[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.361748] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 29.288063] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 29.550399] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 30.215142] random: sshd: uninitialized urandom read (32 bytes read, 62 bits of entropy available) [ 30.384961] random: sshd: uninitialized urandom read (32 bytes read, 65 bits of entropy available) Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. [ 35.913479] random: sshd: uninitialized urandom read (32 bytes read, 71 bits of entropy available) executing program [ 36.000767] BUG: unable to handle kernel paging request at ffffeafffd350008 [ 36.008133] IP: [] page_remove_rmap+0x2e/0x260 [ 36.014402] PGD 0 [ 36.016644] Oops: 0000 [#1] PREEMPT SMP KASAN [ 36.021606] Dumping ftrace buffer: [ 36.025116] (ftrace buffer empty) [ 36.028955] Modules linked in: [ 36.032249] CPU: 0 PID: 3808 Comm: syz-executor575 Not tainted 4.4.150-g5541782 #83 [ 36.040131] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.049464] task: ffff8801c987c800 task.stack: ffff8800aeae0000 [ 36.055504] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 36.064184] RSP: 0018:ffff8800aeae79c0 EFLAGS: 00010246 [ 36.069759] RAX: dffffc0000000000 RBX: ffffeafffd350000 RCX: 0000000000000000 [ 36.077005] RDX: 1ffffd5fffa6a001 RSI: ffffffff814bceaf RDI: ffffeafffd350008 [ 36.084253] RBP: ffff8800aeae79d0 R08: ffffffff85363fb0 R09: 0000000000000000 [ 36.091502] R10: 0000000000000001 R11: ffff8801c987c800 R12: 0000000000000001 [ 36.098816] R13: 1ffff10015d5cf3e R14: ffff8800b230f800 R15: ffffeafffd350000 [ 36.106070] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 36.114275] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.120138] CR2: ffffeafffd350008 CR3: 00000000b23aa000 CR4: 00000000001606f0 [ 36.127381] Stack: [ 36.129523] ffff8800aeae7c50 0000000000000001 ffff8800aeae7a78 ffffffff8150ad13 [ 36.137640] 00003fff4d4001e0 00003fff4d4001e0 0000000041b58ab3 ffffffff841ef837 [ 36.145714] ffffffff8150ab10 00000000000004f0 ffff8800b22a5000 ffff8800aeae7a40 [ 36.153779] Call Trace: [ 36.156357] [] zap_huge_pmd+0x203/0x510 [ 36.161960] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 36.168520] [] unmap_single_vma+0xea3/0x1240 [ 36.174559] [] ? vm_normal_page+0x280/0x280 [ 36.180508] [] ? __put_single_page+0x60/0x60 [ 36.186551] [] unmap_vmas+0x81/0xd0 [ 36.191812] [] exit_mmap+0x1c9/0x3a0 [ 36.197155] [] ? SyS_remap_file_pages+0x870/0x870 [ 36.203625] [] ? up_write+0x1a/0x60 [ 36.208877] [] mmput+0xf8/0x2d0 [ 36.213780] [] do_exit+0x8d8/0x26b0 [ 36.219038] [] ? file_map_prot_check+0x193/0x310 [ 36.225420] [] ? release_task.part.17+0x1200/0x1200 [ 36.232077] [] ? SyS_mprotect+0x41e/0x640 [ 36.237934] [] ? up_write+0x1a/0x60 [ 36.243288] [] ? SyS_mprotect+0x423/0x640 [ 36.249058] [] do_group_exit+0x111/0x330 [ 36.254743] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 36.261254] [] SyS_exit_group+0x1d/0x20 [ 36.266931] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 36.273487] 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 [ 36.300689] RIP [] page_remove_rmap+0x2e/0x260 [ 36.307012] RSP [ 36.310612] CR2: ffffeafffd350008 [ 36.314047] ---[ end trace 8853f7e5dbf6364f ]--- [ 36.318775] Kernel panic - not syncing: Fatal exception [ 36.324443] Dumping ftrace buffer: [ 36.327965] (ftrace buffer empty) [ 36.331654] Kernel Offset: disabled [ 36.335253] Rebooting in 86400 seconds..