[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.916854] 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: [ 26.310422] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 26.784804] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 27.393389] random: sshd: uninitialized urandom read (32 bytes read, 58 bits of entropy available) [ 44.263830] random: sshd: uninitialized urandom read (32 bytes read, 69 bits of entropy available) Warning: Permanently added '10.128.10.1' (ECDSA) to the list of known hosts. [ 49.891136] random: sshd: uninitialized urandom read (32 bytes read, 75 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 [ 51.938444] BUG: unable to handle kernel paging request at ffffeafff8c78008 [ 51.945875] IP: [] page_remove_rmap+0x2e/0x260 [ 51.952171] PGD 0 [ 51.954441] Oops: 0000 [#1] PREEMPT SMP KASAN [ 51.959455] Dumping ftrace buffer: [ 51.962983] (ftrace buffer empty) [ 51.966687] Modules linked in: [ 51.970002] CPU: 0 PID: 5646 Comm: syz-executor692 Not tainted 4.4.148-gf057ff9 #81 [ 51.977783] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.987129] task: ffff8801d6df9800 task.stack: ffff8801d7ba8000 [ 51.993176] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 52.001891] RSP: 0018:ffff8801d7baf720 EFLAGS: 00010246 [ 52.007340] RAX: dffffc0000000000 RBX: ffffeafff8c78000 RCX: 0000000000000000 [ 52.014607] RDX: 1ffffd5fff18f001 RSI: ffffffff814bc75f RDI: ffffeafff8c78008 [ 52.021868] RBP: ffff8801d7baf730 R08: ffffffff85302320 R09: 0000000000000000 [ 52.029137] R10: 0000000000000001 R11: ffff8801d6df9800 R12: 0000000000000001 [ 52.036412] R13: 1ffff1003af75eea R14: ffff8800b98fb800 R15: ffffeafff8c78000 [ 52.043692] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 52.051918] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.057792] CR2: ffffeafff8c78008 CR3: 00000000babb5000 CR4: 00000000001606f0 [ 52.065051] Stack: [ 52.067190] ffff8801d7baf9b0 0000000000000001 ffff8801d7baf7d8 ffffffff8150a1f3 [ 52.075247] 00003ffe31e001e0 00003ffe31e001e0 0000000041b58ab3 ffffffff841ef82f [ 52.083297] ffffffff81509ff0 00000000000004f0 ffff8800b99ebc60 ffff8801d7baf7a0 [ 52.091362] Call Trace: [ 52.093950] [] zap_huge_pmd+0x203/0x510 [ 52.099569] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 52.106150] [] unmap_single_vma+0xea3/0x1240 [ 52.112304] [] ? vm_normal_page+0x230/0x230 [ 52.118278] [] ? __put_single_page+0x60/0x60 [ 52.124338] [] unmap_vmas+0x81/0xd0 [ 52.129612] [] exit_mmap+0x1c9/0x3a0 [ 52.134972] [] ? SyS_remap_file_pages+0x870/0x870 [ 52.142502] [] ? up_write+0x1a/0x60 [ 52.147772] [] mmput+0xf8/0x2d0 [ 52.152691] [] do_exit+0x8d8/0x26b0 [ 52.157964] [] ? debug_check_no_locks_freed+0x210/0x210 [ 52.164971] [] ? release_task.part.17+0x1200/0x1200 [ 52.171719] [] ? recalc_sigpending+0x76/0xa0 [ 52.177771] [] do_group_exit+0x111/0x330 [ 52.183475] [] get_signal+0x4ec/0x14b0 [ 52.189010] [] do_signal+0x8b/0x1d30 [ 52.194371] [] ? __fd_install+0x255/0x600 [ 52.200203] [] ? get_unused_fd_flags+0xd0/0xd0 [ 52.206439] [] ? setup_sigcontext+0x780/0x780 [ 52.212586] [] ? get_unused_fd_flags+0xd0/0xd0 [ 52.218819] [] ? SyS_futex+0x1f8/0x300 [ 52.224388] [] ? exit_to_usermode_loop+0xe4/0x160 [ 52.230884] [] exit_to_usermode_loop+0x11a/0x160 [ 52.237294] [] syscall_return_slowpath+0x1b5/0x1f0 [ 52.243875] [] int_ret_from_sys_call+0x25/0xa3 [ 52.250097] 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 [ 52.277861] RIP [] page_remove_rmap+0x2e/0x260 [ 52.284222] RSP [ 52.287837] CR2: ffffeafff8c78008 [ 52.291370] ---[ end trace fb3f03926169b729 ]--- [ 52.296114] Kernel panic - not syncing: Fatal exception [ 52.301741] Dumping ftrace buffer: [ 52.305264] (ftrace buffer empty) [ 52.308952] Kernel Offset: disabled [ 52.312553] Rebooting in 86400 seconds..