucool.lihua@xxxxxxxxxx> commit 63a4dc0a0bb0e9bfeb2c88ccda81abdde4cdd6b8 upstream. If KPROBES_SANITY_TEST and ARCH_CORRECT_STACKTRACE_ON_KRETPROBE is enabled, but STACKTRACE is not set. Build failed as below: lib/test_kprobes.c: In function ‘stacktrace_return_handler’: lib/test_kprobes.c:228:8: error: implicit declaration of function ‘stack_trace_save’; did you mean ‘stacktrace_driver’? [-Werror=implicit-function-declaration] ret = stack_trace_save(stack_buf, STACK_BUF_SIZE, 0); ^~~~~~~~~~~~~~~~ stacktrace_driver cc1: all warnings being treated as errors scripts/Makefile.build:250: recipe for target 'lib/test_kprobes.o' failed make[2]: *** [lib/test_kprobes.o] Error 1 To fix this error, Select STACKTRACE if ARCH_CORRECT_STACKTRACE_ON_KRETPROBE is enabled. Link: https://lore.kernel.org/all/20221121030620.63181-1-hucool.lihua@xxxxxxxxxx/ Fixes: 1f6d3a8f5e39 ("kprobes: Add a test case for stacktrace from kretprobe handler") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Li Hua <hucool.lihua@xxxxxxxxxx> Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- lib/Kconfig.debug | 1 + 1 file changed, 1 insertion(+) --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2092,6 +2092,7 @@ config TEST_MIN_HEAP config TEST_SORT tristate "Array-based sort test" if !KUNIT_ALL_TESTS depends on KUNIT + select STACKTRACE if ARCH_CORRECT_STACKTRACE_ON_KRETPROBE default KUNIT_ALL_TESTS help This option enables the self-test function of 'sort()' at boot, Patches currently in stable-queue which might be from hucool.lihua@xxxxxxxxxx are queue-6.1/test_kprobes-fix-implicit-declaration-error-of-test_kprobes.patch