Linux kernel: net/irda/af_irda.c: irda_getsockopt() stack infoleak

[sohu0106]

Sometimes irda_getsockopt() doesn't initialize all members of list field of irda_device_list struct. ÂThis structure is then copied to
userland. ÂIt leads to leaking of contents of kernel stack memory. Â

2 Ânet/irda/af_irda.c
@@ -2248,6 +2248,8 @@ static int irda_getsockopt(struct socket *sock, int level, int optname,
Â			err = -EINVAL;
Â			goto out;
Â		}
+			
+		memset( &list, 0, sizeof(struct irda_device_list) );
Â
Â		/* Ask lmp for the current discovery log */
Â		discoveries = irlmp_get_discoveries(&list.len, self->mask.word,


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