[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [ 10.132185] random: sshd: uninitialized urandom read (32 bytes read) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.496362] random: sshd: uninitialized urandom read (32 bytes read) [ 38.616014] random: crng init done Warning: Permanently added '10.128.0.129' (ECDSA) to the list of known hosts. 2018/12/22 23:11:59 parsed 1 programs 2018/12/22 23:12:01 executed programs: 0 [ 69.455169] audit: type=1400 audit(1545520326.302:5): avc: denied { associate } for pid=2088 comm="syz-executor2" name="syz2" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 2018/12/22 23:12:06 executed programs: 6 [ 71.860587] ------------[ cut here ]------------ [ 71.865769] WARNING: CPU: 0 PID: 5808 at arch/x86/mm/pat.c:1019 untrack_pfn+0x242/0x290 [ 71.874930] Kernel panic - not syncing: panic_on_warn set ... [ 71.874930] [ 71.882311] CPU: 1 PID: 5808 Comm: syz-executor1 Not tainted 4.9.141+ #1 [ 71.889138] ffff8801cb0d7488 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff [ 71.897160] ffffffff82a34000 0000000000000001 0000000000000009 ffff8801cb0d7548 [ 71.905158] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 71.913180] Call Trace: [ 71.915746] [] dump_stack+0xc1/0x128 [ 71.921089] [] panic+0x1bf/0x39f [ 71.926081] [] ? add_taint.cold.5+0x16/0x16 [ 71.932030] [] ? __pud_alloc+0x1d0/0x1d0 [ 71.937720] [] ? __warn.cold.8+0x14/0x2f [ 71.943408] [] ? untrack_pfn+0x242/0x290 [ 71.949093] [] __warn.cold.8+0x2f/0x2f [ 71.954608] [] warn_slowpath_null+0x2c/0x40 [ 71.960560] [] untrack_pfn+0x242/0x290 [ 71.966074] [] ? track_pfn_insert+0x170/0x170 [ 71.972193] [] ? do_wp_page+0x2010/0x2010 [ 71.977966] [] ? lru_add_drain_cpu+0x197/0x420 [ 71.984178] [] ? uprobe_munmap+0x94/0x220 [ 71.989954] [] unmap_single_vma+0x141/0x170 [ 71.995917] [] zap_page_range_single+0x1c7/0x280 [ 72.002309] [] ? unmap_single_vma+0x170/0x170 [ 72.008433] [] ? vma_interval_tree_subtree_search.part.0+0x131/0x1a0 [ 72.016554] [] ? vma_interval_tree_iter_next+0xd9/0x210 [ 72.023551] [] unmap_mapping_range+0x233/0x2d0 [ 72.029770] [] ? zap_vma_ptes+0xe0/0xe0 [ 72.035371] [] ? selinux_inode_readlink+0x190/0x190 [ 72.042011] [] ? current_kernel_time64+0xa/0x120 [ 72.048392] [] truncate_pagecache+0x78/0x90 [ 72.054338] [] truncate_setsize+0x4c/0x70 [ 72.060112] [] simple_setattr+0xca/0xf0 [ 72.065713] [] notify_change2+0xc37/0xe00 [ 72.071488] [] do_truncate2+0x13d/0x1f0 [ 72.077086] [] ? finish_open+0x180/0x180 [ 72.082774] [] ? vfs_open+0x89/0x210 [ 72.088114] [] path_openat+0xb86/0x2790 [ 72.093714] [] ? path_mountpoint+0x6c0/0x6c0 [ 72.099755] [] ? trace_hardirqs_on+0x10/0x10 [ 72.105788] [] do_filp_open+0x197/0x270 [ 72.111389] [] ? may_open_dev+0xe0/0xe0 [ 72.116991] [] ? _raw_spin_unlock+0x2c/0x50 [ 72.122945] [] ? __alloc_fd+0x1d7/0x4a0 [ 72.128562] [] do_sys_open+0x30d/0x5c0 [ 72.134086] [] ? filp_open+0x70/0x70 [ 72.139456] [] ? __might_fault+0x18e/0x1d0 [ 72.145314] [] ? __might_fault+0xe4/0x1d0 [ 72.151090] [] ? SyS_clock_gettime+0x11e/0x1f0 [ 72.157297] [] ? fput+0xd2/0x140 [ 72.162289] [] SyS_creat+0x27/0x30 [ 72.167459] [] ? SyS_openat+0x40/0x40 [ 72.172896] [] do_syscall_64+0x19f/0x550 [ 72.178593] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 72.185867] Kernel Offset: disabled [ 72.189516] Rebooting in 86400 seconds..