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misc: vmw_balloon: fix memory leak with using debugfs_lookup()
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. Cc: Nadav Amit <namit@vmware.com> Cc: VMware PV-Drivers Reviewers <pv-drivers@vmware.com> Cc: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20230202141100.2291188-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1709,7 +1709,7 @@ static void __init vmballoon_debugfs_init(struct vmballoon *b)
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static void __exit vmballoon_debugfs_exit(struct vmballoon *b)
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static void __exit vmballoon_debugfs_exit(struct vmballoon *b)
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{
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{
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static_key_disable(&balloon_stat_enabled.key);
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static_key_disable(&balloon_stat_enabled.key);
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debugfs_remove(debugfs_lookup("vmmemctl", NULL));
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debugfs_lookup_and_remove("vmmemctl", NULL);
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kfree(b->stats);
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kfree(b->stats);
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b->stats = NULL;
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b->stats = NULL;
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}
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}
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