====================================================== WARNING: possible circular locking dependency detected 4.14.0+ #189 Not tainted ------------------------------------------------------ syz-executor2/9229 is trying to acquire lock: (&pipe->mutex/1){+.+.}, at: [] pipe_lock_nested fs/pipe.c:67 [inline] (&pipe->mutex/1){+.+.}, at: [] pipe_lock+0x56/0x70 fs/pipe.c:75 but task is already holding lock: (sb_writers){.+.+}, at: [] file_start_write include/linux/fs.h:2715 [inline] (sb_writers){.+.+}, at: [] do_splice fs/splice.c:1146 [inline] (sb_writers){.+.+}, at: [] SYSC_splice fs/splice.c:1402 [inline] (sb_writers){.+.+}, at: [] SyS_splice+0x1117/0x1630 fs/splice.c:1382 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (sb_writers){.+.+}: spin_lock include/linux/spinlock.h:315 [inline] dont_mount include/linux/dcache.h:355 [inline] vfs_unlink+0x2a2/0x480 fs/namei.c:3989 -> #7 ((completion)&req.done){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 complete_acquire include/linux/completion.h:40 [inline] __wait_for_common kernel/sched/completion.c:109 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0xcb/0x7b0 kernel/sched/completion.c:144 devtmpfs_create_node+0x32b/0x4a0 drivers/base/devtmpfs.c:115 device_add+0x120f/0x1640 drivers/base/core.c:1824 device_create_groups_vargs+0x1f3/0x250 drivers/base/core.c:2430 device_create_vargs drivers/base/core.c:2470 [inline] device_create+0xda/0x110 drivers/base/core.c:2506 msr_device_create+0x26/0x40 arch/x86/kernel/msr.c:188 cpuhp_invoke_callback+0x2ea/0x1d20 kernel/cpu.c:182 cpuhp_thread_fun+0x48e/0x7e0 kernel/cpu.c:571 smpboot_thread_fn+0x450/0x7c0 kernel/smpboot.c:164 kthread+0x37a/0x440 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:437 -> #6 (cpuhp_state-up){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 cpuhp_lock_acquire kernel/cpu.c:85 [inline] cpuhp_invoke_ap_callback kernel/cpu.c:605 [inline] cpuhp_issue_call+0x1e5/0x520 kernel/cpu.c:1495 __cpuhp_setup_state_cpuslocked+0x282/0x600 kernel/cpu.c:1642 __cpuhp_setup_state+0xb0/0x140 kernel/cpu.c:1671 cpuhp_setup_state include/linux/cpuhotplug.h:201 [inline] page_writeback_init+0x4d/0x71 mm/page-writeback.c:2083 pagecache_init+0x48/0x4f mm/filemap.c:977 start_kernel+0x6bc/0x74f init/main.c:690 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #5 (cpuhp_state_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 __cpuhp_setup_state_cpuslocked+0x5b/0x600 kernel/cpu.c:1617 __cpuhp_setup_state+0xb0/0x140 kernel/cpu.c:1671 cpuhp_setup_state_nocalls include/linux/cpuhotplug.h:229 [inline] kvm_guest_init+0x1f3/0x20f arch/x86/kernel/kvm.c:528 setup_arch+0x17e8/0x1a02 arch/x86/kernel/setup.c:1266 start_kernel+0xa5/0x74f init/main.c:530 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #4 (cpu_hotplug_lock.rw_sem){++++}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 static_key_slow_inc+0x9d/0x3c0 kernel/jump_label.c:123 tracepoint_add_func kernel/tracepoint.c:223 [inline] tracepoint_probe_register_prio+0x80d/0x9a0 kernel/tracepoint.c:283 tracepoint_probe_register+0x2a/0x40 kernel/tracepoint.c:304 trace_event_reg+0x167/0x320 kernel/trace/trace_events.c:305 perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] perf_trace_init+0x4ef/0xab0 kernel/trace/trace_event_perf.c:221 perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7952 perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9178 perf_init_event kernel/events/core.c:9216 [inline] perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9480 SYSC_perf_event_open+0x842/0x2f10 kernel/events/core.c:9935 SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9821 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #3 (tracepoints_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 tracepoint_probe_register_prio+0xa0/0x9a0 kernel/tracepoint.c:279 tracepoint_probe_register+0x2a/0x40 kernel/tracepoint.c:304 trace_event_reg+0x167/0x320 kernel/trace/trace_events.c:305 perf_trace_event_reg kernel/trace/trace_event_perf.c:122 [inline] perf_trace_event_init kernel/trace/trace_event_perf.c:197 [inline] perf_trace_init+0x4ef/0xab0 kernel/trace/trace_event_perf.c:221 perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7952 perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9178 perf_init_event kernel/events/core.c:9216 [inline] perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9480 SYSC_perf_event_open+0x842/0x2f10 kernel/events/core.c:9935 SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9821 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #2 (event_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_trace_init+0x58/0xab0 kernel/trace/trace_event_perf.c:216 perf_tp_event_init+0x7d/0xf0 kernel/events/core.c:7952 perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9178 perf_init_event kernel/events/core.c:9200 [inline] perf_event_alloc+0x1005/0x2b00 kernel/events/core.c:9480 inherit_event.isra.92+0x15b/0x920 kernel/events/core.c:10694 inherit_group kernel/events/core.c:10785 [inline] inherit_task_group.isra.94.part.95+0x73/0x240 kernel/events/core.c:10843 inherit_task_group kernel/events/core.c:10823 [inline] perf_event_init_context kernel/events/core.c:10894 [inline] perf_event_init_task+0x348/0x890 kernel/events/core.c:10962 copy_process.part.36+0x173b/0x4ae0 kernel/fork.c:1727 copy_process kernel/fork.c:1566 [inline] _do_fork+0x1ef/0xff0 kernel/fork.c:2045 SYSC_clone kernel/fork.c:2155 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2149 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 return_from_SYSCALL_64+0x0/0x75 -> #1 (&ctx->mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 perf_event_ctx_lock_nested+0x21b/0x450 kernel/events/core.c:1249 perf_event_ctx_lock kernel/events/core.c:1262 [inline] perf_read+0xb9/0x970 kernel/events/core.c:4507 do_loop_readv_writev fs/read_write.c:673 [inline] do_iter_read+0x3db/0x5b0 fs/read_write.c:897 vfs_readv+0x121/0x1c0 fs/read_write.c:959 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x508/0xae0 fs/splice.c:416 do_splice_to+0x110/0x170 fs/splice.c:880 do_splice fs/splice.c:1173 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x11a8/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #0 (&pipe->mutex/1){+.