From: Dan Carpenter <dan.carpenter@oracle.com>
To: netdev@vger.kernel.org, Karsten Keil <isdn@linux-pingi.de>
Cc: kernel-janitors@vger.kernel.org, isdn4linux@listserv.isdn4linux.de
Subject: [patch] isdnloop: use strlcpy() instead of strcpy()
Date: Thu, 14 Nov 2013 11:21:10 +0300 [thread overview]
Message-ID: <20131114082110.GD8150@elgon.mountain> (raw)
These strings come from a copy_from_user() and there is no way to be
sure they are NUL terminated.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c
index baf2686..02125e6 100644
--- a/drivers/isdn/isdnloop/isdnloop.c
+++ b/drivers/isdn/isdnloop/isdnloop.c
@@ -1083,8 +1083,10 @@ isdnloop_start(isdnloop_card *card, isdnloop_sdef *sdefp)
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
return -ENOMEM;
}
- for (i = 0; i < 3; i++)
- strcpy(card->s0num[i], sdef.num[i]);
+ for (i = 0; i < 3; i++) {
+ strlcpy(card->s0num[i], sdef.num[i],
+ sizeof(card->s0num[0]));
+ }
break;
case ISDN_PTYPE_1TR6:
if (isdnloop_fake(card, "DRV1.04TC-1TR6-CAPI-CNS-BASIS-29.11.95",
@@ -1097,7 +1099,7 @@ isdnloop_start(isdnloop_card *card, isdnloop_sdef *sdefp)
spin_unlock_irqrestore(&card->isdnloop_lock, flags);
return -ENOMEM;
}
- strcpy(card->s0num[0], sdef.num[0]);
+ strlcpy(card->s0num[0], sdef.num[0], sizeof(card->s0num[0]));
card->s0num[1][0] = '\0';
card->s0num[2][0] = '\0';
break;
next reply other threads:[~2013-11-14 8:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-14 8:21 Dan Carpenter [this message]
2013-11-14 21:50 ` [patch] isdnloop: use strlcpy() instead of strcpy() David Miller
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