[....] Starting enhanced syslogd: rsyslogd[ 9.711015] audit: type=1400 audit(1513301742.115:4): avc: denied { syslog } for pid=3173 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-android-49-kasan-gce-386-4,10.128.0.14' (ECDSA) to the list of known hosts. syzkaller login: [ 33.326814] audit: type=1400 audit(1513301765.735:5): avc: denied { sys_admin } for pid=3345 comm="syzkaller454544" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 33.344566] IPVS: Creating netns size=2536 id=1 [ 33.360652] IPVS: Creating netns size=2536 id=2 [ 33.370953] IPVS: Creating netns size=2536 id=3 executing program executing program executing program executing program [ 33.391164] IPVS: Creating netns size=2536 id=4 [ 33.401295] IPVS: Creating netns size=2536 id=5 [ 33.406234] audit: type=1400 audit(1513301765.815:6): avc: denied { sys_chroot } for pid=3347 comm="syzkaller454544" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 executing program executing program executing program executing program executing program executing program executing program [ 33.437515] IPVS: Creating netns size=2536 id=6 [ 33.458136] IPVS: Creating netns size=2536 id=7 [ 33.478841] IPVS: Creating netns size=2536 id=8 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.897426] kasan: CONFIG_KASAN_INLINE enabled [ 38.902033] BUG: spinlock bad magic on CPU#1, syzkaller454544/6485 [ 38.902040] lock: 0xffff8801c0394218, .magic: dead4eac, .owner: /-1, .owner_cpu: -1 [ 38.902044] CPU: 1 PID: 6485 Comm: syzkaller454544 Not tainted 4.9.69-g3f1d77c #4 [ 38.902046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.902054] ffff8801db307898 ffffffff81d90a29 ffff8801c0394218 ffff8801bec5e000 [ 38.902058] 0000000000000001 0000000000000001 0000000000000000 ffff8801db3078d8 [ 38.902063] ffffffff81245efd ffffe8ffffc03d00 ffff8801d48e2880 2000000002810000 [ 38.902064] Call Trace: [ 38.902073] [ 38.902073] [] dump_stack+0xc1/0x128 [ 38.902078] [] spin_dump+0x14d/0x280 [ 38.902082] [] do_raw_spin_lock+0x174/0x1e0 [ 38.902089] [] _raw_spin_lock_irqsave+0x56/0x70 [ 38.902093] [] ? __wake_up+0x1e/0x50 [ 38.902096] [] __wake_up+0x1e/0x50 [ 38.902101] [] sg_rq_end_io+0x5dc/0xbb0 [ 38.902105] [] ? sg_release+0x1e0/0x1e0 [ 38.902111] [] ? blk_account_io_done+0xb4/0x860 [ 38.902116] [] ? sg_free_table_chained+0x71/0x80 [ 38.902119] [] ? sg_release+0x1e0/0x1e0 [ 38.902124] [] __blk_mq_end_request+0x54/0xc0 [ 38.902129] [] scsi_end_request+0x135/0x5c0 [ 38.902133] [] scsi_io_completion+0x15de/0x1730 [ 38.902137] [] ? scsi_unblock_requests+0x50/0x50 [ 38.902141] [] ? __lock_is_held+0xa1/0xf0 [ 38.902145] [] scsi_finish_command+0x3b8/0x530 [ 38.902149] [] scsi_softirq_done+0x250/0x350 [ 38.902152] [] __blk_mq_complete_request+0x205/0x4b0 [ 38.902157] [] ? detach_buf+0x42e/0x5d0 [ 38.902161] [] blk_mq_complete_request+0x65/0x80 [ 38.902164] [] scsi_mq_done+0xce/0x320 [ 38.902170] [] virtscsi_complete_cmd+0x5cf/0x7f0 [ 38.902174] [] ? virtscsi_remove+0x140/0x140 [ 38.902178] [] virtscsi_vq_done+0xc9/0x170 [ 38.902182] [] ? virtscsi_target_destroy+0x50/0x50 [ 38.902187] [] ? try_to_wake_up+0xb7/0xee0 [ 38.902191] [] virtscsi_req_done+0xa7/0xd0 [ 38.902195] [] ? virtscsi_vq_done+0x170/0x170 [ 38.902198] [] vring_interrupt+0x109/0x150 [ 38.902201] [] ? vring_create_virtqueue+0x3f0/0x3f0 [ 38.902206] [] __handle_irq_event_percpu+0xef/0x800 [ 38.902210] [] handle_irq_event_percpu+0x74/0x150 [ 38.902214] [] ? __handle_irq_event_percpu+0x800/0x800 [ 38.902217] [] ? handle_irq_event+0x9f/0x140 [ 38.902223] [] ? kvm_clock_get_cycles+0x9/0x10 [ 38.902226] [] handle_irq_event+0xa7/0x140 [ 38.902231] [] handle_edge_irq+0x1fa/0x8e0 [ 38.902236] [] handle_irq+0x24e/0x3b0 [ 38.902241] [] ? check_preemption_disabled+0x3b/0x200 [ 38.902244] [] do_IRQ+0x89/0x1b0 [ 38.902248] [] common_interrupt+0x8c/0x8c [ 38.902253] [ 38.902253] [] ? preempt_schedule_irq+0x41/0x90 [ 38.902257] [] ? preempt_schedule_irq+0x3a/0x90 [ 38.902260] [] retint_kernel+0x1b/0x2d [ 38.902264] [] ? console_unlock+0x7a8/0xb20 [ 38.902267] [] vprintk_emit+0x4e2/0x750 [ 38.902270] [] vprintk+0x28/0x30 [ 38.902274] [] vprintk_default+0x1d/0x30 [ 38.902278] [] printk+0xb7/0xe2 [ 38.902282] [] ? load_image_and_restore+0xf9/0xf9 [ 38.902286] [] ? update_stack_state.constprop.5+0xca/0x150 [ 38.902290] [] kasan_die_handler+0x31/0x40 [ 38.902294] [] notifier_call_chain+0x90/0x1a0 [ 38.902298] [] atomic_notifier_call_chain+0x7b/0x140 [ 38.902302] [] ? __atomic_notifier_call_chain+0x150/0x150 [ 38.902306] [] notify_die+0xdf/0x160 [ 38.902310] [] ? atomic_notifier_call_chain+0x140/0x140 [ 38.902313] [] ? __free_pages+0x21/0x80 [ 38.902316] [] ? __free_pages+0x21/0x80 [ 38.902320] [] ? search_exception_tables+0x31/0x40 [ 38.902324] [] do_general_protection+0x2fc/0x3a0 [ 38.902327] [] general_protection+0x28/0x30 [ 38.902330] [] ? __free_pages+0x21/0x80 [ 38.902335] [] sg_remove_scat.isra.20+0x1c1/0x2d0 [ 38.902339] [] sg_finish_rem_req+0x2b5/0x340 [ 38.902342] [] sg_read+0xa1c/0x1440 [ 38.902346] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.902351] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 38.902355] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.902359] [] __vfs_read+0x103/0x670 [ 38.902363] [] ? default_llseek+0x290/0x290 [ 38.902367] [] ? fsnotify+0x86/0xf30 [ 38.902370] [] ? fsnotify+0xf30/0xf30 [ 38.902375] [] ? avc_policy_seqno+0x9/0x20 [ 38.902379] [] ? selinux_file_permission+0x82/0x460 [ 38.902384] [] ? security_file_permission+0x89/0x1e0 [ 38.902387] [] ? rw_verify_area+0xe5/0x2b0 [ 38.902390] [] vfs_read+0x11e/0x380 [ 38.902394] [] SyS_read+0xd9/0x1b0 [ 38.902398] [] ? vfs_copy_file_range+0x740/0x740 [ 38.902401] [] ? do_fast_syscall_32+0xcf/0x890 [ 38.902405] [] ? vfs_copy_file_range+0x740/0x740 [ 38.902408] [] do_fast_syscall_32+0x2f7/0x890 [ 38.902412] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.902415] [] entry_SYSENTER_compat+0x51/0x60 [ 38.933746] kasan: CONFIG_KASAN_INLINE enabled [ 38.933748] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.933753] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.933756] Dumping ftrace buffer: [ 38.933759] (ftrace buffer empty) [ 38.933761] Modules linked in: [ 38.933767] CPU: 0 PID: 6487 Comm: syzkaller454544 Not tainted 4.9.69-g3f1d77c #4 [ 38.933769] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.933772] task: ffff8801bec18000 task.stack: ffff8801bec78000 [ 38.933783] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 38.933785] RSP: 0018:ffff8801bec7faa0 EFLAGS: 00010a07 [ 38.933787] RAX: dffffc0000000000 RBX: dead4eac00000000 RCX: 1ffff10038072843 [ 38.933790] RDX: 1bd5a9d580000003 RSI: 0000000000000001 RDI: dead4eac0000001c [ 38.933792] RBP: ffff8801bec7fab0 R08: ffffed003803ec10 R09: ffff8801c01f6060 [ 38.933795] R10: 0000000000000005 R11: ffffed003803ec10 R12: 0000000000000004 [ 38.933797] R13: 0000000000000020 R14: ffff8801c0394200 R15: dffffc0000000000 [ 38.933800] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f6782b40 [ 38.933802] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 38.933804] CR2: 00000000f6f82ccc CR3: 00000001c00f5000 CR4: 00000000001406f0 [ 38.933808] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.933810] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.933811] Stack: [ 38.933817] 0000000000000000 ffff8801c0394358 ffff8801bec7fb10 ffffffff826600d1 [ 38.933822] ffff8801c0394370 ffffed003807286b ffffed003807286e ffff8801c0394368 [ 38.933827] dead4eac00000000 ffff8801c0394340 0000000000000000 0000000000000000 [ 38.933828] Call Trace: [ 38.933835] [] sg_remove_scat.isra.20+0x1c1/0x2d0 [ 38.933839] [] sg_finish_rem_req+0x2b5/0x340 [ 38.933844] [] sg_read+0xa1c/0x1440 [ 38.933848] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.933855] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 38.933859] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.933864] [] __vfs_read+0x103/0x670 [ 38.933868] [] ? default_llseek+0x290/0x290 [ 38.933874] [] ? fsnotify+0x86/0xf30 [ 38.933877] [] ? fsnotify+0xf30/0xf30 [ 38.933882] [] ? avc_policy_seqno+0x9/0x20 [ 38.933887] [] ? selinux_file_permission+0x82/0x460 [ 38.933892] [] ? security_file_permission+0x89/0x1e0 [ 38.933896] [] ? rw_verify_area+0xe5/0x2b0 [ 38.933899] [] vfs_read+0x11e/0x380 [ 38.933903] [] SyS_read+0xd9/0x1b0 [ 38.933907] [] ? vfs_copy_file_range+0x740/0x740 [ 38.933912] [] ? do_fast_syscall_32+0xcf/0x890 [ 38.933916] [] ? vfs_copy_file_range+0x740/0x740 [ 38.933919] [] do_fast_syscall_32+0x2f7/0x890 [ 38.933922] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.933927] [] entry_SYSENTER_compat+0x51/0x60 [ 38.933985] Code: ff 66 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [ 38.933989] RIP [] __free_pages+0x21/0x80 [ 38.933990] RSP [ 38.934010] ---[ end trace 5b357e9158b43c4a ]--- [ 38.934012] Kernel panic - not syncing: Fatal exception [ 38.935849] Dumping ftrace buffer: [ 38.935850] (ftrace buffer empty) [ 38.935852] Kernel Offset: disabled [ 39.828281] Rebooting in 86400 seconds..