Patch "kselftest/runner.sh: Propagate SIGTERM to runner child" has been added to the 5.15-stable tree

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

    kselftest/runner.sh: Propagate SIGTERM to runner child

to the 5.15-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:
     kselftest-runner.sh-propagate-sigterm-to-runner-chil.patch
and it can be found in the queue-5.15 subdirectory.

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



commit 7bc0b039ee9aa7ce7e13972975ab7de9b39f4081
Author: Björn Töpel <bjorn@xxxxxxxxxxxx>
Date:   Wed Jul 5 13:53:17 2023 +0200

    kselftest/runner.sh: Propagate SIGTERM to runner child
    
    [ Upstream commit 9616cb34b08ec86642b162eae75c5a7ca8debe3c ]
    
    Timeouts in kselftest are done using the "timeout" command with the
    "--foreground" option. Without the "foreground" option, it is not
    possible for a user to cancel the runner using SIGINT, because the
    signal is not propagated to timeout which is running in a different
    process group. The "forground" options places the timeout in the same
    process group as its parent, but only sends the SIGTERM (on timeout)
    signal to the forked process. Unfortunately, this does not play nice
    with all kselftests, e.g. "net:fcnal-test.sh", where the child
    processes will linger because timeout does not send SIGTERM to the
    group.
    
    Some users have noted these hangs [1].
    
    Fix this by nesting the timeout with an additional timeout without the
    foreground option.
    
    Link: https://lore.kernel.org/all/7650b2eb-0aee-a2b0-2e64-c9bc63210f67@xxxxxxxxxxxx/ # [1]
    Fixes: 651e0d881461 ("kselftest/runner: allow to properly deliver signals to tests")
    Signed-off-by: Björn Töpel <bjorn@xxxxxxxxxxxx>
    Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/testing/selftests/kselftest/runner.sh b/tools/testing/selftests/kselftest/runner.sh
index a9ba782d8ca0f..83616f0779a7e 100644
--- a/tools/testing/selftests/kselftest/runner.sh
+++ b/tools/testing/selftests/kselftest/runner.sh
@@ -33,7 +33,8 @@ tap_timeout()
 {
 	# Make sure tests will time out if utility is available.
 	if [ -x /usr/bin/timeout ] ; then
-		/usr/bin/timeout --foreground "$kselftest_timeout" $1
+		/usr/bin/timeout --foreground "$kselftest_timeout" \
+			/usr/bin/timeout "$kselftest_timeout" $1
 	else
 		$1
 	fi



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