====================================================== WARNING: possible circular locking dependency detected 4.14.0-next-20171117+ #45 Not tainted ------------------------------------------------------ syz-executor7/10763 is trying to acquire lock: (console_lock){+.+.}, at: [] vcs_write+0x14d/0xca0 drivers/tty/vt/vc_screen.c:397 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: -> #3 (&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 -> #2 (sb_writers){.+.+}: rq_lock kernel/sched/sched.h:1766 [inline] __schedule+0x24e/0x2060 kernel/sched/core.c:3312 -> #1 ((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 vcs_make_sysfs+0x35/0x60 drivers/tty/vt/vc_screen.c:629 vc_allocate+0x4b7/0x6b0 drivers/tty/vt/vt.c:797 con_install+0x52/0x440 drivers/tty/vt/vt.c:2876 tty_driver_install_tty drivers/tty/tty_io.c:1215 [inline] tty_init_dev+0xf6/0x4a0 drivers/tty/tty_io.c:1315 tty_open_by_driver drivers/tty/tty_io.c:1942 [inline] tty_open+0x608/0xab0 drivers/tty/tty_io.c:1990 chrdev_open+0x257/0x730 fs/char_dev.c:417 do_dentry_open+0x682/0xd70 fs/open.c:752 vfs_open+0x107/0x230 fs/open.c:866 do_last fs/namei.c:3388 [inline] path_openat+0x1157/0x3530 fs/namei.c:3528 do_filp_open+0x25b/0x3b0 fs/namei.c:3563 do_sys_open+0x502/0x6d0 fs/open.c:1059 SYSC_open fs/open.c:1077 [inline] SyS_open+0x2d/0x40 fs/open.c:1072 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #0 (console_lock){+.+.}: 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 console_lock+0x4b/0x80 kernel/printk/printk.c:2047 vcs_write+0x14d/0xca0 drivers/tty/vt/vc_screen.c:397 __vfs_write+0xef/0x970 fs/read_write.c:480 __kernel_write+0xfe/0x350 fs/read_write.c:501 write_pipe_buf+0x175/0x220 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x328/0x730 fs/splice.c:626 splice_from_pipe+0x1e9/0x330 fs/splice.c:661 default_file_splice_write+0x40/0x90 fs/splice.c:809 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: console_lock --> sb_writers --> &pipe->mutex/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&pipe->mutex/1); lock(sb_writers); lock(&pipe->mutex/1); lock(console_lock); *** DEADLOCK *** 1 lock held by syz-executor7/10763: #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: 0 PID: 10763 Comm: syz-executor7 Not tainted 4.14.0-next-20171117+ #45 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 console_lock+0x4b/0x80 kernel/printk/printk.c:2047 vcs_write+0x14d/0xca0 drivers/tty/vt/vc_screen.c:397 __vfs_write+0xef/0x970 fs/read_write.c:480 __kernel_write+0xfe/0x350 fs/read_write.c:501 write_pipe_buf+0x175/0x220 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x328/0x730 fs/splice.c:626 splice_from_pipe+0x1e9/0x330 fs/splice.c:661 default_file_splice_write+0x40/0x90 fs/splice.c:809 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:00007f2609046be8 EFLAGS: 00000212 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000013 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 0000000000000086 R08: 00000000fffff5fc R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2620 R13: 00000000ffffffff R14: 00007f26090476d4 R15: 0000000000000000 rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write nla_parse: 3 callbacks suppressed netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor2'. print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write irq bypass consumer (token ffff8801d08e8840) registration fails: -16 print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 netlink: 13 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor0'. print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop0, sector 0 netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'. loop_reread_partitions: partition scan of loop0 (-\t@r9hxGQ:[il L*@R-Tr-x) failed (rc=-13) kauditd_printk_skb: 2845 callbacks suppressed audit: type=1326 audit(1510954443.052:10224): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor3'. loop_reread_partitions: partition scan of loop0 () failed (rc=-13) audit: type=1326 audit(1510954443.082:10225): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=16 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954443.082:10226): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954443.082:10227): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954443.093:10228): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=55 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954443.093:10229): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954443.093:10230): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 device  entered promiscuous mode audit: type=1326 audit(1510954443.093:10231): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=4 compat=0 ip=0x452879 code=0x7ffc0000 device  left promiscuous mode audit: type=1326 audit(1510954443.093:10232): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954443.093:10233): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=11751 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 buffer_io_error: 9 callbacks suppressed Buffer I/O error on dev loop0, logical block 0, lost async page write FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 12080 Comm: syz-executor7 Not tainted 4.14.0-next-20171117+ #45 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 audit_buffer_alloc kernel/audit.c:1625 [inline] audit_log_start+0x4cb/0xa10 kernel/audit.c:1743 __audit_seccomp+0x30/0x1c0 kernel/auditsc.c:2473 seccomp_log kernel/seccomp.c:592 [inline] __seccomp_filter+0xb53/0xe90 kernel/seccomp.c:726 __secure_computing+0xa6/0x330 kernel/seccomp.c:789 syscall_trace_enter+0x465/0x1100 arch/x86/entry/common.c:119 