============================= WARNING: suspicious RCU usage 4.13.0-rc6-next-20170825+ #9 Not tainted ----------------------------- ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 6 locks held by syz-executor4/3063: #0: (&dup_mmap_sem){.+.+}, at: [] dup_mmap kernel/fork.c:603 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] dup_mm kernel/fork.c:1171 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] copy_mm+0x3c6/0x1310 kernel/fork.c:1225 #1: (&mm->mmap_sem){++++}, at: [] dup_mmap kernel/fork.c:604 [inline] #1: (&mm->mmap_sem){++++}, at: [] dup_mm kernel/fork.c:1171 [inline] #1: (&mm->mmap_sem){++++}, at: [] copy_mm+0x3e2/0x1310 kernel/fork.c:1225 #2: (&mm->mmap_sem/1){+.+.}, at: [] dup_mmap kernel/fork.c:613 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [] dup_mm kernel/fork.c:1171 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [] copy_mm+0x43f/0x1310 kernel/fork.c:1225 #3: (rcu_read_lock){....}, at: [] arch_static_branch arch/x86/include/asm/jump_label.h:35 [inline] #3: (rcu_read_lock){....}, at: [] static_key_false include/linux/jump_label.h:141 [inline] #3: (rcu_read_lock){....}, at: [] netif_receive_skb_internal+0x93/0x5e0 net/core/dev.c:4498 #4: (rcu_read_lock){....}, at: [] __skb_pull include/linux/skbuff.h:2081 [inline] #4: (rcu_read_lock){....}, at: [] ip_local_deliver_finish+0x179/0xba0 net/ipv4/ip_input.c:194 #5: (slock-AF_INET/1){+.-.}, at: [] tcp_v4_rcv+0x2312/0x2f20 net/ipv4/tcp_ipv4.c:1716 stack backtrace: CPU: 0 PID: 3063 Comm: syz-executor4 Not tainted 4.13.0-rc6-next-20170825+ #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4678 rcu_preempt_sleep_check include/linux/rcupdate.h:301 [inline] ___might_sleep+0x385/0x470 kernel/sched/core.c:5987 __might_sleep+0x95/0x190 kernel/sched/core.c:5975 down_write+0x67/0x120 kernel/locking/rwsem.c:52 i_mmap_lock_write include/linux/fs.h:467 [inline] dup_mmap kernel/fork.c:678 [inline] dup_mm kernel/fork.c:1171 [inline] copy_mm+0xbf7/0x1310 kernel/fork.c:1225 copy_process.part.35+0x1eae/0x4af0 kernel/fork.c:1727 copy_process kernel/fork.c:1540 [inline] _do_fork+0x1ef/0xfe0 kernel/fork.c:2019 SYSC_clone kernel/fork.c:2129 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2123 do_syscall_64+0x26c/0x8c0 arch/x86/entry/common.c:287 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x444d94 RSP: 002b:0000000000a5f9a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000444d94 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000a5fa00 R08: 0000000000000001 R09: 0000000001cb0940 R10: 0000000001cb0c10 R11: 0000000000000246 R12: 0000000000a5f9a0 R13: 0000000000a5f9c0 R14: 000000000000001c R15: 0000000000008d2d ====================================================== WARNING: possible circular locking dependency detected 4.13.0-rc6-next-20170825+ #9 Not tainted ------------------------------------------------------ kworker/2:3/3782 is trying to acquire lock: ((&(&ifa->dad_work)->work)){+.+.}, at: [] process_one_work+0xb2c/0x1be0 kernel/workqueue.c:2094 but now in release context of a crosslock acquired at the following: ((complete)&rcu.completion){+.+.}, at: [] __synchronize_srcu+0x1b5/0x250 kernel/rcu/srcutree.c:898 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 ((complete)&rcu.completion){+.+.}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 complete_acquire include/linux/completion.h:39 [inline] __wait_for_common kernel/sched/completion.c:108 [inline] wait_for_common kernel/sched/completion.c:122 [inline] wait_for_completion+0xc8/0x770 kernel/sched/completion.c:143 __synchronize_srcu+0x1b5/0x250 kernel/rcu/srcutree.c:898 synchronize_srcu_expedited kernel/rcu/srcutree.c:923 [inline] synchronize_srcu+0x1a3/0x560 kernel/rcu/srcutree.c:974 quarantine_remove_cache+0xd7/0xf0 mm/kasan/quarantine.c:327 kasan_cache_shrink+0x9/0x10 mm/kasan/kasan.c:380 kmem_cache_shrink+0x15/0x30 mm/slab_common.c:857 acpi_os_purge_cache+0x15/0x20 drivers/acpi/osl.c:1560 acpi_purge_cached_objects+0x38/0xc9 drivers/acpi/acpica/utxface.c:271 acpi_initialize_objects+0xc5/0x112 drivers/acpi/acpica/utxfinit.c:302 acpi_bus_init drivers/acpi/bus.c:1131 [inline] acpi_init+0x23c/0x8e6 drivers/acpi/bus.c:1220 do_one_initcall+0x9e/0x330 init/main.c:826 do_initcall_level init/main.c:892 [inline] do_initcalls init/main.c:900 [inline] do_basic_setup init/main.c:918 [inline] kernel_init_freeable+0x469/0x521 init/main.c:1066 kernel_init+0x13/0x172 init/main.c:993 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 -> #2 (cpu_hotplug_lock.rw_sem){++++}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:35 [inline] percpu_down_read include/linux/percpu-rwsem.h:58 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:218 get_online_cpus include/linux/cpu.h:126 [inline] flush_all_backlogs net/core/dev.c:4592 [inline] rollback_registered_many+0x587/0xe80 net/core/dev.c:7127 rollback_registered+0x1be/0x3c0 net/core/dev.c:7183 unregister_netdevice_queue+0x2e3/0x5d0 net/core/dev.c:8171 unregister_netdevice include/linux/netdevice.h:2428 [inline] __tun_detach+0x1020/0x1390 drivers/net/tun.c:576 tun_detach drivers/net/tun.c:587 [inline] tun_chr_close+0x44/0x60 drivers/net/tun.c:2595 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:246 task_work_run+0x199/0x270 kernel/task_work.c:112 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0xa52/0x1b40 kernel/exit.c:865 do_group_exit+0x149/0x400 kernel/exit.c:968 get_signal+0x7e8/0x17e0 kernel/signal.c:2334 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x42f/0x500 arch/x86/entry/common.c:266 entry_SYSCALL_64_fastpath+0xbc/0xbe -> #1 (rtnl_mutex){+.