+.}: check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock+0x56/0x70 fs/pipe.c:75 iter_file_splice_write+0x264/0xf30 fs/splice.c:699 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 other info that might help us debug this: Chain exists of: &pipe->mutex/1 --> (completion)&req.done --> sb_writers Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers); lock((completion)&req.done); lock(sb_writers); lock(&pipe->mutex/1); *** DEADLOCK *** 1 lock held by syz-executor2/9229: #0: (sb_writers){.+.+}, at: [] file_start_write include/linux/fs.h:2715 [inline] #0: (sb_writers){.+.+}, at: [] do_splice fs/splice.c:1146 [inline] #0: (sb_writers){.+.+}, at: [] SYSC_splice fs/splice.c:1402 [inline] #0: (sb_writers){.+.+}, at: [] SyS_splice+0x1117/0x1630 fs/splice.c:1382 stack backtrace: CPU: 0 PID: 9229 Comm: syz-executor2 Not tainted 4.14.0+ #189 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug+0x42d/0x610 kernel/locking/lockdep.c:1271 check_prev_add+0x666/0x15f0 kernel/locking/lockdep.c:1914 check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock+0x56/0x70 fs/pipe.c:75 iter_file_splice_write+0x264/0xf30 fs/splice.c:699 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:00007f413ad45be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000016 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 0000000000000086 R08: 00000000fffffdf8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5278 R13: 00000000ffffffff R14: 00007f413ad466d4 R15: 0000000000000000 sock: sock_set_timeout: `syz-executor7' (pid 9285) tries to set negative timeout kvm [9288]: vcpu0, guest rIP: 0x9120 disabled perfctr wrmsr: 0xc1 data 0xffffffff sock: sock_set_timeout: `syz-executor7' (pid 9285) tries to set negative timeout kvm [9288]: vcpu0, guest rIP: 0x9122 disabled perfctr wrmsr: 0xc1 data 0xffffffff netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'. TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9340 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9340 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=198 sclass=netlink_route_socket pig=9340 comm=syz-executor6 device gre0 entered promiscuous mode netlink: 2 bytes leftover after parsing attributes in process `syz-executor1'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9350 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9355 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=198 sclass=netlink_route_socket pig=9366 comm=syz-executor6 kvm [9429]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008f picdev_read: 73 callbacks suppressed kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read 9pnet_virtio: no channels available for device ./file0 device gre0 entered promiscuous mode 9pnet_virtio: no channels available for device ./file0 QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9588 comm=syz-executor4 QAT: Invalid ioctl rfkill: input handler disabled rfkill: input handler enabled netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. SELinux: unrecognized netlink message: protocol=4 nlmsg_type=3 sclass=netlink_tcpdiag_socket pig=9692 comm=syz-executor7 NFS: bad mount option value specified: v; NFS: bad mount option value specified: v; device lo entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=9801 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4 sclass=netlink_route_socket pig=9801 comm=syz-executor4 sock: sock_set_timeout: `syz-executor1' (pid 9804) tries to set negative timeout sock: sock_set_timeout: `syz-executor1' (pid 9806) tries to set negative timeout Empty option to dns_resolver key nla_parse: 3 callbacks suppressed netlink: 5 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 7 bytes leftover after parsing attributes in process `syz-executor6'. Empty option to dns_resolver key PF_BRIDGE: br_mdb_parse() with non-bridge netlink: 5 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 7 bytes leftover after parsing attributes in process `syz-executor6'. PF_BRIDGE: br_mdb_parse() with non-bridge QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl kauditd_printk_skb: 156 callbacks suppressed audit: type=1326 audit(1511302938.098:1530): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9936 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0xffff0000 audit: type=1326 audit(1511302938.226:1531): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9936 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0xffff0000 netlink: 8 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. QAT: Invalid ioctl audit: type=1326 audit(1511302938.323:1532): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9968 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x0 audit: type=1326 audit(1511302938.453:1533): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=9968 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x0 QAT: Invalid