selftests/exec: Convert remaining /bin/sh to /bin/bash

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.anjum@collabora.com>
Closes: https://lore.kernel.org/lkml/02c8bf8e-1934-44ab-a886-e065b37366a7@collabora.com/
Signed-off-by: Kees Cook <keescook@chromium.org>

diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
index a0b8688b0836941e0f8895f0477ea8da78a04f51..fb4472ddffd81bda3097619ad86d50d4cef6eb9e 100644 (file)
--- 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