+.}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1870 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 addrconf_dad_work+0xbb/0xfc0 net/ipv6/addrconf.c:3890 process_one_work+0xbfd/0x1be0 kernel/workqueue.c:2098 worker_thread+0x223/0x1860 kernel/workqueue.c:2233 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 -> #0 ((&(&ifa->dad_work)->work)){+.+.}: process_one_work+0xba5/0x1be0 kernel/workqueue.c:2095 worker_thread+0x223/0x1860 kernel/workqueue.c:2233 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 0xffffffffffffffff other info that might help us debug this: Chain exists of: (&(&ifa->dad_work)->work) --> cpu_hotplug_lock.rw_sem --> (complete)&rcu.completion Possible unsafe locking scenario by crosslock: CPU0 CPU1 ---- ---- lock(cpu_hotplug_lock.rw_sem); lock((complete)&rcu.completion); lock((&(&ifa->dad_work)->work)); unlock((complete)&rcu.completion); *** DEADLOCK *** 3 locks held by kworker/2:3/3782: #0: ("events_power_efficient"){.+.+}, at: [] __write_once_size include/linux/compiler.h:305 [inline] #0: ("events_power_efficient"){.+.+}, at: [] atomic64_set arch/x86/include/asm/atomic64_64.h:33 [inline] #0: ("events_power_efficient"){.+.+}, at: [] atomic_long_set include/asm-generic/atomic-long.h:56 [inline] #0: ("events_power_efficient"){.+.+}, at: [] set_work_data kernel/workqueue.c:617 [inline] #0: ("events_power_efficient"){.+.+}, at: [] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ("events_power_efficient"){.+.+}, at: [] process_one_work+0xad4/0x1be0 kernel/workqueue.c:2090 #1: ((&(&sdp->work)->work)){+.+.}, at: [] process_one_work+0xb2c/0x1be0 kernel/workqueue.c:2094 #2: (&x->wait#5){....}, at: [] complete+0x18/0x80 kernel/sched/completion.c:34 stack backtrace: CPU: 2 PID: 3782 Comm: kworker/2:3 Not tainted 4.13.0-rc6-next-20170825+ #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: events_power_efficient srcu_invoke_callbacks Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_circular_bug+0x503/0x710 kernel/locking/lockdep.c:1259 check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 commit_xhlock kernel/locking/lockdep.c:5002 [inline] commit_xhlocks kernel/locking/lockdep.c:5046 [inline] lock_commit_crosslock+0xe73/0x1d10 kernel/locking/lockdep.c:5085 complete_release_commit include/linux/completion.h:49 [inline] complete+0x24/0x80 kernel/sched/completion.c:39 wakeme_after_rcu+0xd/0x10 kernel/rcu/update.c:376 srcu_invoke_callbacks+0x280/0x4d0 kernel/rcu/srcutree.c:1161 process_one_work+0xbfd/0x1be0 kernel/workqueue.c:2098 worker_thread+0x223/0x1860 kernel/workqueue.c:2233 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 TCP: request_sock_TCP: Possible SYN flooding on port 20024. Sending cookies. Check SNMP counters. device lo entered promiscuous mode kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008f kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008e kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008d kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008c kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008b kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008a kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000089 kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000088 kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000087 kvm [6073]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000086 kvm [6073]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [6073]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [6073]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000020 data 0x66c9000000061043 capability: warning: `syz-executor1' uses deprecated v2 capabilities in a way that may be insecure QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl net_ratelimit: 2 callbacks suppressed sock: sock_set_timeout: `syz-executor5' (pid 6142) tries to set negative timeout sctp: [Deprecated]: syz-executor6 (pid 6158) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor6 (pid 6158) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor6 (pid 6158) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor6 (pid 6161) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sock: sock_set_timeout: `syz-executor5' (pid 6142) tries to set negative timeout QAT: Invalid ioctl QAT: Invalid ioctl device syz2 entered promiscuous mode sctp: [Deprecated]: syz-executor1 (pid 6278) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device