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isdn: potential buffer overflows

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cs->ics.parm.setup.phone is a 32 character array.  In each of these
cases we're copying from a 35 character array into a 32 character array
so we should use strlcpy() instead of strcpy().

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2010-09-04 08:38:59 +00:00 committed by David S. Miller
parent ca1cef3a3a
commit 017d79ef00
1 changed files with 3 additions and 3 deletions
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6
drivers/isdn/divert/isdn_divert.c
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@ -77,7 +77,7 @@ static void deflect_timer_expire(ulong arg)
case DEFLECT_ALERT:
cs->ics.command = ISDN_CMD_REDIR; /* protocol */
strcpy(cs->ics.parm.setup.phone,cs->deflect_dest);
strlcpy(cs->ics.parm.setup.phone, cs->deflect_dest, sizeof(cs->ics.parm.setup.phone));
strcpy(cs->ics.parm.setup.eazmsn,"Testtext delayed");
divert_if.ll_cmd(&cs->ics);
spin_lock_irqsave(&divert_lock, flags);
@ -251,7 +251,7 @@ int deflect_extern_action(u_char cmd, ulong callid, char *to_nr)
case 2: /* redir */
del_timer(&cs->timer);
strcpy(cs->ics.parm.setup.phone, to_nr);
strlcpy(cs->ics.parm.setup.phone, to_nr, sizeof(cs->ics.parm.setup.phone));
strcpy(cs->ics.parm.setup.eazmsn, "Testtext manual");
ic.command = ISDN_CMD_REDIR;
if ((i = divert_if.ll_cmd(&ic)))
@ -480,7 +480,7 @@ static int isdn_divert_icall(isdn_ctrl *ic)
if (!cs->timer.expires)
{ strcpy(ic->parm.setup.eazmsn,"Testtext direct");
ic->parm.setup.screen = dv->rule.screen;
strcpy(ic->parm.setup.phone,dv->rule.to_nr);
strlcpy(ic->parm.setup.phone, dv->rule.to_nr, sizeof(ic->parm.setup.phone));
cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */
cs->timer.expires = jiffies + (HZ * AUTODEL_TIME);
retval = 5;