[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.089203] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.651913] random: sshd: uninitialized urandom read (32 bytes read) [ 18.948686] random: sshd: uninitialized urandom read (32 bytes read) [ 19.512460] random: sshd: uninitialized urandom read (32 bytes read) [ 64.752501] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. [ 70.410511] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program [ 70.505675] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.538398] IPVS: Creating netns size=2536 id=2 [ 70.558578] IPVS: Creating netns size=2536 id=3 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.595881] 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 executing program executing program executing program executing program executing program executing program [ 70.636188] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.690489] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.752759] 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 executing program executing program executing program executing program executing program executing program [ 70.807208] 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 [ 70.913404] BUG: unable to handle kernel paging request at ffffeafff9198020 [ 70.920832] IP: [] page_remove_rmap+0x37/0x6d0 [ 70.927122] PGD 0 [ 70.929096] [ 70.930748] Oops: 0000 [#1] PREEMPT SMP KASAN [ 70.935243] Dumping ftrace buffer: [ 70.938785] (ftrace buffer empty) [ 70.942491] Modules linked in: [ 70.945817] CPU: 1 PID: 4289 Comm: syz-executor923 Not tainted 4.9.122-g54068d6 #26 [ 70.953610] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.962974] task: ffff8801d9819800 task.stack: ffff8801d8048000 [ 70.969276] RIP: 0010:[] [] page_remove_rmap+0x37/0x6d0 [ 70.978005] RSP: 0018:ffff8801d804f6c0 EFLAGS: 00010246 [ 70.983451] RAX: dffffc0000000000 RBX: ffffeafff9198000 RCX: 0000000000000000 [ 70.990723] RDX: 1ffffd5fff233004 RSI: ffffffff814f5918 RDI: ffffeafff9198000 [ 70.998115] RBP: ffff8801d804f6e8 R08: 00000000000360e0 R09: 0000000000000001 [ 71.005391] R10: ffff8801d9819800 R11: 0000000000000001 R12: ffff8801d804f980 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.012668] R13: ffffeafff9198020 R14: ffffeafff9198000 R15: 0000000000000001 [ 71.019943] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 71.028162] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.034039] CR2: ffffeafff9198020 CR3: 00000001ca56b000 CR4: 00000000001606f0 [ 71.041315] Stack: [ 71.043457] ffffeafff9198020 ffff8801d804f980 ffff8801b59b3800 ffffeafff9198000 [ 71.051530] ffff8801c4718e70 ffff8801d804f740 ffffffff8154cb8f ffff8801d804f990 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.059622] ffff8801d804f988 ffff8801d804fa00 00003ffe466001e0 00000001b59b3000 [ 71.067684] Call Trace: [ 71.070262] [] zap_huge_pmd+0x16f/0x860 [ 71.075890] [] unmap_page_range+0x12ad/0x1730 [ 71.082043] [] ? vm_normal_page_pmd+0x310/0x310 [ 71.088380] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 71.095318] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 71.102170] [] unmap_single_vma+0x101/0x260 [ 71.108148] [] unmap_vmas+0x102/0x1d0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.113593] [] exit_mmap+0x214/0x3f0 [ 71.118950] [] ? SyS_munmap+0xa0/0xa0 [ 71.124405] [] ? up_write+0x1a/0x60 [ 71.130205] [] mmput+0xf3/0x2d0 [ 71.135253] [] do_exit+0x906/0x27b0 [ 71.140534] [] ? debug_check_no_locks_freed+0x210/0x210 [ 71.147543] [] ? get_futex_key+0x1090/0x1090 [ 71.153607] [] ? release_task.part.19+0x1210/0x1210 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.160276] [] ? recalc_sigpending+0x72/0x90 [ 71.166343] [] do_group_exit+0x111/0x340 [ 71.172080] [] get_signal+0x4cf/0x1450 [ 71.177626] [] ? __lock_acquire+0x654/0x4070 [ 71.183686] [] do_signal+0x87/0x19f0 [ 71.189055] [] ? debug_check_no_locks_freed+0x210/0x210 [ 71.196095] [] ? setup_sigcontext+0x7d0/0x7d0 [ 71.202249] [] ? check_preemption_disabled+0x3b/0x170 [ 71.209100] [] ? do_futex+0x17c0/0x17c0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.214717] [] ? exit_to_usermode_loop+0xac/0x120 [ 71.221214] [] exit_to_usermode_loop+0xe1/0x120 [ 71.227536] [] do_syscall_64+0x364/0x490 [ 71.233256] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 71.240184] 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 [ 71.268183] RIP [] page_remove_rmap+0x37/0x6d0 [ 71.274564] RSP [ 71.278179] CR2: ffffeafff9198020 [ 71.281634] ---[ end trace b7dd15ee00bc512a ]--- [ 71.286390] Kernel panic - not syncing: Fatal exception [ 71.292033] Dumping ftrace buffer: [ 71.295578] (ftrace buffer empty) [ 71.299267] Kernel Offset: disabled [ 71.302873] Rebooting in 86400 seconds..