INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?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 '10.128.0.19' (ECDSA) to the list of known hosts. 2018/04/25 21:45:30 parsed 1 programs 2018/04/25 21:45:30 executed programs: 0 syzkaller login: [ 122.930930] IPVS: ftp: loaded support on port[0] = 21 [ 122.973364] IPVS: ftp: loaded support on port[0] = 21 [ 123.028051] IPVS: ftp: loaded support on port[0] = 21 [ 123.066768] IPVS: ftp: loaded support on port[0] = 21 [ 123.209744] IPVS: ftp: loaded support on port[0] = 21 [ 123.358379] IPVS: ftp: loaded support on port[0] = 21 [ 123.449699] IPVS: ftp: loaded support on port[0] = 21 [ 123.637396] IPVS: ftp: loaded support on port[0] = 21 2018/04/25 21:45:35 executed programs: 208 2018/04/25 21:45:40 executed programs: 432 2018/04/25 21:45:45 executed programs: 657 2018/04/25 21:45:50 executed programs: 881 2018/04/25 21:45:55 executed programs: 1104 2018/04/25 21:46:00 executed programs: 1329 2018/04/25 21:46:05 executed programs: 1554 2018/04/25 21:46:10 executed programs: 1783 2018/04/25 21:46:16 executed programs: 2010 2018/04/25 21:46:21 executed programs: 2227 2018/04/25 21:46:26 executed programs: 2452 2018/04/25 21:46:31 executed programs: 2671 2018/04/25 21:46:36 executed programs: 2896 2018/04/25 21:46:41 executed programs: 3115 2018/04/25 21:46:46 executed programs: 3341 2018/04/25 21:46:51 executed programs: 3567 2018/04/25 21:46:56 executed programs: 3788 2018/04/25 21:47:01 executed programs: 4015 2018/04/25 21:47:06 executed programs: 4243 2018/04/25 21:47:11 executed programs: 4470 2018/04/25 21:47:16 executed programs: 4698 2018/04/25 21:47:21 executed programs: 4922 2018/04/25 21:47:26 executed programs: 5153 2018/04/25 21:47:31 executed programs: 5378 2018/04/25 21:47:36 executed programs: 5610 2018/04/25 21:47:41 executed programs: 5836 2018/04/25 21:47:46 executed programs: 6064 2018/04/25 21:47:51 executed programs: 6295 2018/04/25 21:47:56 executed programs: 6528 [ 269.194977] ================================================================== [ 269.202519] BUG: KMSAN: uninit-value in get_page_from_freelist+0x64c5/0xb600 [ 269.209701] CPU: 1 PID: 4075 Comm: syz-executor2 Not tainted 4.16.0+ #87 [ 269.216516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 269.225860] Call Trace: [ 269.228439] dump_stack+0x185/0x1d0 [ 269.232050] ? get_page_from_freelist+0x64c5/0xb600 [ 269.237050] kmsan_report+0x142/0x240 [ 269.240835] __msan_warning_32+0x6c/0xb0 [ 269.244882] get_page_from_freelist+0x64c5/0xb600 [ 269.249712] ? update_stack_state+0x885/0xa40 [ 269.254191] ? page_fault+0x45/0x50 [ 269.257807] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 269.263246] ? update_stack_state+0x885/0xa40 [ 269.267728] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 269.273075] ? is_bpf_text_address+0xb4/0x4b0 [ 269.277562] ? __is_insn_slot_addr+0x198/0x1c0 [ 269.282150] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 269.288399] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.293234] ? __next_zones_zonelist+0x15f/0x290 [ 269.297978] __alloc_pages_nodemask+0x789/0x5dc0 [ 269.302715] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.307543] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 269.312887] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.317713] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.322538] ? __msan_poison_alloca+0x15c/0x1d0 [ 269.327190] ? kmsan_set_origin+0x9e/0x160 [ 269.331415] ? __msan_poison_alloca+0x15c/0x1d0 [ 269.336158] alloc_pages_vma+0x1565/0x1800 [ 269.340382] do_huge_pmd_anonymous_page+0xf80/0x2520 [ 269.345474] handle_mm_fault+0x428f/0x7e50 [ 269.349692] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.354526] __do_page_fault+0xec4/0x1a10 [ 269.358666] ? page_fault+0x45/0x50 [ 269.362293] do_page_fault+0xd3/0x260 [ 269.366074] ? page_fault+0x2f/0x50 [ 269.369686] page_fault+0x45/0x50 [ 269.373116] RIP: 0033:0x43c781 [ 269.376286] RSP: 002b:0000000000a3e978 EFLAGS: 00010202 [ 269.381630] RAX: 0000000020000000 RBX: 0000000000000000 RCX: 0000000000000076 [ 269.388891] RDX: 0000000000000005 RSI: 0000000000730020 RDI: 0000000020000000 [ 269.396140] RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000023c2940 [ 269.403389] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 269.410639] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000041eaa [ 269.417898] [ 269.419505] Uninit was stored to memory at: [ 269.423809] kmsan_internal_chain_origin+0x12b/0x210 [ 269.428893] __msan_chain_origin+0x69/0xc0 [ 269.433111] __free_one_page+0x16cb/0x1800 [ 269.437327] __free_pages_ok+0x87f/0x16b0 [ 269.441455] free_compound_page+0x8e/0xc0 [ 269.445672] free_transhuge_page+0x3bc/0x470 [ 269.450059] release_pages+0x702/0x1670 [ 269.454450] free_pages_and_swap_cache+0x55b/0x580 [ 269.459366] unmap_page_range+0x3228/0x3be0 [ 269.463666] unmap_single_vma+0x45b/0x5f0 [ 269.467793] unmap_vmas+0x1f4/0x360 [ 269.471401] exit_mmap+0x3da/0x950 [ 269.474922] __mmput+0x16c/0x610 [ 269.478275] mmput+0xab/0xf0 [ 269.481274] exit_mm+0x6ed/0x7a0 [ 269.484649] do_exit+0xc01/0x38d0 [ 269.488086] do_group_exit+0x1a0/0x360 [ 269.491954] get_signal+0x1320/0x1f20 [ 269.495737] do_signal+0xb8/0x1c80 [ 269.499260] prepare_exit_to_usermode+0x271/0x3a0 [ 269.504084] syscall_return_slowpath+0xe9/0x700 [ 269.508733] do_syscall_64+0x36d/0x430 [ 269.512603] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 269.517765] Uninit was created at: [ 269.521286] kmsan_alloc_meta_for_pages+0x161/0x3a0 [ 269.526279] kmsan_alloc_page+0x82/0xe0 [ 269.530234] __alloc_pages_nodemask+0xf5b/0x5dc0 [ 269.534973] alloc_pages_current+0x6b5/0x970 [ 269.539363] __get_free_pages+0x2d/0xc0 [ 269.543318] unmap_page_range+0x26d2/0x3be0 [ 269.547622] unmap_single_vma+0x45b/0x5f0 [ 269.551752] unmap_vmas+0x1f4/0x360 [ 269.555361] exit_mmap+0x3da/0x950 [ 269.558884] __mmput+0x16c/0x610 [ 269.562231] mmput+0xab/0xf0 [ 269.565233] exit_mm+0x6ed/0x7a0 [ 269.568585] do_exit+0xc01/0x38d0 [ 269.572030] do_group_exit+0x1a0/0x360 [ 269.575902] get_signal+0x1320/0x1f20 [ 269.579682] do_signal+0xb8/0x1c80 [ 269.583201] prepare_exit_to_usermode+0x271/0x3a0 [ 269.588024] syscall_return_slowpath+0xe9/0x700 [ 269.592683] do_syscall_64+0x36d/0x430 [ 269.596555] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 269.601720] ================================================================== [ 269.609055] Disabling lock debugging due to kernel taint [ 269.614482] Kernel panic - not syncing: panic_on_warn set ... [ 269.614482] [ 269.621828] CPU: 1 PID: 4075 Comm: syz-executor2 Tainted: G B 4.16.0+ #87 [ 269.629946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 269.639279] Call Trace: [ 269.641856] dump_stack+0x185/0x1d0 [ 269.645468] panic+0x39d/0x940 [ 269.648663] ? get_page_from_freelist+0x64c5/0xb600 [ 269.653663] kmsan_report+0x238/0x240 [ 269.657447] __msan_warning_32+0x6c/0xb0 [ 269.661492] get_page_from_freelist+0x64c5/0xb600 [ 269.666318] ? update_stack_state+0x885/0xa40 [ 269.670799] ? page_fault+0x45/0x50 [ 269.674408] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 269.679849] ? update_stack_state+0x885/0xa40 [ 269.684330] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 269.689685] ? is_bpf_text_address+0xb4/0x4b0 [ 269.694176] ? __is_insn_slot_addr+0x198/0x1c0 [ 269.698750] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 269.704187] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.709022] ? __next_zones_zonelist+0x15f/0x290 [ 269.713765] __alloc_pages_nodemask+0x789/0x5dc0 [ 269.718511] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.723344] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 269.728699] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.733526] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.738350] ? __msan_poison_alloca+0x15c/0x1d0 [ 269.743003] ? kmsan_set_origin+0x9e/0x160 [ 269.747225] ? __msan_poison_alloca+0x15c/0x1d0 [ 269.751888] alloc_pages_vma+0x1565/0x1800 [ 269.756129] do_huge_pmd_anonymous_page+0xf80/0x2520 [ 269.761225] handle_mm_fault+0x428f/0x7e50 [ 269.765445] ? kmsan_set_origin_inline+0x6b/0x120 [ 269.770279] __do_page_fault+0xec4/0x1a10 [ 269.774416] ? page_fault+0x45/0x50 [ 269.778026] do_page_fault+0xd3/0x260 [ 269.781815] ? page_fault+0x2f/0x50 [ 269.785423] page_fault+0x45/0x50 [ 269.788859] RIP: 0033:0x43c781 [ 269.792034] RSP: 002b:0000000000a3e978 EFLAGS: 00010202 [ 269.797387] RAX: 0000000020000000 RBX: 0000000000000000 RCX: 0000000000000076 [ 269.804643] RDX: 0000000000000005 RSI: 0000000000730020 RDI: 0000000020000000 [ 269.811892] RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000023c2940 [ 269.819142] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 269.826392] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000041eaa [ 270.946959] Shutting down cpus with NMI [ 270.962560] Dumping ftrace buffer: [ 270.966094] (ftrace buffer empty) [ 270.969783] Kernel Offset: disabled [ 270.973393] Rebooting in 86400 seconds..