syz2 left promiscuous mode device syz2 entered promiscuous mode sctp: [Deprecated]: syz-executor1 (pid 6309) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6349 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=82 sclass=netlink_tcpdiag_socket pig=6396 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=82 sclass=netlink_tcpdiag_socket pig=6408 comm=syz-executor2 nla_parse: 20 callbacks suppressed netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6610 comm=syz-executor2 device lo left promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl device syz2 left promiscuous mode skbuff: bad partial csum: csum=65285/255 len=14 ALSA: seq fatal error: cannot create timer (-22) sctp: [Deprecated]: syz-executor7 (pid 6753) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor7 (pid 6753) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device syz5 entered promiscuous mode netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. QAT: Invalid ioctl TCP: request_sock_TCP: Possible SYN flooding on port 20028. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=0 sclass=netlink_audit_socket pig=7060 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=0 sclass=netlink_audit_socket pig=7069 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65535 sclass=netlink_xfrm_socket pig=7122 comm=syz-executor7 netlink: 24 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 60 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 4052 bytes leftover after parsing attributes in process `syz-executor7'. SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65535 sclass=netlink_xfrm_socket pig=7151 comm=syz-executor7 netlink: 24 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. device  entered promiscuous mode netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. device  left promiscuous mode kauditd_printk_skb: 10 callbacks suppressed audit: type=1326 audit(1503790811.985:1384): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7262 comm="syz-executor3" exe="/syz-executor3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 QAT: Invalid ioctl QAT: Invalid ioctl SELinux: failure in selinux_parse_skb(), unable to parse packet audit: type=1326 audit(1503790812.043:1385): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7262 comm="syz-executor3" exe="/syz-executor3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 audit: type=1326 audit(1503790812.239:1386): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7410 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x4000008f data 0x4000f1 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x4000008e data 0x4000f2 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x4000008d data 0x4000f3 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x4000008c data 0x4000f4 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x4000008b data 0x4000f5 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x4000008a data 0x4000f6 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x40000089 data 0x4000f7 kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x40000088 data 0x4000f8 TCP: request_sock_TCPv6: Possible SYN flooding on port 20005. Sending cookies. Check SNMP counters. kvm [7439]: vcpu0, guest rIP: 0x910f Hyper-V uhandled wrmsr: 0x40000020 data 0x400160 audit: type=1326 audit(1503790812.302:1387): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7410 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 [drm:drm_mode_legacy_fb_format] *ERROR* bad bpp, assuming x8r8g8b8 pixel format device lo entered promiscuous mode [drm:drm_mode_legacy_fb_format] *ERROR* bad bpp, assuming x8r8g8b8 pixel format SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7525 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7525 comm=syz-executor1 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 kvm: pic: non byte read kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: non byte write kvm: pic: level sensitive irq not supported kvm: pic: non byte write kvm: pic: level sensitive irq not supported kvm: pic: single mode not supported kvm: pic: single mode not supported kvm: pic: level sensitive irq not supported kvm: pic: single mode not supported kvm: pic: level sensitive irq not supported kvm: pic: non byte read kvm: pic: level sensitive irq not supported kvm: pic: level sensitive irq not supported kvm: pic: single mode not supported kvm: pic: single mode not supported kvm: pic: level sensitive irq not supported PF_BRIDGE: RTM_NEWNEIGH with invalid address kvm: pic: single mode not supported kvm: pic: level sensitive irq not supported sctp: [Deprecated]: syz-executor1 (pid 7704) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor1 (pid 7704) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead PF_BRIDGE: RTM_NEWNEIGH with invalid address sctp: [Deprecated]: syz-executor2 (pid 7737) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 7704) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor1 (pid 