As was intended with commit 17107429947b ("selftests/exec: Perform script
checks with /bin/bash"), convert the other instance of /bin/sh to
/bin/bash. It appears that at least Debian Bookworm's /bin/sh (dash)
does not conform to POSIX's "return 127 when script not found"
requirement.

Fixes: 17107429947b ("selftests/exec: Perform script checks with /bin/bash")
Reported-by: Muhammad Usama Anjum <usama.an...@collabora.com>
Closes: 
https://lore.kernel.org/lkml/02c8bf8e-1934-44ab-a886-e065b3736...@collabora.com/
Signed-off-by: Kees Cook <keesc...@chromium.org>
---
Cc: Muhammad Usama Anjum <usama.an...@collabora.com>
Cc: Eric Biederman <ebied...@xmission.com>
Cc: Shuah Khan <sh...@kernel.org>
Cc: "kernelci.org bot" <b...@kernelci.org>
Cc: Yang Yingliang <yangyingli...@huawei.com>
Cc: linux...@kvack.org
Cc: linux-kselftest@vger.kernel.org
---
 tools/testing/selftests/exec/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/exec/Makefile 
b/tools/testing/selftests/exec/Makefile
index a0b8688b0836..fb4472ddffd8 100644
--- a/tools/testing/selftests/exec/Makefile
+++ b/tools/testing/selftests/exec/Makefile
@@ -19,8 +19,8 @@ include ../lib.mk
 
 $(OUTPUT)/subdir:
        mkdir -p $@
-$(OUTPUT)/script:
-       echo '#!/bin/sh' > $@
+$(OUTPUT)/script: Makefile
+       echo '#!/bin/bash' > $@
        echo 'exit $$*' >> $@
        chmod +x $@
 $(OUTPUT)/execveat.symlink: $(OUTPUT)/execveat
-- 
2.34.1


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