IPVS: ftp: loaded support on port[0] = 21 BUG: MAX_LOCK_DEPTH too low! turning off the locking correctness validator. depth: 48 max: 48! 48 locks held by syz-executor6/5073: #0: 00000000094cb1b3 (rcu_read_lock_bh){....}, at: __dev_queue_xmit+0x328/0x3910 net/core/dev.c:3503 #1: 0000000008564076 (&(&sch->seqlock)->rlock){+...}, at: spin_trylock include/linux/spinlock.h:320 [inline] #1: 0000000008564076 (&(&sch->seqlock)->rlock){+...}, at: qdisc_run_begin include/net/sch_generic.h:124 [inline] #1: 0000000008564076 (&(&sch->seqlock)->rlock){+...}, at: qdisc_run include/net/pkt_sched.h:117 [inline] #1: 0000000008564076 (&(&sch->seqlock)->rlock){+...}, at: __dev_xmit_skb net/core/dev.c:3229 [inline] #1: 0000000008564076 (&(&sch->seqlock)->rlock){+...}, at: __dev_queue_xmit+0x13a3/0x3910 net/core/dev.c:3537 #2: 00000000e17d6b43 (dev->qdisc_running_key ?: &qdisc_running_key){+...}, at: dev_queue_xmit+0x17/0x20 net/core/dev.c:3602 #3: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #3: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #4: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #4: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #5: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #5: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #6: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #6: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #7: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #7: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #8: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #8: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #9: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #9: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #10: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #10: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #11: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #11: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #12: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #12: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #13: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #13: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #14: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #14: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #15: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #15: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #16: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #16: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #17: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #17: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #18: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #18: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #19: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #19: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #20: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #20: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #21: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #21: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #22: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #22: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #23: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #23: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #24: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #24: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #25: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #25: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #26: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #26: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #27: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #27: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #28: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #28: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #29: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #29: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #30: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #30: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #31: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #31: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #32: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #32: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #33: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #33: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #34: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #34: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #35: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #35: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #36: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #36: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #37: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #37: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #38: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #38: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #39: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #39: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #40: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #40: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #41: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #41: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #42: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #42: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #43: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #43: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #44: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #44: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #45: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #45: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #46: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #46: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 #47: 00000000f6376093 (rcu_read_lock){....}, at: __skb_pull include/linux/skbuff.h:2080 [inline] #47: 00000000f6376093 (rcu_read_lock){....}, at: skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787 INFO: lockdep is turned off. CPU: 0 PID: 5073 Comm: syz-executor6 Not tainted 4.18.0-rc3+ #8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 __lock_acquire+0x175d/0x5020 kernel/locking/lockdep.c:3453 lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 rcu_lock_acquire include/linux/rcupdate.h:245 [inline] rcu_read_lock include/linux/rcupdate.h:631 [inline] skb_mac_gso_segment+0x263/0x740 net/core/dev.c:2789 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111 skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792 __skb_gso_segment+0x3c3/0x880 net/core/dev.c:2865 skb_gso_segment include/linux/netdevice.h:4099 [inline] validate_xmit_skb+0x640/0xf30 net/core/dev.c:3104 validate_xmit_skb_list+0xbf/0x120 net/core/dev.c:3154 sch_direct_xmit+0x30e/0x1140 net/sched/sch_generic.c:312 qdisc_restart net/sched/sch_generic.c:390 [inline] __qdisc_run+0x619/0x19f0 net/sched/sch_generic.c:398 qdisc_run include/net/pkt_sched.h:118 [inline] __dev_xmit_skb net/core/dev.c:3229 [inline] __dev_queue_xmit+0x1419/0x3910 net/core/dev.c:3537 dev_queue_xmit+0x17/0x20 net/core/dev.c:3602 packet_snd net/packet/af_packet.c:2919 [inline] packet_sendmsg+0x428e/0x6130 net/packet/af_packet.c:2944 sock_sendmsg_nosec net/socket.c:641 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:651 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2125 __sys_sendmsg+0x11d/0x290 net/socket.c:2163 __do_sys_sendmsg net/socket.c:2172 [inline] __se_sys_sendmsg net/socket.c:2170 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2170 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455a79 Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f52dd25ac68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f52dd25b6d4 RCX: 0000000000455a79 RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000015 RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c1026 R14: 00000000004d1688 R15: 0000000000000001 ------------[ cut here ]------------ BUG: unable to handle kernel paging request at ffff8801cf460ac0 do_IRQ(): syz-executor6 has overflown the kernel stack (cur:ffff8801ced30000,sp:ffff8801ceba4e48,irq stk top-bottom:ffff8801dae00080-ffff8801dae08000,exception stk top-bottom:fffffe0000007080-fffffe0000011000,ip:write_comp_data+0xa/0x70) PGD b4df067 P4D b4df067 PUD 1d945f063 PMD 1ced25063 ================================================================== WARNING: CPU: 0 PID: 5073 at arch/x86/kernel/irq_64.c:63 stack_overflow_check arch/x86/kernel/irq_64.c:60 [inline] WARNING: CPU: 0 PID: 5073 at arch/x86/kernel/irq_64.c:63 handle_irq+0x1fb/0x2e7 arch/x86/kernel/irq_64.c:72