[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.148405] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 21.268778] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.595676] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 22.391456] random: sshd: uninitialized urandom read (32 bytes read, 74 bits of entropy available) [ 22.560996] random: sshd: uninitialized urandom read (32 bytes read, 76 bits of entropy available) Warning: Permanently added '10.128.10.54' (ECDSA) to the list of known hosts. [ 28.086686] random: sshd: uninitialized urandom read (32 bytes read, 83 bits of entropy available) executing program [ 28.170968] BUG: unable to handle kernel paging request at ffffeafff8b70008 [ 28.178312] IP: [] page_remove_rmap+0x2e/0x260 [ 28.184598] PGD 0 [ 28.186846] Oops: 0000 [#1] PREEMPT SMP KASAN [ 28.191811] Dumping ftrace buffer: [ 28.195326] (ftrace buffer empty) [ 28.199013] Modules linked in: [ 28.202357] CPU: 0 PID: 3745 Comm: syz-executor573 Not tainted 4.4.149-gf76bdbd #18 [ 28.210210] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.219546] task: ffff8800b432e000 task.stack: ffff8801cc670000 [ 28.225575] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 28.234303] RSP: 0018:ffff8801cc677948 EFLAGS: 00010246 [ 28.239725] RAX: dffffc0000000000 RBX: ffffeafff8b70000 RCX: 0000000000000000 [ 28.246968] RDX: 1ffffd5fff16e001 RSI: ffffffff814bc8bf RDI: ffffeafff8b70008 [ 28.254214] RBP: ffff8801cc677958 R08: ffffffff85363fb0 R09: 0000000000000000 [ 28.261476] R10: 0000000000000001 R11: ffff8800b432e000 R12: 0000000000000001 [ 28.268720] R13: 1ffff100398cef2f R14: ffff8801d12b3800 R15: ffffeafff8b70000 [ 28.275980] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 28.284184] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.290411] CR2: ffffeafff8b70008 CR3: 00000001ce521000 CR4: 00000000001606f0 [ 28.297689] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.304935] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.312193] Stack: [ 28.314322] ffff8801cc677bd8 0000000000000001 ffff8801cc677a00 ffffffff8150a443 [ 28.322339] 00003ffe2dc001e0 00003ffe2dc001e0 0000000041b58ab3 ffffffff841ef837 [ 28.330361] ffffffff8150a240 00000000000004f0 ffff8801cd611580 ffff8801cc6779c8 [ 28.338348] Call Trace: [ 28.340928] [] zap_huge_pmd+0x203/0x510 [ 28.346530] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 28.353086] [] unmap_single_vma+0xea3/0x1240 [ 28.359137] [] ? vm_normal_page+0x230/0x230 [ 28.365099] [] ? __put_single_page+0x60/0x60 [ 28.371150] [] unmap_vmas+0x81/0xd0 [ 28.376402] [] exit_mmap+0x1c9/0x3a0 [ 28.381759] [] ? SyS_remap_file_pages+0x870/0x870 [ 28.388232] [] ? up_write+0x1a/0x60 [ 28.393499] [] mmput+0xf8/0x2d0 [ 28.398401] [] do_exit+0x8d8/0x26b0 [ 28.403656] [] ? file_map_prot_check+0x193/0x310 [ 28.410055] [] ? release_task.part.17+0x1200/0x1200 [ 28.416715] [] ? SyS_mprotect+0x41e/0x640 [ 28.422486] [] ? up_write+0x1a/0x60 [ 28.427742] [] ? SyS_mprotect+0x423/0x640 [ 28.433522] [] do_group_exit+0x111/0x330 [ 28.439210] [] ? do_group_exit+0x330/0x330 [ 28.445066] [] SyS_exit_group+0x1d/0x20 [ 28.450696] [] do_fast_syscall_32+0x324/0x8b0 [ 28.456818] [] sysenter_flags_fixed+0xd/0x1a [ 28.462847] 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 [ 28.490028] RIP [] page_remove_rmap+0x2e/0x260 [ 28.496358] RSP [ 28.499956] CR2: ffffeafff8b70008 [ 28.503381] ---[ end trace a415522e17c6ff3c ]--- [ 28.508110] Kernel panic - not syncing: Fatal exception [ 28.513856] Dumping ftrace buffer: [ 28.517402] (ftrace buffer empty) [ 28.521102] Kernel Offset: disabled [ 28.524706] Rebooting in 86400 seconds..