[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.991322] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.837690] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 26.368326] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 27.161039] random: sshd: uninitialized urandom read (32 bytes read, 71 bits of entropy available) [ 27.354490] random: sshd: uninitialized urandom read (32 bytes read, 75 bits of entropy available) Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. [ 32.911063] random: sshd: uninitialized urandom read (32 bytes read, 81 bits of entropy available) executing program [ 33.005586] BUG: unable to handle kernel paging request at ffffeafff8c30008 [ 33.012952] IP: [] page_remove_rmap+0x2e/0x260 [ 33.019315] PGD 0 [ 33.021560] Oops: 0000 [#1] PREEMPT SMP KASAN [ 33.026516] Dumping ftrace buffer: [ 33.030140] (ftrace buffer empty) [ 33.033830] Modules linked in: [ 33.037119] CPU: 1 PID: 3785 Comm: syz-executor282 Not tainted 4.4.150-g5541782 #83 [ 33.045075] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.054415] task: ffff8801ca4d8000 task.stack: ffff8801d9880000 [ 33.060451] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 33.069237] RSP: 0018:ffff8801d98879c0 EFLAGS: 00010246 [ 33.074753] RAX: dffffc0000000000 RBX: ffffeafff8c30000 RCX: 0000000000000000 [ 33.082003] RDX: 1ffffd5fff186001 RSI: ffffffff814bceaf RDI: ffffeafff8c30008 [ 33.089256] RBP: ffff8801d98879d0 R08: ffffffff85363fb0 R09: 0000000000000000 [ 33.096513] R10: 0000000000000001 R11: ffff8801ca4d8000 R12: 0000000000000001 [ 33.103763] R13: 1ffff1003b310f3e R14: ffff8801d2166800 R15: ffffeafff8c30000 [ 33.111014] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 33.119218] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.125083] CR2: ffffeafff8c30008 CR3: 00000001cab9e000 CR4: 00000000001606f0 [ 33.132444] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.139700] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.146948] Stack: [ 33.149073] ffff8801d9887c50 0000000000000001 ffff8801d9887a78 ffffffff8150ad13 [ 33.157165] 00003ffe30c001e0 00003ffe30c001e0 0000000041b58ab3 ffffffff841ef837 [ 33.165244] ffffffff8150ab10 00000000000004f0 ffff8800af90c3c8 ffff8801d9887a40 [ 33.173290] Call Trace: [ 33.175911] [] zap_huge_pmd+0x203/0x510 [ 33.181546] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 33.188648] [] unmap_single_vma+0xea3/0x1240 [ 33.194694] [] ? vm_normal_page+0x280/0x280 [ 33.200651] [] ? __put_single_page+0x60/0x60 [ 33.206696] [] unmap_vmas+0x81/0xd0 [ 33.211961] [] exit_mmap+0x1c9/0x3a0 [ 33.217364] [] ? SyS_remap_file_pages+0x870/0x870 [ 33.223845] [] ? up_write+0x1a/0x60 [ 33.229109] [] mmput+0xf8/0x2d0 [ 33.234022] [] do_exit+0x8d8/0x26b0 [ 33.239504] [] ? file_map_prot_check+0x193/0x310 [ 33.245997] [] ? release_task.part.17+0x1200/0x1200 [ 33.252668] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 33.259499] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 33.266064] [] ? retint_kernel+0x2d/0x2d [ 33.271760] [] do_group_exit+0x111/0x330 [ 33.277453] [] ? SyS_exit_group+0xd/0x20 [ 33.283249] [] SyS_exit_group+0x1d/0x20 [ 33.288908] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 33.295470] Code: e5 41 54 53 48 89 fb e8 31 76 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 03 76 e9 ff f0 83 43 18 ff 78 [ 33.322522] RIP [] page_remove_rmap+0x2e/0x260 [ 33.328951] RSP [ 33.332557] CR2: ffffeafff8c30008 [ 33.335990] ---[ end trace e8f76b91f94c6f92 ]--- [ 33.340718] Kernel panic - not syncing: Fatal exception [ 33.346514] Dumping ftrace buffer: [ 33.350042] (ftrace buffer empty) [ 33.353813] Kernel Offset: disabled [ 33.357428] Rebooting in 86400 seconds..