[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.837963] 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: [ 20.619730] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.997245] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.741393] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available) [ 21.912251] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available) Warning: Permanently added '10.128.15.223' (ECDSA) to the list of known hosts. [ 27.281601] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 27.518542] IPVS: Creating netns size=2552 id=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 27.572499] sg_write: data in/out 262109/104 bytes for SCSI command 0x1-- guessing data in; [ 27.572499] program syzkaller738076 not setting count and/or reply_len properly executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.000312] random: nonblocking pool is initialized [ 31.001673] kasan: CONFIG_KASAN_INLINE enabled [ 31.001680] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.001684] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 31.001689] Dumping ftrace buffer: [ 31.001692] (ftrace buffer empty) [ 31.001695] Modules linked in: [ 31.001702] CPU: 0 PID: 4195 Comm: syzkaller738076 Not tainted 4.4.107-g610c835 #4 [ 31.001705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.001709] task: ffff8801ccfa0000 task.stack: ffff8801ce2e8000 [ 31.001723] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 31.001726] RSP: 0018:ffff8801ce2ef970 EFLAGS: 00010a07 [ 31.001730] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 31.001734] RDX: 1bd5a9d5a0000003 RSI: 0000000000000008 RDI: dead4ead0000001c [ 31.001737] RBP: ffff8801ce2ef980 R08: 0000000000000001 R09: 0000000000000000 [ 31.001740] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 31.001744] R13: 0000000000000020 R14: ffff8801cd622100 R15: dffffc0000000000 [ 31.001749] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009f7e840 [ 31.001752] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 31.001756] CR2: 00000000204f2000 CR3: 00000001ce035000 CR4: 00000000001406f0 [ 31.001761] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.001765] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.001766] Stack: [ 31.001774] 0000000000000000 ffff8801cd622258 ffff8801ce2ef9e0 ffffffff825b8cf1 [ 31.001781] ffff8801cd622270 ffffed0039ac444b ffffed0039ac444e ffff8801cd622268 [ 31.001787] dead4ead00000000 ffff8801cd622240 0000000000000000 0000000000000000 [ 31.001789] Call Trace: [ 31.001799] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 31.001806] [] sg_finish_rem_req+0x2b5/0x340 [ 31.001812] [] sg_new_read.isra.18+0x39/0x3c0 [ 31.001818] [] ? sg_get_rq_mark+0x142/0x190 [ 31.001824] [] sg_read+0x8c2/0x1490 [ 31.001831] [] ? __kmalloc+0x124/0x320 [ 31.001838] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 31.001844] [] ? fsnotify+0xee0/0xee0 [ 31.001853] [] ? avc_policy_seqno+0x9/0x20 [ 31.001861] [] do_loop_readv_writev+0x141/0x1e0 [ 31.001868] [] ? security_file_permission+0x89/0x1e0 [ 31.001874] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 31.001881] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 31.001887] [] compat_do_readv_writev+0x5df/0x6e0 [ 31.001893] [] ? vfs_writev+0xb0/0xb0 [ 31.001901] [] ? _raw_spin_unlock+0x2c/0x50 [ 31.001907] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 31.001914] [] ? handle_mm_fault+0x3f2/0x3190 [ 31.001920] [] ? rw_verify_area+0x100/0x2f0 [ 31.001927] [] compat_readv+0xd9/0x140 [ 31.001933] [] compat_SyS_readv+0xd8/0x1b0 [ 31.001938] [] ? SyS_pwritev+0x230/0x230 [ 31.001945] [] ? do_fast_syscall_32+0xd7/0x890 [ 31.001950] [] ? SyS_pwritev+0x230/0x230 [ 31.001956] [] do_fast_syscall_32+0x314/0x890 [ 31.001962] [] sysenter_flags_fixed+0xd/0x17 [ 31.002049] Code: 76 ae 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 [ 31.002055] RIP [] __free_pages+0x21/0x90 [ 31.002057] RSP [ 31.002062] ---[ end trace e2d303966b24ccba ]--- [ 31.002066] Kernel panic - not syncing: Fatal exception [ 31.365313] Dumping ftrace buffer: [ 31.368826] (ftrace buffer empty) [ 31.372498] Kernel Offset: disabled [ 31.376088] Rebooting in 86400 seconds..