====================================================== WARNING: possible circular locking dependency detected 4.14.0+ #190 Not tainted ------------------------------------------------------ syz-executor1/13104 is trying to acquire lock: (&ctx->mutex){+.+.}, at: [] perf_event_ctx_lock_nested+0x21b/0x450 kernel/events/core.c:1249 but task is already holding 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 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (&pipe->mutex/1){+.+.}: 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 -> #7 (sb_writers){.+.+}: complete+0x18/0x80 kernel/sched/completion.c:35 -> #6 ((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 -> #5 (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 -> #4 (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 -> #3 (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 -> #2 (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 -> #1 (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 -> #0 (&ctx->mutex){+.+.}: 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 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 other info that might help us debug this: Chain exists of: &ctx->mutex --> sb_writers --> &pipe->mutex/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&pipe->mutex/1); lock(sb_writers); lock(&pipe->mutex/1); lock(&ctx->mutex); *** DEADLOCK *** 1 lock held by syz-executor1/13104: #0: (&pipe->mutex/1){+.+.}, at: [] pipe_lock_nested fs/pipe.c:67 [inline] #0: (&pipe->mutex/1){+.+.}, at: [] pipe_lock+0x56/0x70 fs/pipe.c:75 stack backtrace: CPU: 1 PID: 13104 Comm: syz-executor1 Not tainted 4.14.0+ #190 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 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 RIP: 0033:0x452879 RSP: 002b:00007fdd834b8be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000014 RSI: 0000000000000000 RDI: 0000000000000015 RBP: 0000000000000086 R08: 0000000100000001 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006efed8 R13: 00000000ffffffff R14: 00007fdd834b96d4 R15: 0000000000000000 sctp: [Deprecated]: syz-executor6 (pid 13108) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor6 (pid 13108) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead kauditd_printk_skb: 97 callbacks suppressed audit: type=1326 audit(1511359452.045:1956): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13157 comm="syz-executor5" exe="/root/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0xffff0000 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl device lo left promiscuous mode netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. sg_write: data in/out 262108/36 bytes for SCSI command 0x42-- guessing data in; program syz-executor2 not setting count and/or reply_len properly device lo entered promiscuous mode device lo left promiscuous mode sg_write: data in/out 262108/36 bytes for SCSI command 0x42-- guessing data in; program syz-executor2 not setting count and/or reply_len properly netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. autofs4:pid:13275:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(0.0), cmd(0x0000937e) autofs4:pid:13275:validate_dev_ioctl: invalid device control module version supplied for cmd(0x0000937e) netlink: 14 bytes leftover after parsing attributes in process `syz-executor3'. autofs4:pid:13275:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(0.0), cmd(0x0000937e) autofs4:pid:13275:validate_dev_ioctl: invalid device control module version supplied for cmd(0x0000937e) netlink: 14 bytes leftover after parsing attributes in process `syz-executor3'. audit: type=1326 audit(1511359452.714:1957): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511359452.714:1958): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1959): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1960): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=228 compat=0 ip=0x45561a code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1961): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1962): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40cbb1 code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1963): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1964): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1511359452.715:1965): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=13302 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 device syz1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): syz1: link becomes ready QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18176 sclass=netlink_route_socket pig=13531 comm=syz-executor5 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18176 sclass=netlink_route_socket pig=13560 comm=syz-executor5 device syz1 left promiscuous mode device lo left promiscuous mode 9pnet_virtio: no channels available for device ./file0/file0 9pnet_virtio: no channels available for device ./file0/file0 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl RDS: rds_bind could not find a transport for 172.20.3.187, load rds_tcp or rds_rdma? QAT: Invalid ioctl RDS: rds_bind could not find a transport for 172.20.3.187, load rds_tcp or rds_rdma? do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3 sclass=netlink_route_socket pig=13752 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13752 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pig=13752 comm=syz-executor4 do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3 sclass=netlink_route_socket pig=13752 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13752 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pig=13752 comm=syz-executor4 nla_parse: 4 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl kvm [13965]: vcpu1, guest rIP: 0x0 Hyper-V uhandled wrmsr: 0x40000087 data 0x10000001000 could not allocate digest TFM handle tnepres Option 'Q9z̧h' to dns_resolver key: bad/missing value could not allocate digest TFM handle tnepres kvm [13965]: vcpu1, guest rIP: 0x0 Hyper-V uhandled wrmsr: 0x40000087 data 0x10000001000 RDS: rds_bind could not find a transport for 172.20.7.170, load rds_tcp or rds_rdma? netlink: 1 bytes leftover after parsing attributes in process `syz-executor6'. RDS: rds_bind could not find a transport for 172.20.7.170, load rds_tcp or rds_rdma? do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl encrypted_key: insufficient parameters specified QAT: Invalid ioctl encrypted_key: insufficient parameters specified QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl handle_userfault: 303 callbacks suppressed FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 14239 Comm: syz-executor1 Not tainted 4.14.0+ #190 