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f08db42b1c
Commit ebb3f994dd ("mm/damon/dbgfs: fix 'struct pid' leaks in
'dbgfs_target_ids_write()'") fixes a pid leak bug in DAMON debugfs
interface, namely dbgfs_target_ids_write() function. Add a selftest for
the issue to prevent the problem from mistakenly recurring.
Link: https://lkml.kernel.org/r/20240207203134.69976-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
23 lines
527 B
Bash
23 lines
527 B
Bash
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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before=$(grep "^pid " /proc/slabinfo | awk '{print $2}')
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nr_leaks=$(./debugfs_target_ids_pid_leak 1000)
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expected_after_max=$((before + nr_leaks / 2))
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after=$(grep "^pid " /proc/slabinfo | awk '{print $2}')
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echo > /sys/kernel/debug/damon/target_ids
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echo "tried $nr_leaks pid leak"
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echo "number of active pid slabs: $before -> $after"
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echo "(up to $expected_after_max expected)"
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if [ $after -gt $expected_after_max ]
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then
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echo "maybe pids are leaking"
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exit 1
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else
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exit 0
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fi
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