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selftests/damon: test non-context inputs to rm_contexts file

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There was a bug[1] that triggered by writing non-context DAMON debugfs
file names to the 'rm_contexts' DAMON debugfs file.  Add a selftest for
the bug to avoid it happen again.

[1] https://lore.kernel.org/damon/000000000000ede3ac05ec4abf8e@google.com/

Link: https://lkml.kernel.org/r/20221107165001.5717-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2022-11-07 16:50:01 +00:00 committed by Andrew Morton
parent d8dd5e979d
commit d7ec8f421a
2 changed files with 20 additions and 0 deletions
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1
tools/testing/selftests/damon/Makefile
View File

@ -7,6 +7,7 @@ TEST_FILES = _chk_dependency.sh _debugfs_common.sh
TEST_PROGS = debugfs_attrs.sh debugfs_schemes.sh debugfs_target_ids.sh
TEST_PROGS += debugfs_empty_targets.sh debugfs_huge_count_read_write.sh
TEST_PROGS += debugfs_duplicate_context_creation.sh
TEST_PROGS += debugfs_rm_non_contexts.sh
TEST_PROGS += sysfs.sh
TEST_PROGS += reclaim.sh lru_sort.sh

19
tools/testing/selftests/damon/debugfs_rm_non_contexts.sh Normal file
View File

@ -0,0 +1,19 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
source _debugfs_common.sh
# Test putting non-ctx files/dirs to rm_contexts file
# ===================================================
dmesg -C
for file in "$DBGFS/"*
do
echo "$(basename "$f")" > "$DBGFS/rm_contexts"
if dmesg | grep -q BUG
then
dmesg
exit 1
fi
done