[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.780440] 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: [ 24.700039] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 25.031597] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 25.780247] random: sshd: uninitialized urandom read (32 bytes read, 74 bits of entropy available) [ 40.725567] random: sshd: uninitialized urandom read (32 bytes read, 83 bits of entropy available) Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. [ 46.394383] random: sshd: uninitialized urandom read (32 bytes read, 91 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 [ 46.603605] BUG: unable to handle kernel paging request at ffffeafffd358008 [ 46.610983] IP: [] page_remove_rmap+0x2e/0x260 [ 46.617230] PGD 0 [ 46.619639] Oops: 0000 [#1] PREEMPT SMP KASAN [ 46.624586] Dumping ftrace buffer: [ 46.628101] (ftrace buffer empty) [ 46.631786] Modules linked in: [ 46.635072] CPU: 0 PID: 3865 Comm: syz-executor044 Not tainted 4.4.148-gf057ff9 #81 [ 46.642885] 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 executing program executing program executing program executing program executing program executing program [ 46.652227] task: ffff8801ca47c800 task.stack: ffff8801d94c0000 [ 46.658261] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 46.667047] RSP: 0018:ffff8801d94c7720 EFLAGS: 00010246 [ 46.672539] RAX: dffffc0000000000 RBX: ffffeafffd358000 RCX: 0000000000000000 [ 46.679797] RDX: 1ffffd5fffa6b001 RSI: ffffffff814bc75f RDI: ffffeafffd358008 [ 46.687044] RBP: ffff8801d94c7730 R08: ffffffff85363fb0 R09: 0000000000000000 [ 46.694415] R10: 0000000000000001 R11: ffff8801ca47c800 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.701672] R13: 1ffff1003b298eea R14: ffff8801d1a14800 R15: ffffeafffd358000 [ 46.708924] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 46.717227] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.723081] CR2: ffffeafffd358008 CR3: 00000001d0cfd000 CR4: 00000000001606f0 [ 46.730330] Stack: [ 46.732455] ffff8801d94c79b0 0000000000000001 ffff8801d94c77d8 ffffffff8150a1f3 [ 46.740509] 00003fff4d6001e0 00003fff4d6001e0 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 executing program executing program executing program executing program executing program executing program executing program executing program [ 46.748496] ffffffff81509ff0 00000000000004f0 ffff8801cafb2dc0 ffff8801d94c77a0 [ 46.756479] Call Trace: [ 46.759082] [] zap_huge_pmd+0x203/0x510 [ 46.764697] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 46.771256] [] unmap_single_vma+0xea3/0x1240 [ 46.777391] [] ? vm_normal_page+0x230/0x230 [ 46.783352] [] ? __put_single_page+0x60/0x60 [ 46.789389] [] unmap_vmas+0x81/0xd0 [ 46.794652] [] exit_mmap+0x1c9/0x3a0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.800012] [] ? SyS_remap_file_pages+0x870/0x870 [ 46.806500] [] ? up_write+0x1a/0x60 [ 46.811774] [] mmput+0xf8/0x2d0 [ 46.816695] [] do_exit+0x8d8/0x26b0 [ 46.821973] [] ? debug_check_no_locks_freed+0x210/0x210 [ 46.828982] [] ? release_task.part.17+0x1200/0x1200 [ 46.835674] [] ? recalc_sigpending+0x76/0xa0 [ 46.841735] [] do_group_exit+0x111/0x330 [ 46.847452] [] get_signal+0x4ec/0x14b0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.852983] [] do_signal+0x8b/0x1d30 [ 46.858339] [] ? setup_sigcontext+0x780/0x780 [ 46.864484] [] ? file_map_prot_check+0x193/0x310 [ 46.870888] [] ? SyS_futex+0x1f8/0x300 [ 46.876433] [] ? exit_to_usermode_loop+0xe4/0x160 [ 46.882923] [] exit_to_usermode_loop+0x11a/0x160 [ 46.889325] [] syscall_return_slowpath+0x1b5/0x1f0 [ 46.895904] [] int_ret_from_sys_call+0x25/0xa3 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 46.902134] 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 [ 46.930091] RIP [] page_remove_rmap+0x2e/0x260 [ 46.936453] RSP [ 46.940070] CR2: ffffeafffd358008 [ 46.943517] ---[ end trace 5dbb2b177660654c ]--- [ 46.948263] Kernel panic - not syncing: Fatal exception [ 46.953949] Dumping ftrace buffer: [ 46.957483] (ftrace buffer empty) [ 46.961166] Kernel Offset: disabled [ 46.964906] Rebooting in 86400 seconds..