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:ffff8801c13a7928 EFLAGS: 00010246 RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff82505391 RDX: 00000000000000c0 RSI: ffffc900020c8000 RDI: ffff8801c13a7d28 RBP: ffff8801c13a7a08 R08: 1ffff10038991c1a R09: 1ffff10038274f1a R10: ffff8801d442e2c0 R11: ffff8801d442e2c0 R12: 1ffff10038274f28 R13: ffff8801c13a79e0 R14: 0000000000000000 R15: ffff8801c13a7d20 generic_perform_write+0x200/0x600 mm/filemap.c:3129 __generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3264 generic_file_write_iter+0x399/0x7a0 mm/filemap.c:3292 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:482 vfs_write+0x18f/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:00007fdd834b8be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000014 RBP: 00000000000002ed R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f16d8 R13: 00000000ffffffff R14: 00007fdd834b96d4 R15: 0000000000000000 FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 1 PID: 14250 Comm: syz-executor1 Not tainted 4.14.0+ #190 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:ffff8801d16ff928 EFLAGS: 00010246 RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff82505391 RDX: 00000000000000a4 RSI: ffffc90002149000 RDI: ffff8801d16ffd28 RBP: ffff8801d16ffa08 R08: 1ffff10038991c1a R09: 1ffff1003a2dff1a R10: 0000000000000000 R11: ffff8801d3468540 R12: 1ffff1003a2dff28 R13: ffff8801d16ff9e0 R14: 0000000000000000 R15: ffff8801d16ffd20 generic_perform_write+0x200/0x600 mm/filemap.c:3129 __generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3264 generic_file_write_iter+0x399/0x7a0 mm/filemap.c:3292 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:482 vfs_write+0x18f/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:00007fdd83497be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452879 RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000014 RBP: 0000000000a6f880 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007fdd834989c0 R15: 000000000000000b QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl irq bypass consumer (token ffff8801d97e2840) registration fails: -16 sctp: [Deprecated]: syz-executor7 (pid 14463) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor7 (pid 14486) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead print_req_error: 20 callbacks suppressed print_req_error: I/O error, dev loop3, sector 0 buffer_io_error: 19 callbacks suppressed Buffer I/O error on dev loop3, logical block 0, lost async page write print_req_error: I/O error, dev loop3, sector 8 Buffer I/O error on dev loop3, logical block 1, lost async page write print_req_error: I/O error, dev loop3, sector 16 Buffer I/O error on dev loop3, logical block 2, lost async page write kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008f data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008e data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008d data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008c data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008b data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x4000008a data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x40000089 data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x40000088 data 0xe0000011 kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x40000020 data 0xe0000011 print_req_error: I/O error, dev loop3, sector 24 Buffer I/O error on dev loop3, logical block 3, lost async page write print_req_error: I/O error, dev loop3, sector 32 Buffer I/O error on dev loop3, logical block 4, lost async page write print_req_error: I/O error, dev loop3, sector 40 Buffer I/O error on dev loop3, logical block 5, lost async page write print_req_error: I/O error, dev loop3, sector 48 Buffer I/O error on dev loop3, logical block 6, lost async page write print_req_error: I/O error, dev loop3, sector 56 Buffer I/O error on dev loop3, logical block 7, lost async page write print_req_error: I/O error, dev loop3, sector 64 Buffer I/O error on dev loop3, logical block 8, lost async page write print_req_error: I/O error, dev loop3, sector 72 Buffer I/O error on dev loop3, logical block 9, lost async page write kvm [14548]: vcpu0, guest rIP: 0x9115 Hyper-V uhandled wrmsr: 0x40000020 data 0xe0000011 device gre0 entered promiscuous mode could not allocate digest TFM handle @ނMZBڛxQ\: 29¾:r FAULT_FLAG_ALLOW_RETRY missing 31 CPU: 0 PID: 14795 Comm: syz-executor6 Not tainted 4.14.0+ #190 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:3161 [inline] handle_pte_fault mm/memory.c:3934 [inline] __handle_mm_fault+0x2cc1/0x3ad0 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:copy_user_generic_unrolled+0xa0/0xc0 arch/x86/lib/copy_user_64.S:75 RSP: 0018:ffff8801c722f9a0 EFLAGS: 00010202 RAX: ffffed00399afe00 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffff8801ccd7f2d0 RDI: 0000000020001fb2 RBP: ffff8801c722f9d0 R08: ffffed00399afe5b R09: ffffed00399afe5b R10: 0000000000000001 R11: ffffed00399afe5a R12: 0000000020001fb2 R13: ffff8801ccd7f2d0 R14: 00007ffffffff000 R15: 0000000020001fb3 copy_to_user include/linux/uaccess.h:155 [inline] rfkill_fop_read+0x3e8/0x720 net/rfkill/core.c:1189 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 do_readv+0xfc/0x2a0 fs/read_write.c:992 SYSC_readv fs/read_write.c:1079 [inline] SyS_readv+0x27/0x30 fs/read_write.c:1076 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:00007f8aa6804be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000001 RSI: 0000000020013000 RDI: 0000000000000016 RBP: 000000000000038f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2608 R13: 00000000ffffffff R14: 00007f8aa68056d4 R15: 0000000000000000 could not allocate digest TFM handle @ނMZBڛxQ\: 29¾:r audit: type=1326 audit(1511359460.538:2269): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=14819 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x50000 audit: type=1326 audit(1511359460.560:2270): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=14819 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=16 compat=0 ip=0x452879 code=0x50000 audit: type=1326 audit(1511359460.560:2271): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=14819 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x50000 Empty option to dns_resolver key nla_parse: 12 callbacks suppressed netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. device gre0 entered promiscuous mode Empty option to dns_resolver key netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. audit: type=1326 audit(1511359460.560:2272): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=14819 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x50000