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selftests/lkdtm: Use "comm" instead of "diff" for dmesg

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Instead of full GNU diff (which smaller boot environments may not have),
use "comm" which is more available.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: linux-kselftest@vger.kernel.org
Fixes: f131d9edc2 ("selftests/lkdtm: Don't clear dmesg when running tests")
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200909211700.2399399-1-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook 2020-09-09 14:17:00 -07:00 committed by Greg Kroah-Hartman
parent 7f360bec37
commit d00451c811
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/lkdtm/run.sh
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@ -82,7 +82,7 @@ dmesg > "$DMESG"
($SHELL -c 'cat <(echo '"$test"') >'"$TRIGGER" 2>/dev/null) || true
# Record and dump the results
dmesg | diff --changed-group-format='%>' --unchanged-group-format='' "$DMESG" - > "$LOG" || true
dmesg | comm --nocheck-order -13 "$DMESG" - > "$LOG" || true
cat "$LOG"
# Check for expected output