======================================================
WARNING: possible circular locking dependency detected
4.15.0-rc3+ #219 Not tainted
------------------------------------------------------
syz-executor4/16094 is trying to acquire lock:
 (&ctx->mutex){+.+.}, at: [<00000000756f6be9>] perf_event_ctx_lock_nested+0x21b/0x450 kernel/events/core.c:1249

but task is already holding lock:
 (&pipe->mutex/1){+.+.}, at: [<00000000a13d448e>] pipe_lock_nested fs/pipe.c:67 [inline]
 (&pipe->mutex/1){+.+.}, at: [<00000000a13d448e>] 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){.+.+}:
       rq_lock kernel/sched/sched.h:1766 [inline]
       __schedule+0x24e/0x2060 kernel/sched/core.c:3312
       schedule+0xf5/0x430 kernel/sched/core.c:3434
       devtmpfsd+0x420/0x4b0 drivers/base/devtmpfs.c:408
       kthread+0x37a/0x440 kernel/kthread.c:238
       ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441

-> #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:441

-> #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:2081
       pagecache_init+0x48/0x4f mm/filemap.c:977
       start_kernel+0x6bc/0x74f init/main.c:695
       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:7956
       perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9182
       perf_init_event kernel/events/core.c:9220 [inline]
       perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9484
       SYSC_perf_event_open+0x842/0x2f10 kernel/events/core.c:9939
       SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9825
       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:7956
       perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9182
       perf_init_event kernel/events/core.c:9220 [inline]
       perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9484
       SYSC_perf_event_open+0x842/0x2f10 kernel/events/core.c:9939
       SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9825
       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:7956
       perf_try_init_event+0xc9/0x1f0 kernel/events/core.c:9182
       perf_init_event kernel/events/core.c:9204 [inline]
       perf_event_alloc+0x1005/0x2b00 kernel/events/core.c:9484
       inherit_event.isra.92+0x15b/0x920 kernel/events/core.c:10698
       inherit_group kernel/events/core.c:10789 [inline]
       inherit_task_group.isra.94.part.95+0x73/0x240 kernel/events/core.c:10847
       inherit_task_group kernel/events/core.c:10827 [inline]
       perf_event_init_context kernel/events/core.c:10898 [inline]
       perf_event_init_task+0x348/0x890 kernel/events/core.c:10966
       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-executor4/16094:
 #0:  (&pipe->mutex/1){+.+.}, at: [<00000000a13d448e>] pipe_lock_nested fs/pipe.c:67 [inline]
 #0:  (&pipe->mutex/1){+.+.}, at: [<00000000a13d448e>] pipe_lock+0x56/0x70 fs/pipe.c:75

stack backtrace:
CPU: 1 PID: 16094 Comm: syz-executor4 Not tainted 4.15.0-rc3+ #219
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: 0033:0x452a39
RSP: 002b:00007f42b6d71c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39
RDX: 0000000000000017 RSI: 0000000000000000 RDI: 0000000000000018
RBP: 00000000000001f7 R08: 0000000100000001 R09: 000000000000000e
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f0fc8
R13: 00000000ffffffff R14: 00007f42b6d726d4 R15: 0000000000000000
netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'.
IPv6: NLM_F_REPLACE set, but no existing node found!
netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'.
IPv6: NLM_F_REPLACE set, but no existing node found!
netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'.
do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app
do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app
netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 'syz-executor7': attribute type 28 has an invalid length.
netlink: 'syz-executor7': attribute type 28 has an invalid length.
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
ICMPv6: NA: bb:bb:bb:bb:bb:02 advertised our address fe80::2aa on syz2!
