Patch "selftests/resctrl: Ensure the benchmark commands fits to its array" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    selftests/resctrl: Ensure the benchmark commands fits to its array

to the 6.6-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:
     selftests-resctrl-ensure-the-benchmark-commands-fits.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 839c2e88e865ef28bccaac92e747eb5c0105ef42
Author: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Date:   Mon Sep 4 12:53:32 2023 +0300

    selftests/resctrl: Ensure the benchmark commands fits to its array
    
    [ Upstream commit 4a28c7665c2a1ac0400864eabb0c641e135f61aa ]
    
    Benchmark command is copied into an array in the stack. The array is
    BENCHMARK_ARGS items long but the command line could try to provide a
    longer command. Argument size is also fixed by BENCHMARK_ARG_SIZE (63
    bytes of space after fitting the terminating \0 character) and user
    could have inputted argument longer than that.
    
    Return error in case the benchmark command does not fit to the space
    allocated for it.
    
    Fixes: ecdbb911f22d ("selftests/resctrl: Add MBM test")
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
    Tested-by: Shaopeng Tan <tan.shaopeng@xxxxxxxxxxxxxx>
    Reviewed-by: Shaopeng Tan <tan.shaopeng@xxxxxxxxxxxxxx>
    Reviewed-by: "Wieczor-Retman, Maciej" <maciej.wieczor-retman@xxxxxxxxx>
    Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
    Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index d511daeb6851e..9e2bc8ba95f13 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -255,9 +255,14 @@ int main(int argc, char **argv)
 		return ksft_exit_skip("Not running as root. Skipping...\n");
 
 	if (has_ben) {
+		if (argc - ben_ind >= BENCHMARK_ARGS)
+			ksft_exit_fail_msg("Too long benchmark command.\n");
+
 		/* Extract benchmark command from command line. */
 		for (i = ben_ind; i < argc; i++) {
 			benchmark_cmd[i - ben_ind] = benchmark_cmd_area[i];
+			if (strlen(argv[i]) >= BENCHMARK_ARG_SIZE)
+				ksft_exit_fail_msg("Too long benchmark command argument.\n");
 			sprintf(benchmark_cmd[i - ben_ind], "%s", argv[i]);
 		}
 		benchmark_cmd[ben_count] = NULL;