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selftests/livepatch: refine dmesg 'taints' in dmesg comparison

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The livepatch selftests currently grep on "taints" to filter out
"tainting kernel with TAINT_LIVEPATCH" messages which may be logged when
loading livepatch modules.

Further filter the log to drop "loading out-of-tree module taints
kernel" in the rare case the klp_test modules have been built
out-of-tree.

Look for the longer "taints kernel" or "tainting kernel" strings to
avoid inadvertent partial matching.

Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Reviewed-by: Yannick Cote <ycote@redhat.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20200618181040.21132-3-joe.lawrence@redhat.com
This commit is contained in:
Joe Lawrence 2020-06-18 14:10:39 -04:00 committed by Petr Mladek
parent 2eeb0d457d
commit c401088f0f
1 changed files with 2 additions and 1 deletions
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3
tools/testing/selftests/livepatch/functions.sh
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@ -277,7 +277,8 @@ function check_result {
# post-comparison sed filter.
result=$(dmesg | diff --changed-group-format='%>' --unchanged-group-format='' "$SAVED_DMESG" - | \
grep -v 'tainting' | grep -e 'livepatch:' -e 'test_klp' | \
grep -e 'livepatch:' -e 'test_klp' | \
grep -v '\(tainting\|taints\) kernel' | \
sed 's/^\[[ 0-9.]*\] //')
if [[ "$expect" == "$result" ]] ; then