kernel/fail_function: 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: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20230202151633.2310897-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -163,10 +163,7 @@ static void fei_debugfs_add_attr(struct fei_attr *attr)
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static void fei_debugfs_remove_attr(struct fei_attr *attr)
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{
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struct dentry *dir;
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dir = debugfs_lookup(attr->kp.symbol_name, fei_debugfs_dir);
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debugfs_remove_recursive(dir);
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debugfs_lookup_and_remove(attr->kp.symbol_name, fei_debugfs_dir);
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}
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static int fei_kprobe_handler(struct kprobe *kp, struct pt_regs *regs)
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