do_syscall_64+0x61e/0x920 arch/x86/entry/common.c:277 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452879 RSP: 002b:00007f2609046be8 EFLAGS: 00000212 ORIG_RAX: 000000000000009a RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000000 RSI: 0000000020d24000 RDI: 0000000000000000 RBP: 0000000000000391 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2638 R13: 0000000000000014 R14: 00007f26090476d4 R15: ffffffffffffffff netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 12093 Comm: syz-executor7 Not tainted 4.14.0-next-20171117+ #45 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 netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc_node mm/slab.c:3293 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3636 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:981 [inline] nlmsg_new include/net/netlink.h:511 [inline] audit_buffer_alloc kernel/audit.c:1629 [inline] audit_log_start+0x4ef/0xa10 kernel/audit.c:1743 __audit_seccomp+0x30/0x1c0 kernel/auditsc.c:2473 seccomp_log kernel/seccomp.c:592 [inline] __seccomp_filter+0xb53/0xe90 kernel/seccomp.c:726 __secure_computing+0xa6/0x330 kernel/seccomp.c:789 syscall_trace_enter+0x465/0x1100 arch/x86/entry/common.c:119 do_syscall_64+0x61e/0x920 arch/x86/entry/common.c:277 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452879 RSP: 002b:00007f2609046be8 EFLAGS: 00000212 ORIG_RAX: 000000000000009a RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000000 RSI: 0000000020d24000 RDI: 0000000000000000 RBP: 0000000000000391 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2638 R13: 0000000000000014 R14: 00007f26090476d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 12120 Comm: syz-executor7 Not tainted 4.14.0-next-20171117+ #45 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_node mm/slab.c:3293 [inline] kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3655 __do_kmalloc_node mm/slab.c:3675 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3690 __kmalloc_reserve.isra.41+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:981 [inline] nlmsg_new include/net/netlink.h:511 [inline] audit_buffer_alloc kernel/audit.c:1629 [inline] audit_log_start+0x4ef/0xa10 kernel/audit.c:1743 __audit_seccomp+0x30/0x1c0 kernel/auditsc.c:2473 seccomp_log kernel/seccomp.c:592 [inline] __seccomp_filter+0xb53/0xe90 kernel/seccomp.c:726 __secure_computing+0xa6/0x330 kernel/seccomp.c:789 syscall_trace_enter+0x465/0x1100 arch/x86/entry/common.c:119 do_syscall_64+0x61e/0x920 arch/x86/entry/common.c:277 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x452879 RSP: 002b:00007f2609046be8 EFLAGS: 00000212 ORIG_RAX: 000000000000009a RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000000000 RSI: 0000000020d24000 RDI: 0000000000000000 RBP: 0000000000000391 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f2638 R13: 0000000000000014 R14: 00007f26090476d4 R15: ffffffffffffffff netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. print_req_error: 7 callbacks suppressed print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. kvm [12149]: vcpu0, guest rIP: 0x30 Hyper-V uhandled wrmsr: 0x40000020 data 0x400 kvm [12149]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x400 device gre0 entered promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write *** Guest State *** CR0: actual=0x0000000080000031, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002051, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x000000000000fffa RIP = 0x0000000000000000 RFLAGS=0x00033000 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 DS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 SS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 ES: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 FS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 GS: sel=0x0000, attr=0x000f3, limit=0x0000ffff, base=0x0000000000000000 GDTR: limit=0x0000ffff, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000 IDTR: limit=0x0000ffff, base=0x0000000000000000 TR: sel=0x0000, attr=0x0008b, limit=0x00002088, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811bcac3 RSP = 0xffff8801934c74c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fcc724b2700 GSBase=ffff8801db500000 TRBase=ffff8801db523140 GDTBase=ffffffffff576000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=00000001d303d000 CR4=00000000001426e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff85107730 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b6a1edfa SecondaryExec=00000043 EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=ffffbfff PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000001 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffff544ed29c99 TPR Threshold = 0x00 EPT pointer = 0x00000001d962601e print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, lost async page write print_req_error: I/O error, dev loop0, sector 0 kauditd_printk_skb: 1298 callbacks suppressed audit: type=1326 audit(1510954448.149:11526): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=12813 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954448.149:11527): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=12813 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954448.149:11528): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=12813 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=16 compat=0 ip=0x452879 code=0x7ffc0000 audit: type=1326 audit(1510954448.149:11529): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=12813 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452879 code=0x7ffc0000