====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc1-next-20171129+ #55 Not tainted ------------------------------------------------------ syz-executor1/4270 is trying to acquire lock: (event_mutex){+.+.}, at: [] perf_trace_init+0x58/0xab0 kernel/trace/trace_event_perf.c:216 but task is already holding lock: (&ctx->mutex){+.+.}, at: [] perf_event_init_context kernel/events/core.c:10898 [inline] (&ctx->mutex){+.+.}, at: [] perf_event_init_task+0x25b/0x890 kernel/events/core.c:10973 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (&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 -> #7 (&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 -> #6 (sb_writers){.+.+}: finish_lock_switch kernel/sched/sched.h:1360 [inline] finish_task_switch+0x1aa/0x740 kernel/sched/core.c:2667 -> #5 ((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:517 -> #4 (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:976 start_kernel+0x6bc/0x74f init/main.c:698 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 (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:533 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 -> #2 (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:222 [inline] tracepoint_probe_register_prio+0x80d/0x9a0 kernel/tracepoint.c:282 tracepoint_probe_register+0x2a/0x40 kernel/tracepoint.c:303 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:9189 perf_init_event kernel/events/core.c:9227 [inline] perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9491 SYSC_perf_event_open+0x84e/0x2e00 kernel/events/core.c:9946 SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9832 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #1 (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:278 tracepoint_probe_register+0x2a/0x40 kernel/tracepoint.c:303 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:9189 perf_init_event kernel/events/core.c:9227 [inline] perf_event_alloc+0x1cc6/0x2b00 kernel/events/core.c:9491 SYSC_perf_event_open+0x84e/0x2e00 kernel/events/core.c:9946 SyS_perf_event_open+0x39/0x50 kernel/events/core.c:9832 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #0 (event_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_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:9189 perf_init_event kernel/events/core.c:9211 [inline] perf_event_alloc+0x1005/0x2b00 kernel/events/core.c:9491 inherit_event.isra.92+0x15b/0x920 kernel/events/core.c:10705 inherit_group kernel/events/core.c:10796 [inline] inherit_task_group.isra.94.part.95+0x73/0x240 kernel/events/core.c:10854 inherit_task_group kernel/events/core.c:10834 [inline] perf_event_init_context kernel/events/core.c:10905 [inline] perf_event_init_task+0x348/0x890 kernel/events/core.c:10973 copy_process.part.35+0x1748/0x4b30 kernel/fork.c:1776 copy_process kernel/fork.c:1615 [inline] _do_fork+0x1ef/0xf10 kernel/fork.c:2096 SYSC_clone kernel/fork.c:2203 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2197 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 return_from_SYSCALL_64+0x0/0x75 other info that might help us debug this: Chain exists of: event_mutex --> &pipe->mutex/1 --> &ctx->mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ctx->mutex); lock(&pipe->mutex/1); lock(&ctx->mutex); lock(event_mutex); *** DEADLOCK *** 2 locks held by syz-executor1/4270: #0: (&ctx->mutex){+.+.}, at: [] perf_event_init_context kernel/events/core.c:10898 [inline] #0: (&ctx->mutex){+.+.}, at: [] perf_event_init_task+0x25b/0x890 kernel/events/core.c:10973 #1: (&pmus_srcu){....