[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.757444] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 22.689015] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.088007] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 23.738817] random: sshd: uninitialized urandom read (32 bytes read, 63 bits of entropy available) [ 23.912837] random: sshd: uninitialized urandom read (32 bytes read, 66 bits of entropy available) Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. [ 29.652420] random: sshd: uninitialized urandom read (32 bytes read, 72 bits of entropy available) executing program [ 29.743141] BUG: unable to handle kernel paging request at ffffeafffd3d8008 [ 29.750527] IP: [] page_remove_rmap+0x2e/0x260 [ 29.756777] PGD 0 [ 29.759036] Oops: 0000 [#1] PREEMPT SMP KASAN [ 29.763992] Dumping ftrace buffer: [ 29.767506] (ftrace buffer empty) [ 29.771211] Modules linked in: [ 29.774517] CPU: 1 PID: 3818 Comm: syz-executor145 Not tainted 4.4.148-gf057ff9 #81 [ 29.782301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.791664] task: ffff8801d947b000 task.stack: ffff8800ada98000 [ 29.797702] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 29.806391] RSP: 0018:ffff8800ada9f9c0 EFLAGS: 00010246 [ 29.811838] RAX: dffffc0000000000 RBX: ffffeafffd3d8000 RCX: 0000000000000000 [ 29.819093] RDX: 1ffffd5fffa7b001 RSI: ffffffff814bc75f RDI: ffffeafffd3d8008 [ 29.826363] RBP: ffff8800ada9f9d0 R08: ffffffff85363fb0 R09: 0000000000000000 [ 29.833648] R10: 0000000000000001 R11: ffff8801d947b000 R12: 0000000000000001 [ 29.840901] R13: 1ffff10015b53f3e R14: ffff8800b0ce2800 R15: ffffeafffd3d8000 [ 29.848150] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 29.856355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.862216] CR2: ffffeafffd3d8008 CR3: 00000000b0cd4000 CR4: 00000000001606f0 [ 29.869463] Stack: [ 29.871586] ffff8800ada9fc50 0000000000000001 ffff8800ada9fa78 ffffffff8150a1f3 [ 29.879620] 00003fff4f6001e0 00003fff4f6001e0 0000000041b58ab3 ffffffff841ef82f [ 29.887621] ffffffff81509ff0 00000000000004f0 ffff8800bb81c108 ffff8800ada9fa40 [ 29.895652] Call Trace: [ 29.898219] [] zap_huge_pmd+0x203/0x510 [ 29.903835] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 29.910391] [] unmap_single_vma+0xea3/0x1240 [ 29.916436] [] ? vm_normal_page+0x230/0x230 [ 29.922410] [] ? __put_single_page+0x60/0x60 [ 29.928455] [] unmap_vmas+0x81/0xd0 [ 29.933745] [] exit_mmap+0x1c9/0x3a0 [ 29.939087] [] ? SyS_remap_file_pages+0x870/0x870 [ 29.945583] [] ? kmem_cache_free+0x2b4/0x340 [ 29.951661] [] mmput+0xf8/0x2d0 [ 29.956566] [] do_exit+0x8d8/0x26b0 [ 29.961821] [] ? file_map_prot_check+0x193/0x310 [ 29.968203] [] ? release_task.part.17+0x1200/0x1200 [ 29.974844] [] ? SyS_mprotect+0x41e/0x640 [ 29.980617] [] ? up_write+0x1a/0x60 [ 29.985869] [] ? SyS_mprotect+0x423/0x640 [ 29.991645] [] do_group_exit+0x111/0x330 [ 29.997332] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 30.003797] [] SyS_exit_group+0x1d/0x20 [ 30.009403] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 30.015956] Code: e5 41 54 53 48 89 fb e8 e1 77 e9 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 de 01 00 00 43 08 01 0f 84 4e 01 00 00 e8 b3 77 e9 ff f0 83 43 18 ff 78 [ 30.043070] RIP [] page_remove_rmap+0x2e/0x260 [ 30.049422] RSP [ 30.053022] CR2: ffffeafffd3d8008 [ 30.056452] ---[ end trace cfb8d20e582b8c2d ]--- [ 30.061184] Kernel panic - not syncing: Fatal exception [ 30.066827] Dumping ftrace buffer: [ 30.070352] (ftrace buffer empty) [ 30.074036] Kernel Offset: disabled [ 30.077638] Rebooting in 86400 seconds..