linux-kernel - [PATCH] selftests/lkdtm: Use /bin/sh not $SHELL

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Date:   Thu, 17 Jun 2021 16:10:27 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Shuah Khan <shuah@...nel.org>
Cc:     Kees Cook <keescook@...omium.org>, stable@...r.kernel.org,
        Guillaume Tucker <guillaume.tucker@...labora.com>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/lkdtm: Use /bin/sh not $SHELL

Some environments (e.g. kerneci.org) do not set $SHELL for their test
environment. There's no need to use $SHELL here anyway, so just replace
it with hard-coded /bin/sh instead. Without this, the LKDTM tests would
never actually run on kerneci.org.

Fixes: 46d1a0f03d66 ("selftests/lkdtm: Add tests for LKDTM targets")
Cc: stable@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 tools/testing/selftests/lkdtm/run.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/lkdtm/run.sh b/tools/testing/selftests/lkdtm/run.sh
index bb7a1775307b..968ff3cf5667 100755
--- a/tools/testing/selftests/lkdtm/run.sh
+++ b/tools/testing/selftests/lkdtm/run.sh
@@ -79,7 +79,7 @@ dmesg > "$DMESG"
 # Most shells yell about signals and we're expecting the "cat" process
 # to usually be killed by the kernel. So we have to run it in a sub-shell
 # and silence errors.
-($SHELL -c 'cat <(echo '"$test"') >'"$TRIGGER" 2>/dev/null) || true
+(/bin/sh -c 'cat <(echo '"$test"') >'"$TRIGGER" 2>/dev/null) || true
 
 # Record and dump the results
 dmesg | comm --nocheck-order -13 "$DMESG" - > "$LOG" || true
-- 
2.25.1