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Commit 7b63c577 authored by Devendra Naga's avatar Devendra Naga Committed by Greg Kroah-Hartman
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staging: dgrp: check for a valid proc dir entry pointer 



while proc_create fails, the register_proc_table can do a derefernce of the
null pointer causing to oops the system, instead check for a valid pointer
at register and unregister

Signed-off-by: default avatarDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b194218d

drivers/staging/dgrp/dgrp_specproc.c

+3 −1
Original line number Diff line number Diff line
@@ -181,13 +181,13 @@ static struct dgrp_proc_entry dgrp_dpa_table[] = { 


void dgrp_unregister_proc(void)

{

	unregister_proc_table(dgrp_table, dgrp_proc_dir_entry);

	net_entry_pointer = NULL;

	mon_entry_pointer = NULL;

	dpa_entry_pointer = NULL;

	ports_entry_pointer = NULL;



	if (dgrp_proc_dir_entry) {

		unregister_proc_table(dgrp_table, dgrp_proc_dir_entry);

		remove_proc_entry(dgrp_proc_dir_entry->name,

				  dgrp_proc_dir_entry->parent);

		dgrp_proc_dir_entry = NULL;
@@ -231,6 +231,8 @@ static void register_proc_table(struct dgrp_proc_entry *table, 


	if (table == NULL)

		return;

	if (root == NULL)

		return;



	for (; table->id; table++) {

		/* Can't do anything without a proc name. */