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staging: dgrp: check for NULL pointer in (un)register_proc_table

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register_proc_table and unregister_proc_table didn't deal with the
possibility that the *table pointer could be NULL.  Check for this and
return if table is NULL.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bill Pemberton 2012-10-09 14:18:19 -04:00 committed by Greg Kroah-Hartman
parent 367ff459e5
commit d7c4660c12
1 changed files with 6 additions and 0 deletions
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6
drivers/staging/dgrp/dgrp_specproc.c
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@ -229,6 +229,9 @@ static void register_proc_table(struct dgrp_proc_entry *table,
int len;
mode_t mode;
if (table == NULL)
return;
for (; table->id; table++) {
/* Can't do anything without a proc name. */
if (!table->name)
@ -297,6 +300,9 @@ static void unregister_proc_table(struct dgrp_proc_entry *table,
struct proc_dir_entry *de;
struct nd_struct *tmp;
if (table == NULL)
return;
list_for_each_entry(tmp, &nd_struct_list, list) {
if ((table == dgrp_net_table) && (tmp->nd_net_de)) {
unregister_dgrp_device(tmp->nd_net_de);