ICMPv6: NA: bb:bb:bb:bb:bb:02 advertised our address fe80::2aa on syz2!
kauditd_printk_skb: 11 callbacks suppressed
audit: type=1400 audit(1513208295.435:2011): avc:  denied  { dyntransition } for  pid=16438 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0 tclass=process permissive=1
kvm [16426]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000074 data 0x9
device gre0 entered promiscuous mode
devpts: called with bogus options
devpts: called with bogus options
encrypted_key: master key parameter 'o��&
�?^�' is invalid
encrypted_key: master key parameter 'o��&
�?^�' is invalid
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
nla_parse: 13 callbacks suppressed
netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'.
binder: 16618:16624 transaction failed 29189/-22, size 64-48 line 2775
binder: 16618:16624 transaction failed 29189/-22, size 64-48 line 2775
netlink: 9 bytes leftover after parsing attributes in process `syz-executor4'.
lo: Invalid MTU -1075701634 requested, hw min 0
netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'.
lo: Invalid MTU -1075701634 requested, hw min 0
device gre0 entered promiscuous mode
netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'.
audit: type=1326 audit(1513208296.841:2012): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000
audit: type=1326 audit(1513208296.841:2013): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000
audit: type=1326 audit(1513208296.870:2014): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=324 compat=0 ip=0x452a39 code=0x7ffc0000
audit: type=1326 audit(1513208296.875:2015): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000
audit: type=1326 audit(1513208296.876:2016): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000
binder: 16803:16817 BC_FREE_BUFFER u0000020400000000 no match
audit: type=1326 audit(1513208296.876:2017): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=292 compat=0 ip=0x452a39 code=0x7ffc0000
audit: type=1326 audit(1513208296.876:2018): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000
binder: BINDER_SET_CONTEXT_MGR already set
binder: 16803:16813 ioctl 40046207 0 returned -16
binder: 16803:16805 BC_FREE_BUFFER u0000020400000000 no match
binder_alloc: 16803: binder_alloc_buf, no vma
binder: 16803:16805 transaction failed 29189/-3, size 0-0 line 2890
binder: undelivered TRANSACTION_ERROR: 29189
binder: release 16803:16817 transaction 79 out, still active
binder: undelivered TRANSACTION_COMPLETE
binder: send failed reply for transaction 79, target dead
audit: type=1326 audit(1513208296.876:2019): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x7ffc0000
audit: type=1326 audit(1513208296.876:2020): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=16803 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=9 compat=0 ip=0x452a39 code=0x7ffc0000
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
QAT: Invalid ioctl
QAT: Invalid ioctl
device eql entered promiscuous mode
could not allocate digest TFM handle hmac(����
could not allocate digest TFM handle hmac(����
binder: 17033:17035 BC_DEAD_BINDER_DONE 0000000000000000 not found
print_req_error: 103 callbacks suppressed
print_req_error: I/O error, dev loop6, sector 0
print_req_error: I/O error, dev loop6, sector 0
buffer_io_error: 100 callbacks suppressed
Buffer I/O error on dev loop6, logical block 0, async page read
binder: 17033:17035 BC_DEAD_BINDER_DONE 0000000000000000 not found
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
print_req_error: I/O error, dev loop6, sector 0
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
print_req_error: I/O error, dev loop6, sector 0
Buffer I/O error on dev loop6, logical block 0, async page read
Buffer I/O error on dev loop6, logical block 0, async page read
Buffer I/O error on dev loop6, logical block 0, async page read
netlink: 14 bytes leftover after parsing attributes in process `syz-executor3'.
netlink: 14 bytes leftover after parsing attributes in process `syz-executor3'.
device lo entered promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 11 bytes leftover after parsing attributes in process `syz-executor6'.
QAT: Invalid ioctl
netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'.
netlink: 'syz-executor6': attribute type 2 has an invalid length.
QAT: Invalid ioctl
netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'.
ALSA: seq fatal error: cannot create timer (-19)
device gre0 entered promiscuous mode
binder: 17627:17629 got reply transaction with no transaction stack
binder: 17627:17629 transaction failed 29201/-71, size 2-1144397507205 line 2690
binder: 17627:17629 got reply transaction with no transaction stack
binder: 17627:17629 transaction failed 29201/-71, size 2-1144397507205 line 2690
dccp_invalid_packet: pskb_may_pull failed
dccp_invalid_packet: pskb_may_pull failed
kauditd_printk_skb: 139 callbacks suppressed
audit: type=1400 audit(1513208300.750:2160): avc:  denied  { create } for  pid=17866 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1
audit: type=1326 audit(1513208300.795:2161): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17866 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0
audit: type=1326 audit(1513208300.796:2162): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17866 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452a39 code=0x0
audit: type=1326 audit(1513208300.809:2163): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=17866 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=35 compat=0 ip=0x47e0a1 code=0x0
nla_parse: 3 callbacks suppressed
netlink: 1 bytes leftover after parsing attributes in process `syz-executor6'.
