/* * netsniff-ng - the packet sniffing beast * Copyright 2012 Markus Amend , Deutsche Flugsicherung GmbH * Subject to the GPL, version 2. * * http://www.ieee802.org/1/pages/802.1ad.html */ #include #include #include /* for ntohs() */ #include "proto.h" #include "protos.h" #include "dissector_eth.h" #include "built_in.h" #include "pkt_buff.h" struct QinQhdr { uint16_t TCI; uint16_t TPID; } __packed; static void QinQ_full(struct pkt_buff *pkt) { uint16_t tci; struct QinQhdr *QinQ = (struct QinQhdr *) pkt_pull(pkt, sizeof(*QinQ)); if (QinQ == NULL) return; tci = ntohs(QinQ->TCI); tprintf(" [ VLAN QinQ "); tprintf("Prio (%d), ", (tci & 0xE000) >> 13); tprintf("DEI (%d), ", (tci & 0x1000) >> 12); tprintf("ID (%d), ", (tci & 0x0FFF)); tprintf("Proto (0x%.4x)", ntohs(QinQ->TPID)); tprintf(" ]\n"); pkt_set_proto(pkt, ð_lay2, ntohs(QinQ->TPID)); } static void QinQ_less(struct pkt_buff *pkt) { uint16_t tci; struct QinQhdr *QinQ = (struct QinQhdr *) pkt_pull(pkt, sizeof(*QinQ)); if (QinQ == NULL) return; tci = ntohs(QinQ->TCI); tprintf(" VLAN%d", (tci & 0x0FFF)); pkt_set_proto(pkt, ð_lay2, ntohs(QinQ->TPID)); } struct protocol QinQ_ops = { .key = 0x88a8, .print_full = QinQ_full, .print_less = QinQ_less, }; back net-next plumbingsTobias Klauser
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authorAndrei Vagin <avagin@openvz.org>2017-01-04 19:28:14 -0800
committerEric W. Biederman <ebiederm@xmission.com>2017-01-10 13:34:56 +1300
commitadd7c65ca426b7a37184dd3d2172394e23d585d6 (patch)
tree28b08b519540041b06ed0ab0b1c005076b932e8e /net/l2tp
parent75422726b0f717d67db3283c2eb5bc14fa2619c5 (diff)
pid: fix lockdep deadlock warning due to ucount_lock
========================================================= [ INFO: possible irq lock inversion dependency detected ] 4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G W --------------------------------------------------------- swapper/1/0 just changed the state of lock: (&(&sighand->siglock)->rlock){-.....}, at: [<ffffffffbd0a1bc6>] __lock_task_sighand+0xb6/0x2c0 but this lock took another, HARDIRQ-unsafe lock in the past: (ucounts_lock){+.+...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&sighand->siglock)->rlock --> &(&tty->ctrl_lock)->rlock --> ucounts_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ucounts_lock); local_irq_disable(); lock(&(&sighand->siglock)->rlock); lock(&(&tty->ctrl_lock)->rlock); <Interrupt> lock(&(&sighand->siglock)->rlock); *** DEADLOCK *** This patch removes a dependency between rlock and ucount_lock. Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces") Cc: stable@vger.kernel.org Signed-off-by: Andrei Vagin <avagin@openvz.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net/l2tp')