7704) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 7737) Use of int in max_burst socket option. Use struct sctp_assoc_value instead *** Guest State *** CR0: actual=0x0000000080000021, shadow=0x0000000080000001, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002060, shadow=0x0000000000002020, gh_mask=ffffffffffffe871 CR3 = 0x0000000000002000 PDPTR0 = 0x0000000011e57ed0 PDPTR1 = 0x0000000000000000 PDPTR2 = 0x0000000000000000 PDPTR3 = 0x0000000000000000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000f80 CS:RIP=0050:0000000000002810 CS: sel=0x0030, attr=0x0409b, limit=0x000fffff, base=0x0000000000000000 DS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 SS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 ES: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 FS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 GS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 GDTR: limit=0x000007ff, base=0x0000000000001000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 IDTR: limit=0x000001ff, base=0x0000000000003800 TR: sel=0x0009, attr=0x10000, limit=0x00006001, base=0x0000000000005000 EFER = 0x0000000000001800 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff88003d34f4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f74fcb20700 GSBase=ffff88006df00000 TRBase=ffff88006df23100 GDTBase=ffffffffff574000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=000000005ad7c000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 *** Control State *** PinBased=0000003f CPUBased=b6986dfe SecondaryExec=000000e2 EntryControls=0001d1ff ExitControls=00afefff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=80000003 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000001 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffdd45f3c084 EPT pointer = 0x000000003cd8201e Virtual processor ID = 0x0001 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl syz-executor4 (7859) used greatest stack depth: 15032 bytes left lo: Invalid MTU -494141437 requested, hw min 0 lo: Invalid MTU -494141437 requested, hw min 0 lo: Invalid MTU -494141437 requested, hw min 0 lo: Invalid MTU -494141437 requested, hw min 0 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 audit: type=1326 audit(1503790813.382:1388): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8120 comm="syz-executor0" exe="/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503790813.404:1389): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8120 comm="syz-executor0" exe="/syz-executor0" sig=31 arch=c000003e syscall=35 compat=0 ip=0x470501 code=0xffff0000 sctp: [Deprecated]: syz-executor1 (pid 8160) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 8186) Use of int in maxseg socket option. Use struct sctp_assoc_value instead mmap: syz-executor7 (8228): VmData 17285120 exceed data ulimit 4. Update limits or use boot option ignore_rlimit_data. sctp: [Deprecated]: syz-executor2 (pid 8264) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 8286) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1326 audit(1503790814.182:1390): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8327 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503790814.262:1391): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8327 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 TCP: request_sock_TCP: Possible SYN flooding on port 20016. Sending cookies. Check SNMP counters. sctp: [Deprecated]: syz-executor0 (pid 8650) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor0 (pid 8650) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead ALSA: seq fatal error: cannot create timer (-19) ALSA: seq fatal error: cannot create timer (-19) QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl selinux_nlmsg_perm: 3 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14606 sclass=netlink_route_socket pig=8842 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=55705 sclass=netlink_route_socket pig=8842 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14606 sclass=netlink_route_socket pig=8842 comm=syz-executor5 audit: type=1326 audit(1503790816.264:1392): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9019 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 QAT: Invalid ioctl kvm: MONITOR instruction emulated as NOP! QAT: Invalid ioctl semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant. The task syz-executor5 (9108) triggered the difference, watch for misbehavior. nla_parse: 14 callbacks suppressed netlink: 11 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. loop_reread_partitions: partition scan of loop0 (t?`JzP[ p>TK6C="L l!V #F-') failed (rc=-13) audit: type=1326 audit(1503790816.730:1393): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9295 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 device syz3 entered promiscuous mode device syz3 left promiscuous mode device syz3 entered promiscuous mode device syz3 left promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl