[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.171744] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.975033] random: sshd: uninitialized urandom read (32 bytes read) [ 18.122429] random: sshd: uninitialized urandom read (32 bytes read) [ 18.646746] random: sshd: uninitialized urandom read (32 bytes read) [ 41.658498] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. [ 47.259275] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 47.363653] IPVS: Creating netns size=2536 id=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.396660] IPVS: Creating netns size=2536 id=2 executing program executing program executing program executing program executing program executing program executing program executing program [ 47.425019] IPVS: Creating netns size=2536 id=3 executing program executing program executing program executing program executing program executing program executing program [ 47.452781] IPVS: Creating netns size=2536 id=4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.473916] IPVS: Creating netns size=2536 id=5 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.514082] IPVS: Creating netns size=2536 id=6 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.560673] IPVS: Creating netns size=2536 id=7 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.603257] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.985899] BUG: unable to handle kernel paging request at ffffeafff9018020 [ 49.993287] IP: [] page_remove_rmap+0x37/0x6d0 [ 49.999552] PGD 0 [ 50.001504] [ 50.003146] Oops: 0000 [#1] PREEMPT SMP KASAN [ 50.007642] Dumping ftrace buffer: [ 50.011162] (ftrace buffer empty) [ 50.014857] Modules linked in: [ 50.018162] CPU: 1 PID: 7237 Comm: syz-executor438 Not tainted 4.9.122-g54068d6 #78 [ 50.025936] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.035293] task: ffff8801d3206000 task.stack: ffff8801d4f90000 [ 50.041334] RIP: 0010:[] [] page_remove_rmap+0x37/0x6d0 [ 50.050035] RSP: 0018:ffff8801d4f976c0 EFLAGS: 00010246 [ 50.055474] RAX: dffffc0000000000 RBX: ffffeafff9018000 RCX: 0000000000000000 [ 50.062757] RDX: 1ffffd5fff203004 RSI: ffffffff814f5918 RDI: ffffeafff9018000 [ 50.070027] RBP: ffff8801d4f976e8 R08: ffff8801d32068e8 R09: 0000000000000001 [ 50.077298] R10: ffff8801d3206000 R11: 0000000000000001 R12: ffff8801d4f97980 [ 50.084554] R13: ffffeafff9018020 R14: ffffeafff9018000 R15: 0000000000000001 [ 50.091824] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 50.100049] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.105916] CR2: ffffeafff9018020 CR3: 00000001d3d77000 CR4: 00000000001606f0 [ 50.113170] Stack: [ 50.115304] ffffeafff9018020 ffff8801d4f97980 ffff8801d42af800 ffffeafff9018000 [ 50.123339] ffff8801d3ca2898 ffff8801d4f97740 ffffffff8154cb8f ffff8801d4f97990 [ 50.131393] ffff8801d4f97988 ffff8801d4f97a00 00003ffe406001e0 00000001d42af000 [ 50.139441] Call Trace: [ 50.142020] [] zap_huge_pmd+0x16f/0x860 [ 50.147638] [] unmap_page_range+0x12ad/0x1730 [ 50.153776] [] ? vm_normal_page_pmd+0x310/0x310 [ 50.160094] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 50.167016] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 50.173867] [] unmap_single_vma+0x101/0x260 [ 50.179853] [] unmap_vmas+0x102/0x1d0 [ 50.185303] [] exit_mmap+0x214/0x3f0 [ 50.190653] [] ? SyS_munmap+0xa0/0xa0 [ 50.196101] [] mmput+0xf3/0x2d0 [ 50.201023] [] do_exit+0x906/0x27b0 [ 50.206293] [] ? debug_check_no_locks_freed+0x210/0x210 [ 50.213311] [] ? get_futex_key+0x1090/0x1090 [ 50.219367] [] ? change_protection+0xf0/0x12c0 [ 50.225619] [] ? release_task.part.19+0x1210/0x1210 [ 50.232364] [] ? recalc_sigpending+0x72/0x90 [ 50.238416] [] do_group_exit+0x111/0x340 [ 50.244123] [] get_signal+0x4cf/0x1450 [ 50.249654] [] ? mprotect_fixup+0x437/0x930 [ 50.255621] [] do_signal+0x87/0x19f0 [ 50.260980] [] ? setup_sigcontext+0x7d0/0x7d0 [ 50.267120] [] ? do_mprotect_pkey+0x70c/0x890 [ 50.273709] [] ? do_futex+0x17c0/0x17c0 [ 50.279340] [] ? mprotect_fixup+0x930/0x930 [ 50.285296] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 50.291606] [] ? exit_to_usermode_loop+0xac/0x120 [ 50.298102] [] exit_to_usermode_loop+0xe1/0x120 [ 50.304435] [] do_syscall_64+0x364/0x490 [ 50.310142] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 50.317055] Code: 55 41 54 53 48 89 fb e8 58 b4 e6 ff 4c 8d 6b 20 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 b8 05 00 00 <4c> 8b 73 20 49 89 dc 41 f6 c6 01 0f 85 4b 03 00 00 e8 23 b4 e6 [ 50.344481] RIP [] page_remove_rmap+0x37/0x6d0 [ 50.350843] RSP [ 50.354451] CR2: ffffeafff9018020 [ 50.357890] ---[ end trace 8881afd080352db4 ]--- [ 50.357901] BUG: unable to handle kernel paging request at ffffeafff90b8020 [ 50.357913] IP: [] page_remove_rmap+0x37/0x6d0 [ 50.357919] PGD 0 [ 50.357919] [ 50.357925] Oops: 0000 [#2] PREEMPT SMP KASAN [ 50.357932] Dumping ftrace buffer: [ 50.357935] (ftrace buffer empty) [ 50.357940] Modules linked in: [ 50.357948] CPU: 0 PID: 7245 Comm: syz-executor438 Tainted: G D 4.9.122-g54068d6 #78 [ 50.357952] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.357956] task: ffff8801d0863000 task.stack: ffff8801d06d8000 [ 50.357966] RIP: 0010:[] [] page_remove_rmap+0x37/0x6d0 [ 50.357970] RSP: 0018:ffff8801d06df6c0 EFLAGS: 00010246 [ 50.357975] RAX: dffffc0000000000 RBX: ffffeafff90b8000 RCX: 0000000000000000 [ 50.357979] RDX: 1ffffd5fff217004 RSI: ffffffff814f5918 RDI: ffffeafff90b8000 [ 50.357983] RBP: ffff8801d06df6e8 R08: 0000000000000001 R09: 0000000000000000 [ 50.357987] R10: ffff8801d0863000 R11: 0000000000000000 R12: ffff8801d06df980 [ 50.357991] R13: ffffeafff90b8020 R14: ffffeafff90b8000 R15: 0000000000000001 [ 50.357997] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 50.358002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.358006] CR2: ffffeafff90b8020 CR3: 00000001caa75000 CR4: 00000000001606f0 [ 50.358011] Stack: [ 50.358022] ffffeafff90b8020 ffff8801d06df980 ffff8801d4dd0800 ffffeafff90b8000 [ 50.358032] ffff8801d3ca2528 ffff8801d06df740 ffffffff8154cb8f ffff8801d06df990 [ 50.358048] ffff8801d06df988 ffff8801d06dfa00 00003ffe42e001e0 00000001d4dd0000 [ 50.358050] Call Trace: [ 50.358061] [] zap_huge_pmd+0x16f/0x860 [ 50.358070] [] unmap_page_range+0x12ad/0x1730 [ 50.358079] [] ? vm_normal_page_pmd+0x310/0x310 [ 50.358089] [] ? debug_check_no_obj_freed+0x164/0x930 [ 50.358096] [] unmap_single_vma+0x101/0x260 [ 50.358104] [] unmap_vmas+0x102/0x1d0 [ 50.358110] [] exit_mmap+0x214/0x3f0 [ 50.358117] [] ? SyS_munmap+0xa0/0xa0 [ 50.358125] [] mmput+0xf3/0x2d0 [ 50.358133] [] do_exit+0x906/0x27b0 [ 50.358143] [] ? debug_check_no_locks_freed+0x210/0x210 [ 50.358151] [] ? get_futex_key+0x1090/0x1090 [ 50.358159] [] ? release_task.part.19+0x1210/0x1210 [ 50.358168] [] ? __dequeue_signal+0x79/0x520 [ 50.358175] [] ? recalc_sigpending_tsk+0xf9/0x150 [ 50.358183] [] ? recalc_sigpending+0x72/0x90 [ 50.358190] [] ? dequeue_signal+0xc4/0x4b0 [ 50.358197] [] ? kernel_sigaction+0x230/0x230 [ 50.358204] [] do_group_exit+0x111/0x340 [ 50.358212] [] get_signal+0x4cf/0x1450 [ 50.358221] [] do_signal+0x87/0x19f0 [ 50.358228] [] ? __lock_timer+0x24f/0x3f0 [ 50.358235] [] ? __lock_timer+0x27d/0x3f0 [ 50.358242] [] ? __lock_timer+0x28/0x3f0 [ 50.358250] [] ? setup_sigcontext+0x7d0/0x7d0 [ 50.358257] [] ? SyS_timer_settime+0x2cc/0x3e0 [ 50.358265] [] ? do_futex+0x17c0/0x17c0 [ 50.358274] [] ? __do_page_fault+0x183/0xd50 [ 50.358282] [] exit_to_usermode_loop+0xe1/0x120 [ 50.358288] [] do_syscall_64+0x364/0x490 [ 50.358297] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 50.358414] Code: 55 41 54 53 48 89 fb e8 58 b4 e6 ff 4c 8d 6b 20 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 b8 05 00 00 <4c> 8b 73 20 49 89 dc 41 f6 c6 01 0f 85 4b 03 00 00 e8 23 b4 e6 [ 50.358422] RIP [] page_remove_rmap+0x37/0x6d0 [ 50.358424] RSP [ 50.358427] CR2: ffffeafff90b8020 [ 50.358433] ---[ end trace 8881afd080352db5 ]--- [ 50.358437] Kernel panic - not syncing: Fatal exception [ 51.481274] Shutting down cpus with NMI [ 51.485595] Dumping ftrace buffer: [ 51.489117] (ftrace buffer empty) [ 51.492803] Kernel Offset: disabled [ 51.496404] Rebooting in 86400 seconds..