binder: 17982:17991 got reply transaction with no transaction stack
binder: 17982:17991 transaction failed 29201/-71, size 32-8 line 2690
binder: 17982:17991 ioctl 404c534a 2000b000 returned -22
binder: 17982:17991 BC_DEAD_BINDER_DONE 0000000000000002 not found
binder: 17991 RLIMIT_NICE not set
binder: 17991 RLIMIT_NICE not set
binder: 17982:18001 ioctl c0306201 20007000 returned -14
binder: 17982:18001 got reply transaction with bad transaction stack, transaction 85 has target 17982:17991
binder: 17982:18001 transaction failed 29201/-71, size 24-16 line 2705
binder: release 17982:18001 transaction 85 out, still active
binder: undelivered TRANSACTION_COMPLETE
binder: send failed reply for transaction 86 to 17982:17991
binder: undelivered TRANSACTION_ERROR: 29201
binder: release 17982:17991 transaction 85 in, still active
binder: send failed reply for transaction 85, target dead
binder: undelivered TRANSACTION_COMPLETE
binder: undelivered TRANSACTION_ERROR: 29189
binder: 17982:18012 got reply transaction with no transaction stack
binder: 17982:18012 transaction failed 29201/-71, size 32-8 line 2690
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 17987 Comm: syz-executor3 Not tainted 4.15.0-rc3+ #219
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+0x353a/0x3e20 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:1094
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:ffff88018e2a7928 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff8250ae51
RDX: 00000000000000c3 RSI: ffffc900038da000 RDI: ffff88018e2a7d28
RBP: ffff88018e2a7a08 R08: 1ffff1003b20a502 R09: 1ffff10031c54f1a
R10: ffff8801d0e1c080 R11: 0000000000000000 R12: 1ffff10031c54f28
R13: ffff88018e2a79e0 R14: 0000000000000000 R15: ffff88018e2a7d20
 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: 0033:0x452a39
RSP: 002b:00007f887f386c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f887f387700 RCX: 0000000000452a39
RDX: 0000000000000030 RSI: 0000000020011fd2 RDI: 0000000000000016
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a6f7ff R14: 00007f887f3879c0 R15: 0000000000000000
binder: 17982:18012 ioctl 404c534a 2000b000 returned -22
binder: 17982:18001 BC_DEAD_BINDER_DONE 0000000000000002 not found
binder: 18001 RLIMIT_NICE not set
binder: 17982:18001 ioctl c0306201 20007000 returned -14
binder: 17982:18001 got new transaction with bad transaction stack, transaction 90 has target 17982:0
binder: 17982:18001 transaction failed 29201/-71, size 0-0 line 2802
binder: 17982:17991 got reply transaction with no transaction stack
binder: 17982:17991 transaction failed 29201/-71, size 24-16 line 2690
binder: undelivered TRANSACTION_ERROR: 29201
binder: release 17982:18001 transaction 90 out, still active
binder: undelivered TRANSACTION_COMPLETE
binder: undelivered TRANSACTION_ERROR: 29201
binder: send failed reply for transaction 90, target dead
binder: 18023:18024 Acquire 1 refcount change on invalid ref 4 ret -22
binder: 18023:18024 BC_ACQUIRE_DONE uffffffffffffffff no match
binder: 18023:18024 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 18023:18024 IncRefs 0 refcount change on invalid ref 0 ret -22
binder: 18024 RLIMIT_NICE not set
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 0 PID: 17999 Comm: syz-executor3 Not tainted 4.15.0-rc3+ #219
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+0x353a/0x3e20 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:1094
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:ffff8801af9d7928 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff8250ae51
RDX: 00000000000000ff RSI: ffffc900039dc000 RDI: ffff8801af9d7d28
RBP: ffff8801af9d7a08 R08: 0000000000000001 R09: 1ffff10035f3aedf
R10: ffff8801cceee280 R11: 0000000000000000 R12: 1ffff10035f3af28
R13: ffff8801af9d79e0 R14: 0000000000000000 R15: ffff8801af9d7d20
 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