drivers/char/applicom.c: fix information leak to userland
Structure st_loc is copied to userland with some fields unitialized. It
leads to leaking of stack memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index e7ba774..25373df 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -566,6 +566,7 @@
struct mailbox mailbox;
/* Got a packet for us */
+ memset(&st_loc, 0, sizeof(st_loc));
ret = do_ac_read(i, buf, &st_loc, &mailbox);
spin_unlock_irqrestore(&apbs[i].mutex, flags);
set_current_state(TASK_RUNNING);