[ 20.889036] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.168276] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 25.545067] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 26.492090] random: sshd: uninitialized urandom read (32 bytes read, 118 bits of entropy available) [ 34.814280] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) Warning: Permanently added '10.128.0.55' (ECDSA) to the list of known hosts. [ 40.276920] random: nonblocking pool is initialized 2018/03/04 19:20:33 parsed 1 programs 2018/03/04 19:20:33 executed programs: 0 [ 40.627735] IPVS: Creating netns size=2552 id=1 [ 40.653228] IPVS: Creating netns size=2552 id=2 [ 40.699180] IPVS: Creating netns size=2552 id=3 [ 40.751719] IPVS: Creating netns size=2552 id=4 [ 40.806508] IPVS: Creating netns size=2552 id=5 [ 40.833952] IPVS: Creating netns size=2552 id=6 [ 40.874778] IPVS: Creating netns size=2552 id=7 [ 40.924750] IPVS: Creating netns size=2552 id=8 2018/03/04 19:20:38 executed programs: 734 2018/03/04 19:20:43 executed programs: 1377 [ 51.992419] ------------[ cut here ]------------ [ 51.998669] WARNING: CPU: 1 PID: 6960 at arch/x86/mm/pat.c:1003 untrack_pfn+0x204/0x2a0() [ 52.032969] Kernel panic - not syncing: panic_on_warn set ... [ 52.032969] [ 52.040358] CPU: 1 PID: 6960 Comm: syz-executor5 Not tainted 4.4.119-g855ea74 #28 [ 52.047958] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.057299] 0000000000000000 28516d61f1af0f74 ffff8801caa67700 ffffffff81d0402d [ 52.065321] ffffffff83843b40 ffff8801caa677d8 ffffffff8383da60 0000000000000009 [ 52.073342] 00000000000003eb ffff8801caa677c8 ffffffff8141aaea 0000000041b58ab3 [ 52.081394] Call Trace: [ 52.083976] [] dump_stack+0xc1/0x124 [ 52.089330] [] panic+0x1aa/0x388 [ 52.094331] [] ? percpu_up_read.constprop.45+0xe1/0xe1 [ 52.101246] [] ? pm_qos_get_value.part.4+0xb/0xb [ 52.107629] [] ? warn_slowpath_common+0x10a/0x140 [ 52.114089] [] warn_slowpath_common+0x125/0x140 [ 52.120382] [] ? untrack_pfn+0x204/0x2a0 [ 52.126068] [] warn_slowpath_null+0x29/0x30 [ 52.132008] [] untrack_pfn+0x204/0x2a0 [ 52.137515] [] ? track_pfn_insert+0x110/0x110 [ 52.143630] [] ? depot_save_stack+0x1c3/0x640 [ 52.149743] [] unmap_single_vma+0xf81/0x12a0 [ 52.155769] [] ? SyS_mremap+0xb8b/0xe60 [ 52.161362] [] ? do_fast_syscall_32+0x321/0x8a0 [ 52.167651] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 52.174633] [] ? vm_normal_page+0x200/0x200 [ 52.180573] [] unmap_vmas+0x81/0xd0 [ 52.185819] [] unmap_region+0x1ad/0x330 [ 52.191411] [] ? __vma_link_file+0x160/0x160 [ 52.197438] [] ? flush_tlb_mm_range+0x10f/0x560 [ 52.203724] [] ? vma_compute_subtree_gap+0x190/0x200 [ 52.210445] [] ? vma_rb_erase+0x60a/0x9f0 [ 52.216210] [] do_munmap+0x70f/0xec0 [ 52.221541] [] move_vma+0x511/0x9b0 [ 52.226788] [] ? move_page_tables+0xe20/0xe20 [ 52.232902] [] ? selinux_mmap_addr+0x1f/0xf0 [ 52.238929] [] ? security_mmap_addr+0x79/0xa0 [ 52.245041] [] ? get_unmapped_area+0x271/0x2f0 [ 52.251242] [] SyS_mremap+0xb8b/0xe60 [ 52.256660] [] ? move_vma+0x9b0/0x9b0 [ 52.262078] [] ? do_fast_syscall_32+0xd7/0x8a0 [ 52.268278] [] ? move_vma+0x9b0/0x9b0 [ 52.273695] [] do_fast_syscall_32+0x321/0x8a0 [ 52.279810] [] sysenter_flags_fixed+0xd/0x17 [ 52.286379] Dumping ftrace buffer: [ 52.289952] (ftrace buffer empty) [ 52.293633] Kernel Offset: disabled [ 52.297260] Rebooting in 86400 seconds..