| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 25 Jan 2008 15:02:57 -0800 From: Stephen Hemminger <shemminger@...ux-foundation.org> To: "Alon Bar-Lev" <alon.barlev@...il.com> Cc: netdev@...r.kernel.org Subject: Re: iproute2 (addr flush) infinite loop when unprivileged users On Sat, 26 Jan 2008 01:00:34 +0200 "Alon Bar-Lev" <alon.barlev@...il.com> wrote: > Hello, > > When executing the following command using unprivileged users there is > an infinite loop... > /sbin/ip route flush dev eth1 > > Execution with -s produces: > *** Round 28153, deleting 2 entries *** > > *** Round 28154, deleting 2 entries *** > > *** Round 28155, deleting 2 entries *** > > *** Round 28156, deleting 2 entries *** > > *** Round 28157, deleting 2 entries *** > > *** Round 28158, deleting 2 entries *** > > *** Round 28159, deleting 2 entries *** > > I do not fully understand the sequence, but it may be kernel fault, as > it should have returned EPERM for this request stopping the netlink > request. > > Anyway... A simple solution is to store the filter.flushed and fail if > it keeps its value during loop iteration at > ip/ipaddress.c::ipaddr_list_or_flush(), but this is only a > workaround... > > Please CC as I am not in netdev list. > Thanks! > Alon. Non privileged users can't delete routes, but command keeps trying. The correct way to handle it is to teach flush loop to look at error code. -- Stephen Hemminger <stephen.hemminger@...tta.com> -- 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
Powered by blists - more mailing lists