}, at: [] perf_event_alloc+0xf55/0x2b00 kernel/events/core.c:9487 stack backtrace: CPU: 1 PID: 4270 Comm: syz-executor1 Not tainted 4.15.0-rc1-next-20171129+ #55 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_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:9189 perf_init_event kernel/events/core.c:9211 [inline] perf_event_alloc+0x1005/0x2b00 kernel/events/core.c:9491 inherit_event.isra.92+0x15b/0x920 kernel/events/core.c:10705 inherit_group kernel/events/core.c:10796 [inline] inherit_task_group.isra.94.part.95+0x73/0x240 kernel/events/core.c:10854 inherit_task_group kernel/events/core.c:10834 [inline] perf_event_init_context kernel/events/core.c:10905 [inline] perf_event_init_task+0x348/0x890 kernel/events/core.c:10973 copy_process.part.35+0x1748/0x4b30 kernel/fork.c:1776 copy_process kernel/fork.c:1615 [inline] _do_fork+0x1ef/0xf10 kernel/fork.c:2096 SYSC_clone kernel/fork.c:2203 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2197 do_syscall_64+0x26c/0x920 arch/x86/entry/common.c:285 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x455369 RSP: 002b:0000000000a6f748 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f790b89c700 RCX: 0000000000455369 RDX: 00007f790b89c9d0 RSI: 00007f790b89bdb0 RDI: 00000000003d0f00 RBP: 0000000000a6f880 R08: 00007f790b89c700 R09: 00007f790b89c700 R10: 00007f790b89c9d0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007f790b89c9c0 R15: 0000000000000014 rfkill: input handler disabled rfkill: input handler enabled device lo entered promiscuous mode encrypted_key: insufficient parameters specified encrypted_key: insufficient parameters specified device gre0 entered promiscuous mode print_req_error: I/O error, dev loop0, sector 4 print_req_error: I/O error, dev loop0, sector 4 binder: 4590:4594 transaction failed 29189/-22, size 0-32 line 2832 binder: 4590:4594 transaction failed 29189/-22, size 0-32 line 2832 kauditd_printk_skb: 427 callbacks suppressed audit: type=1326 audit(1511971831.715:438): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4761 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x4529d9 code=0xffff0000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4825 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4834 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4834 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4834 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4834 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4834 comm=syz-executor0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4888 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4888 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4888 comm=syz-executor0 CPU: 1 PID: 4882 Comm: syz-executor1 Not tainted 4.15.0-rc1-next-20171129+ #55 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4673 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 do_huge_pmd_anonymous_page+0xbbe/0x19e0 mm/huge_memory.c:692 create_huge_pmd mm/memory.c:3816 [inline] __handle_mm_fault+0x1bd6/0x3e60 mm/memory.c:4019 handle_mm_fault+0x38f/0x930 mm/memory.c:4085 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x4c/0x60 arch/x86/entry/entry_64.S:1230 RIP: 0033:0x401819 RSP: 002b:00007f790b8bcb90 EFLAGS: 00010246 RAX: 0000000020000000 RBX: 000000000000004a RCX: 0000000000000000 RDX: 209c2a81117b8a5f RSI: 0000000000000000 RDI: 00007f790b8bd608 RBP: 000000002078d000 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000004a R11: 0000000000000000 R12: 00000000006f54e8 R13: 0000000000000013 R14: 00007f790b8bd6d4 R15: ffffffffffffffff oom_reaper: reaped process 4882 (syz-executor1), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=4888 comm=syz-executor0 QAT: Invalid ioctl QAT: Invalid ioctl FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5697 Comm: syz-executor7 Not tainted 4.15.0-rc1-next-20171129+ #55 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4673 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 __do_huge_pmd_anonymous_page mm/huge_memory.c:567 [inline] do_huge_pmd_anonymous_page+0x554/0x19e0 mm/huge_memory.c:731 create_huge_pmd mm/memory.c:3816 [inline] __handle_mm_fault+0x1bd6/0x3e60 mm/memory.c:4019 handle_mm_fault+0x38f/0x930 mm/memory.c:4085 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1230 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 RSP: 0018:ffff8801c917fd88 EFLAGS: 00010202 RAX: ffffed003922ffda RBX: 0000000000000078 RCX: 0000000000000078 RDX: 0000000000000078 RSI: ffff8801c917fe58 RDI: 