6.8-stable review patch. If anyone has any objections, please let me know.
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From: SeongJae Park sj@kernel.org
[ Upstream commit 732b8815c079199d29b0426d9372bb098c63cdc7 ]
DAMON context staging method in _damon_sysfs.py is not checking the returned error from nr_schemes file read. Check it.
Link: https://lkml.kernel.org/r/20240503180318.72798-3-sj@kernel.org Fixes: f5f0e5a2bef9 ("selftests/damon/_damon_sysfs: implement kdamonds start function") Signed-off-by: SeongJae Park sj@kernel.org Cc: Jonathan Corbet corbet@lwn.net Cc: Shuah Khan shuah@kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/damon/_damon_sysfs.py | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py index e98cf4b6a4b76..f9fead3d0f018 100644 --- a/tools/testing/selftests/damon/_damon_sysfs.py +++ b/tools/testing/selftests/damon/_damon_sysfs.py @@ -241,6 +241,8 @@ class DamonCtx: nr_schemes_file = os.path.join( self.sysfs_dir(), 'schemes', 'nr_schemes') content, err = read_file(nr_schemes_file) + if err is not None: + return err if int(content) != len(self.schemes): err = write_file(nr_schemes_file, '%d' % len(self.schemes)) if err != None: