The d_walk function in fs/dcache.c in the Linux kernel through 3.17.2 does not properly maintain the semantics of rename_lock, which allows local users to cause a denial of service (deadlock and system hang) via a crafted application.Referenceshttps://lkml.org/lkml/2014/10/26/116http://www.ubuntu.com/usn/USN-2515-1https://lkml.org/lkml/2014/10/26/101http://www.debian.org/security/2015/dsa-3170http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.htmlhttp://www.ubuntu.com/usn/USN-2492-1http://rhn.redhat.com/errata/RHSA-2015-1978.htmlhttp://www.openwall.com/lists/oss-security/2014/10/30/7http://secunia.com/advisories/62801http://rhn.redhat.com/errata/RHSA-2015-1976.htmlhttp://lists.opensuse.org/opensuse-security-announce/2015-01/msg00035.htmlhttps://lkml.org/lkml/2014/10/26/128http://www.securityfocus.com/bid/70854https://lkml.org/lkml/2014/10/25/179http://www.ubuntu.com/usn/USN-2518-1http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.htmlhttp://lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.htmlhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca5358ef75fc69fee5322a38a340f5739d997c10http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.htmlhttps://lkml.org/lkml/2014/10/26/129http://www.ubuntu.com/usn/USN-2493-1http://www.securitytracker.com/id/1034051https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=946e51f2bf37f1656916eb75bd0742ba33983c28https://lkml.org/lkml/2014/10/25/180http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00020.htmlhttp://www.ubuntu.com/usn/USN-2517-1https://lkml.org/lkml/2014/10/25/171http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.htmlhttp://www.ubuntu.com/usn/USN-2516-1https://bugzilla.redhat.com/show_bug.cgi?id=1159313https://support.f5.com/csp/article/K05211147
