[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.165170] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.760917] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 29.242436] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 29.984106] random: sshd: uninitialized urandom read (32 bytes read, 80 bits of entropy available) [ 30.157220] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available) Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. [ 35.744918] random: sshd: uninitialized urandom read (32 bytes read, 91 bits of entropy available) executing program [ 35.832441] BUG: unable to handle kernel paging request at ffffeafffd400008 [ 35.839838] IP: [] page_remove_rmap+0x2e/0x260 [ 35.846096] PGD 0 [ 35.848338] Oops: 0000 [#1] PREEMPT SMP KASAN [ 35.853319] Dumping ftrace buffer: [ 35.856833] (ftrace buffer empty) [ 35.860523] Modules linked in: [ 35.863841] CPU: 1 PID: 3842 Comm: syz-executor902 Not tainted 4.4.148-gf057ff9 #81 [ 35.871606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.880962] task: ffff8801d37c6000 task.stack: ffff8801c7618000 [ 35.887014] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 35.895713] RSP: 0018:ffff8801c761f9c0 EFLAGS: 00010246 [ 35.901137] RAX: dffffc0000000000 RBX: ffffeafffd400000 RCX: 0000000000000000 [ 35.908384] RDX: 1ffffd5fffa80001 RSI: ffffffff814bc75f RDI: ffffeafffd400008 [ 35.915629] RBP: ffff8801c761f9d0 R08: ffffffff85363fb0 R09: 0000000000000000 [ 35.922877] R10: 0000000000000001 R11: ffff8801d37c6000 R12: 0000000000000001 [ 35.930183] R13: 1ffff10038ec3f3e R14: ffff8800b057e800 R15: ffffeafffd400000 [ 35.937456] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 35.945659] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.951557] CR2: ffffeafffd400008 CR3: 00000000acd73000 CR4: 00000000001606f0 [ 35.958802] Stack: [ 35.960943] ffff8801c761fc50 0000000000000001 ffff8801c761fa78 ffffffff8150a1f3 [ 35.968952] 00003fff500001e0 00003fff500001e0 0000000041b58ab3 ffffffff841ef82f [ 35.976976] ffffffff81509ff0 00000000000004f0 ffff8801cc74e5d8 ffff8801c761fa40 [ 35.984996] Call Trace: [ 35.987582] [] zap_huge_pmd+0x203/0x510 [ 35.993184] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 35.999739] [] unmap_single_vma+0xea3/0x1240 [ 36.005788] [] ? vm_normal_page+0x230/0x230 [ 36.011738] [] ? __put_single_page+0x60/0x60 [ 36.017788] [] unmap_vmas+0x81/0xd0 [ 36.023060] [] exit_mmap+0x1c9/0x3a0 [ 36.028417] [] ? SyS_remap_file_pages+0x870/0x870 [ 36.034890] [] ? up_write+0x1a/0x60 [ 36.040144] [] mmput+0xf8/0x2d0 [ 36.045069] [] do_exit+0x8d8/0x26b0 [ 36.050324] [] ? file_map_prot_check+0x193/0x310 [ 36.056705] [] ? release_task.part.17+0x1200/0x1200 [ 36.063348] [] ? SyS_mprotect+0x41e/0x640 [ 36.069123] [] ? up_write+0x1a/0x60 [ 36.074377] [] ? SyS_mprotect+0x423/0x640 [ 36.080159] [] do_group_exit+0x111/0x330 [ 36.085846] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 36.092331] [] SyS_exit_group+0x1d/0x20 [ 36.097935] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 36.104488] 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 [ 36.131596] RIP [] page_remove_rmap+0x2e/0x260 [ 36.137937] RSP [ 36.141536] CR2: ffffeafffd400008 [ 36.144963] ---[ end trace c9f637a93cf0dbd2 ]--- [ 36.149707] Kernel panic - not syncing: Fatal exception [ 36.155386] Dumping ftrace buffer: [ 36.158914] (ftrace buffer empty) [ 36.162598] Kernel Offset: disabled [ 36.166207] Rebooting in 86400 seconds..