LU-8066 obd: harden debugfs handling

[fs/lustre-release.git] / lustre / include / lprocfs_status.h

diff --git a/lustre/include/lprocfs_status.h b/lustre/include/lprocfs_status.h
index efb56e2..92b4cac 100644 (file)
--- a/lustre/include/lprocfs_status.h
+++ b/lustre/include/lprocfs_status.h
@@ -690,6 +690,8 @@ static const struct file_operations name##_fops = {                 \
 #define LDEBUGFS_SEQ_FOPS_RO_TYPE(name, type)                          \
        static int name##_##type##_seq_show(struct seq_file *m, void *v)\
        {                                                               \
+               if (!m->private)                                        \
+                       return -ENODEV;                                 \
                return lprocfs_##type##_seq_show(m, m->private);        \
        }                                                               \
        LDEBUGFS_SEQ_FOPS_RO(name##_##type)
@@ -697,6 +699,8 @@ static const struct file_operations name##_fops = {                 \
 #define LDEBUGFS_SEQ_FOPS_RW_TYPE(name, type)                          \
        static int name##_##type##_seq_show(struct seq_file *m, void *v)\
        {                                                               \
+               if (!m->private)                                        \
+                       return -ENODEV;                                 \
                return lprocfs_##type##_seq_show(m, m->private);        \
        }                                                               \
        static ssize_t name##_##type##_seq_write(struct file *file,     \
@@ -704,6 +708,9 @@ static const struct file_operations name##_fops = {                 \
                        loff_t *off)                                    \
        {                                                               \
                struct seq_file *seq = file->private_data;              \
+                                                                       \
+               if (!seq->private)                                      \
+                       return -ENODEV;                                 \
                return ldebugfs_##type##_seq_write(file, buffer, count, \
                                                   seq->private);       \
        }                                                               \