[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.498858] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.289793] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 26.893624] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 27.595078] random: sshd: uninitialized urandom read (32 bytes read, 71 bits of entropy available) [ 46.967892] random: sshd: uninitialized urandom read (32 bytes read, 82 bits of entropy available) Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. [ 52.614542] random: sshd: uninitialized urandom read (32 bytes read, 89 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.509116] BUG: unable to handle kernel paging request at ffffeafffd4b8008 [ 54.516514] IP: [] page_remove_rmap+0x2e/0x260 [ 54.522788] PGD 0 [ 54.525062] Oops: 0000 [#1] PREEMPT SMP KASAN [ 54.530136] Dumping ftrace buffer: [ 54.533664] (ftrace buffer empty) [ 54.537376] Modules linked in: [ 54.540694] CPU: 0 PID: 6435 Comm: syz-executor270 Not tainted 4.4.150-g5541782 #19 [ 54.548471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.557816] task: ffff8800b7bbb000 task.stack: ffff8800adca0000 [ 54.563864] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 54.572577] RSP: 0018:ffff8800adca76d8 EFLAGS: 00010246 [ 54.578012] RAX: dffffc0000000000 RBX: ffffeafffd4b8000 RCX: 0000000000000000 [ 54.585273] RDX: 1ffffd5fffa97001 RSI: ffffffff814bceaf RDI: ffffeafffd4b8008 [ 54.592536] RBP: ffff8800adca76e8 R08: ffffffff85363fb0 R09: 0000000000000000 [ 54.599798] R10: 0000000000000001 R11: ffff8800b7bbb000 R12: 0000000000000001 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.607057] R13: 1ffff10015b94ee1 R14: ffff8800aea9b800 R15: ffffeafffd4b8000 [ 54.614321] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 54.622546] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 54.628419] CR2: ffffeafffd4b8008 CR3: 00000000bab65000 CR4: 00000000001606f0 [ 54.635680] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.642943] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.650199] Stack: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.652333] ffff8800adca7968 0000000000000001 ffff8800adca7790 ffffffff8150ad13 [ 54.660401] 00003fff52e001e0 00003fff52e001e0 0000000041b58ab3 ffffffff841ef837 [ 54.668450] ffffffff8150ab10 00000000000004f0 ffff8801c9646370 ffff8800adca7758 [ 54.676514] Call Trace: [ 54.679096] [] zap_huge_pmd+0x203/0x510 [ 54.684718] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 54.691291] [] unmap_single_vma+0xea3/0x1240 [ 54.697341] [] ? vm_normal_page+0x280/0x280 [ 54.703325] [] ? __put_single_page+0x60/0x60 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.709394] [] unmap_vmas+0x81/0xd0 [ 54.714667] [] exit_mmap+0x1c9/0x3a0 [ 54.720023] [] ? SyS_remap_file_pages+0x870/0x870 [ 54.726509] [] ? up_write+0x1a/0x60 [ 54.731780] [] mmput+0xf8/0x2d0 [ 54.736699] [] do_exit+0x8d8/0x26b0 [ 54.741969] [] ? __lock_acquire+0xa86/0x5270 [ 54.748021] [] ? release_task.part.17+0x1200/0x1200 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.754687] [] ? recalc_sigpending+0x76/0xa0 [ 54.760737] [] do_group_exit+0x111/0x330 [ 54.766439] [] get_signal+0x4ec/0x14b0 [ 54.771970] [] ? SyS_timer_settime+0x2ba/0x3c0 [ 54.778202] [] do_signal+0x8b/0x1d30 [ 54.783562] [] ? setup_sigcontext+0x780/0x780 [ 54.789706] [] ? __compat_get_timespec.isra.10+0xdd/0x150 [ 54.796889] [] ? compat_SyS_futex+0x1e1/0x2f0 [ 54.803032] [] ? compat_SyS_get_robust_list+0x310/0x310 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.810038] [] ? exit_to_usermode_loop+0xe4/0x160 [ 54.816526] [] exit_to_usermode_loop+0x11a/0x160 [ 54.822928] [] do_fast_syscall_32+0x61e/0x8b0 [ 54.829068] [] sysenter_flags_fixed+0xd/0x1a executing program executing program executing program executing program executing program executing program executing program executing program [ 54.835112] 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 [ 54.862835] RIP [] page_remove_rmap+0x2e/0x260 [ 54.869201] RSP [ 54.872814] CR2: ffffeafffd4b8008 [ 54.876257] ---[ end trace 57a4ed8a0bd1078a ]--- [ 54.881001] Kernel panic - not syncing: Fatal exception [ 54.886400] Dumping ftrace buffer: [ 54.889919] (ftrace buffer empty) [ 54.893604] Kernel Offset: disabled [ 54.897223] Rebooting in 86400 seconds..