[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.713823] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.711247] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 27.006543] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 27.528803] random: sshd: uninitialized urandom read (32 bytes read, 53 bits of entropy available) [ 57.511059] random: sshd: uninitialized urandom read (32 bytes read, 65 bits of entropy available) Warning: Permanently added '10.128.0.41' (ECDSA) to the list of known hosts. [ 63.096616] random: sshd: uninitialized urandom read (32 bytes read, 71 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 [ 64.319391] BUG: unable to handle kernel paging request at ffffeafff8d70008 [ 64.326773] IP: [] page_remove_rmap+0x2e/0x260 [ 64.333078] PGD 0 [ 64.335703] Oops: 0000 [#1] PREEMPT SMP KASAN [ 64.340795] Dumping ftrace buffer: [ 64.344308] (ftrace buffer empty) [ 64.347994] Modules linked in: [ 64.351289] CPU: 0 PID: 5716 Comm: syz-executor168 Not tainted 4.4.148-gf057ff9 #81 [ 64.359059] 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 executing program executing program executing program executing program executing program executing program [ 64.368773] task: ffff8801d6896000 task.stack: ffff8801d72f8000 [ 64.374809] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 64.383508] RSP: 0018:ffff8801d72ff720 EFLAGS: 00010246 [ 64.388931] RAX: dffffc0000000000 RBX: ffffeafff8d70000 RCX: 0000000000000000 [ 64.396288] RDX: 1ffffd5fff1ae001 RSI: ffffffff814bc75f RDI: ffffeafff8d70008 [ 64.403561] RBP: ffff8801d72ff730 R08: ffffffff85363fb0 R09: 0000000000000000 [ 64.410826] R10: 0000000000000001 R11: ffff8801d6896000 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 executing program [ 64.418095] R13: 1ffff1003ae5feea R14: ffff8800b930b800 R15: ffffeafff8d70000 [ 64.425365] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 64.433582] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.439460] CR2: ffffeafff8d70008 CR3: 00000000b90e4000 CR4: 00000000001606f0 [ 64.446721] Stack: [ 64.448870] ffff8801d72ff9b0 0000000000000001 ffff8801d72ff7d8 ffffffff8150a1f3 [ 64.456941] 00003ffe35c001e0 00003ffe35c001e0 0000000041b58ab3 ffffffff841ef82f executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.465007] ffffffff81509ff0 00000000000004f0 ffff8800b9541c08 ffff8801d72ff7a0 [ 64.473083] Call Trace: [ 64.475670] [] zap_huge_pmd+0x203/0x510 [ 64.481291] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 64.487868] [] unmap_single_vma+0xea3/0x1240 [ 64.493934] [] ? vm_normal_page+0x230/0x230 [ 64.499923] [] ? debug_check_no_locks_freed+0x210/0x210 [ 64.506949] [] ? debug_check_no_locks_freed+0x210/0x210 [ 64.513966] [] unmap_vmas+0x81/0xd0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.519247] [] exit_mmap+0x1c9/0x3a0 [ 64.524608] [] ? SyS_remap_file_pages+0x870/0x870 [ 64.531105] [] ? up_write+0x1a/0x60 [ 64.536388] [] mmput+0xf8/0x2d0 [ 64.541319] [] do_exit+0x8d8/0x26b0 [ 64.546600] [] ? debug_check_no_locks_freed+0x210/0x210 [ 64.553612] [] ? release_task.part.17+0x1200/0x1200 [ 64.560275] [] ? rcu_read_lock_sched_held+0x103/0x120 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.567114] [] ? recalc_sigpending+0x76/0xa0 [ 64.573188] [] do_group_exit+0x111/0x330 [ 64.578900] [] get_signal+0x4ec/0x14b0 [ 64.584452] [] do_signal+0x8b/0x1d30 [ 64.589817] [] ? setup_sigcontext+0x780/0x780 [ 64.595968] [] ? do_utimes+0x1b8/0x2c0 [ 64.601515] [] ? utimes_common.isra.1+0x5e0/0x5e0 [ 64.608015] [] ? __might_fault+0x114/0x1d0 [ 64.613920] [] ? SyS_futex+0x1f8/0x300 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 64.619464] [] ? exit_to_usermode_loop+0xe4/0x160 [ 64.625957] [] exit_to_usermode_loop+0x11a/0x160 [ 64.632362] [] syscall_return_slowpath+0x1b5/0x1f0 [ 64.638949] [] int_ret_from_sys_call+0x25/0xa3 executing program executing program executing program executing program executing program executing program executing program executing program [ 64.645167] 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 [ 64.673114] RIP [] page_remove_rmap+0x2e/0x260 [ 64.679497] RSP [ 64.683112] CR2: ffffeafff8d70008 [ 64.686560] ---[ end trace 7a50ef224dd792ba ]--- [ 64.691305] Kernel panic - not syncing: Fatal exception [ 64.696976] Dumping ftrace buffer: [ 64.700515] (ftrace buffer empty) [ 64.704203] Kernel Offset: disabled [ 64.707808] Rebooting in 86400 seconds..