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Date: Fri, 28 Sep 2007 16:42:42 -0700 From: Stephen Hemminger <shemminger@...ux-foundation.org> To: David Miller <davem@...emloft.net> Cc: cebbert@...hat.com, netdev@...r.kernel.org Subject: Re: Null dereference in socket.c On Fri, 28 Sep 2007 16:00:57 -0700 (PDT) David Miller <davem@...emloft.net> wrote: > From: Chuck Ebbert <cebbert@...hat.com> > Date: Fri, 28 Sep 2007 18:58:36 -0400 > > > After debugging an oops (https://bugzilla.redhat.com/attachment.cgi?id=209231) > > I find it happens here in socket.c::sock_ioctl() line 902: > > > > default: > > =============> err = sock->ops->ioctl(sock, cmd, arg); > > > > /* > > * If this ioctl is unknown try to hand it down > > * to the NIC driver. > > */ > > if (err == -ENOIOCTLCMD) > > err = dev_ioctl(cmd, argp); > > break; > > > > > > ioctl is NULL and the kernel jumps to address 0. Should we add a check > > for that? > > > > Bug report: > > https://bugzilla.redhat.com/show_bug.cgi?id=306801 > > Every protocol should provide a non-NULL ->ioctl() method, > find out which one isn't and fix it Auditing the net-2.6.24 tree all instances found by cscope are safe. -- Stephen Hemminger <shemminger@...ux-foundation.org> - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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