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: Devendra Naga <devendra.aaru@xxxxxxxxx>
---
drivers/staging/dgrp/dgrp_specproc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/dgrp/dgrp_specproc.c b/drivers/staging/dgrp/dgrp_specproc.c
index c214078..e09fc9c 100644
--- a/drivers/staging/dgrp/dgrp_specproc.c
+++ b/drivers/staging/dgrp/dgrp_specproc.c
@@ -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. */
--
1.7.10.4
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