ioctl RDS: rds_bind could not find a transport for 172.20.0.187, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 172.20.0.187, load rds_tcp or rds_rdma? audit: type=1326 audit(1511302938.790:1534): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10098 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302938.813:1535): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10098 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=41 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302938.813:1536): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10098 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302938.818:1537): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10098 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=55 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302938.818:1538): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10098 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302938.818:1539): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=10098 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 sctp: [Deprecated]: syz-executor1 (pid 10135) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 10147) Use of int in max_burst socket option. Use struct sctp_assoc_value instead QAT: Invalid ioctl QAT: Invalid ioctl device gre0 entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl pit: kvm: requested 838 ns i8254 timer period limited to 500000 ns pit: kvm: requested 838 ns i8254 timer period limited to 500000 ns Option ' selinux_nlmsg_perm: 7 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5 sclass=netlink_route_socket pig=10565 comm=syz-executor6 Option ' device gre0 entered promiscuous mode QAT: Invalid ioctl : renamed from sit0 device  entered promiscuous mode QAT: Invalid ioctl RDS: rds_bind could not find a transport for 224.0.0.2, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 224.0.0.2, load rds_tcp or rds_rdma? device lo left promiscuous mode sctp: [Deprecated]: syz-executor2 (pid 10701) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor2 (pid 10701) Use of int in maxseg socket option. Use struct sctp_assoc_value instead Started in network mode Own node address <96.2484.2183>, network identity 4711 device lo entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready sctp: [Deprecated]: syz-executor2 (pid 10701) Use of int in maxseg socket option. Use struct sctp_assoc_value instead device lo left promiscuous mode sctp: [Deprecated]: syz-executor2 (pid 10744) Use of int in maxseg socket option. Use struct sctp_assoc_value instead QAT: Invalid ioctl device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl sctp: [Deprecated]: syz-executor7 (pid 10834) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device gre0 entered promiscuous mode sctp: [Deprecated]: syz-executor7 (pid 10824) 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=10889 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4 sclass=netlink_route_socket pig=10889 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=57656 sclass=netlink_route_socket pig=10888 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=10900 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4 sclass=netlink_route_socket pig=10898 comm=syz-executor6 9pnet_virtio: no channels available for device ./file0/file0 9pnet_virtio: no channels available for device ./file0/file0 device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl dccp_v6_rcv: dropped packet with invalid checksum sock: process `syz-executor6' is using obsolete setsockopt SO_BSDCOMPAT nla_parse: 12 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor6'. handle_userfault: 383 callbacks suppressed FAULT_FLAG_ALLOW_RETRY missing 30 audit: type=1326 audit(1511302943.192:1911): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.192:1912): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=68 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.192:1913): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.193:1914): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=70 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.193:1915): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.193:1916): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=41 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.193:1917): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.193:1918): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=121 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511302943.193:1919): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11142 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 CPU: 1 PID: 11109 Comm: syz-executor4 Not tainted 4.14.0+ #189 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427 do_anonymous_page mm/memory.c:3121 [inline] handle_pte_fault mm/memory.c:3934 [inline] __handle_mm_fault+0x2e8c/0x3ad0 mm/memory.c:4060 handle_mm_fault+0x334/0x8d0 mm/memory.c:4097 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1088 RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline] RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421 RSP: 0018:ffff8801b243f928 EFLAGS: 00010246 RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff82505391 RDX: 00000000000000c0 RSI: ffffc90003775000 RDI: ffff8801b243fd28 RBP: ffff8801b243fa08 R08: 1ffff100389f216a R09: 1ffff10036487f1a R10: ffff8801c19a4340 R11: ffff8801c19a4340 R12: 1ffff10036487f28 R13: ffff8801b243f9e0 R14: 0000000000000000 R15: ffff8801b243fd20 generic_perform_write+0x200/0x600 mm/filemap.c:3129