0000000020dcbfbc RBP: ffff8801c917fdb8 R08: ffffed003922ffda R09: ffffed003922ffda R10: 000000000000000f R11: ffffed003922ffd9 R12: 0000000020dcbfbc R13: ffff8801c917fe58 R14: 00007ffffffff000 R15: 0000000020dcc034 copy_to_user include/linux/uaccess.h:155 [inline] copy_msqid_to_user.constprop.9+0x22/0x30 ipc/msg.c:288 SYSC_msgctl+0x212/0x290 ipc/msg.c:557 SyS_msgctl+0x24/0x30 ipc/msg.c:528 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x4529d9 RSP: 002b:00007f7af2813c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000047 RAX: ffffffffffffffda RBX: 00007f7af2813aa0 RCX: 00000000004529d9 RDX: 0000000020dcbfbc RSI: 0000000000000002 RDI: 0000000000000000 RBP: 00007f7af2813a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b759b R13: 00007f7af2813bc8 R14: 00000000004b759b R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5810 Comm: syz-executor2 Not tainted 4.15.0-rc1-next-20171129+ #55 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 __sigqueue_alloc+0x329/0x660 kernel/signal.c:386 __send_signal+0x2e8/0x17a0 kernel/signal.c:1041 send_signal+0x4a/0xc0 kernel/signal.c:1107 specific_send_sig_info kernel/signal.c:1152 [inline] force_sig_info+0x242/0x340 kernel/signal.c:1204 force_sig_info_fault.constprop.32+0x289/0x450 arch/x86/mm/fault.c:223 __bad_area_nosemaphore+0x1d2/0x3e0 arch/x86/mm/fault.c:923 __bad_area+0x151/0x1f0 arch/x86/mm/fault.c:957 bad_area_access_error+0x166/0x240 arch/x86/mm/fault.c:996 __do_page_fault+0x3d1/0xc90 arch/x86/mm/fault.c:1409 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x4c/0x60 arch/x86/entry/entry_64.S:1230 RIP: 0033:0x44c5a0 RSP: 002b:00007f771dbdd788 EFLAGS: 00010206 RAX: 00007f771dbdd830 RBX: 0000000000758020 RCX: 0000000000000003 RDX: 0000000000000400 RSI: 0000000020fd7ff0 RDI: 00007f771dbdd830 RBP: 00000000000005a5 R08: 0000000000000400 R09: 0000000000000000 R10: 0000000020fd7ff3 R11: 0000000000000000 R12: 00000000006f5818 R13: 0000000000000014 R14: 00007f771dbde6d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5826 Comm: syz-executor2 Not tainted 4.15.0-rc1-next-20171129+ #55 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 getname_flags+0xcb/0x580 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:209 do_sys_open+0x2e7/0x6d0 fs/open.c:1053 SYSC_open fs/open.c:1077 [inline] SyS_open+0x2d/0x40 fs/open.c:1072 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x40cd11 RSP: 002b:00007f771dbdd780 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 000000000040cd11 RDX: 0000000000000000 RSI: 0000000072be4c3d RDI: 00007f771dbdd830 RBP: 00000000000005a5 R08: 00007f771dbdd790 R09: 00000000000005a5 R10: 0000000020fd7ff3 R11: 0000000000000293 R12: 00000000006f5818 R13: 0000000000000014 R14: 00007f771dbde6d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 5857 Comm: syz-executor2 Not tainted 4.15.0-rc1-next-20171129+ #55 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:2943 [inline] prepare_alloc_pages mm/page_alloc.c:4196 [inline] __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4235 __alloc_pages include/linux/gfp.h:456 [inline] __alloc_pages_node include/linux/gfp.h:469 [inline] kmem_getpages mm/slab.c:1414 [inline] cache_grow_begin+0x72/0x570 mm/slab.c:2672 cache_alloc_refill mm/slab.c:3039 [inline] ____cache_alloc mm/slab.c:3121 [inline] __do_cache_alloc mm/slab.c:3343 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x403/0x760 mm/slab.c:3546 getname_flags+0xcb/0x580 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:209 do_sys_open+0x2e7/0x6d0 fs/open.c:1053 SYSC_open fs/open.c:1077 [inline] SyS_open+0x2d/0x40 fs/open.c:1072 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x40cd11 RSP: 002b:00007f771dbdd780 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 000000000040cd11 RDX: 0000000000000000 RSI: 0000000072be4c3d RDI: 00007f771dbdd830 RBP: 00000000000005a5 R08: 00007f771dbdd790 R09: 00000000000005a5 R10: 0000000020fd7ff3 R11: 0000000000000293 R12: 00000000006f5818 R13: 0000000000000014 R14: 00007f771dbde6d4 R15: ffffffffffffffff