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time/debug: Fix memory leak with using debugfs_lookup()

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[ Upstream commit 5b268d8aba ]

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic at
once.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230202151214.2306822-1-gregkh@linuxfoundation.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Greg Kroah-Hartman 2023-02-02 16:12:14 +01:00
parent 49aa499521
commit dc39fbd865
1 changed files with 1 additions and 1 deletions
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2
kernel/time/test_udelay.c
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@ -149,7 +149,7 @@ module_init(udelay_test_init);
static void __exit udelay_test_exit(void)
{
mutex_lock(&udelay_test_lock);
debugfs_remove(debugfs_lookup(DEBUGFS_FILENAME, NULL));
debugfs_lookup_and_remove(DEBUGFS_FILENAME, NULL);
mutex_unlock(&udelay_test_lock);
}