[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.693709] 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: [ 21.452928] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.836080] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.650658] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 33.064713] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. [ 38.460998] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) executing program executing program executing program executing program executing program executing program [ 38.557195] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 40.359209] random: nonblocking pool is initialized executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.069019] kasan: CONFIG_KASAN_INLINE enabled [ 41.073680] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.086496] Dumping ftrace buffer: [ 41.090009] (ftrace buffer empty) [ 41.093687] Modules linked in: [ 41.096984] CPU: 1 PID: 4034 Comm: syzkaller342899 Not tainted 4.4.107-g610c835 #4 [ 41.104662] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.113983] task: ffff8801cfb9c740 task.stack: ffff8800b5ae8000 [ 41.120004] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 41.128233] RSP: 0018:ffff8800b5aef970 EFLAGS: 00010a07 [ 41.133648] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 41.140886] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 41.148208] RBP: ffff8800b5aef980 R08: 0000000000000001 R09: 0000000000000000 [ 41.155445] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 41.162767] R13: 0000000000000020 R14: ffff8801cfa78000 R15: dffffc0000000000 [ 41.170003] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000834a840 [ 41.178196] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 41.184054] CR2: 0000000020c8d000 CR3: 00000000b2d22000 CR4: 00000000001406e0 [ 41.191292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.198529] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.205765] Stack: [ 41.207876] 0000000000000000 ffff8801cfa78158 ffff8800b5aef9e0 ffffffff825b8cf1 [ 41.215850] ffff8801cfa78170 ffffed0039f4f02b ffffed0039f4f02e ffff8801cfa78168 [ 41.223804] dead4ead00000000 ffff8801cfa78140 0000000000000000 0000000000000000 [ 41.231748] Call Trace: [ 41.234302] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 41.240760] [] sg_finish_rem_req+0x2b5/0x340 [ 41.246783] [] sg_new_read.isra.18+0x39/0x3c0 [ 41.252894] [] ? sg_get_rq_mark+0x142/0x190 [ 41.259193] [] sg_read+0x8c2/0x1490 [ 41.264436] [] ? mark_held_locks+0xaf/0x100 [ 41.270370] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 41.277001] [] ? fsnotify+0xee0/0xee0 [ 41.282420] [] ? avc_policy_seqno+0x9/0x20 [ 41.288271] [] do_loop_readv_writev+0x141/0x1e0 [ 41.294555] [] ? security_file_permission+0x89/0x1e0 [ 41.301274] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 41.307907] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 41.314540] [] compat_do_readv_writev+0x5df/0x6e0 [ 41.320997] [] ? vfs_writev+0xb0/0xb0 [ 41.326503] [] ? _raw_spin_unlock+0x2c/0x50 [ 41.332443] [] ? handle_mm_fault+0x3f2/0x3190 [ 41.338554] [] ? rw_verify_area+0x100/0x2f0 [ 41.344492] [] compat_readv+0xd9/0x140 [ 41.350003] [] compat_SyS_readv+0xd8/0x1b0 [ 41.355860] [] ? SyS_pwritev+0x230/0x230 [ 41.361538] [] ? do_fast_syscall_32+0xd7/0x890 [ 41.367733] [] ? SyS_pwritev+0x230/0x230 [ 41.373408] [] do_fast_syscall_32+0x314/0x890 [ 41.379519] [] sysenter_flags_fixed+0xd/0x17 [ 41.385540] 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 [ 41.411922] RIP [] __free_pages+0x21/0x90 [ 41.417798] RSP [ 41.422012] ---[ end trace ce1f80fdb3afa8f8 ]--- [ 41.426852] Kernel panic - not syncing: Fatal exception [ 41.432567] Dumping ftrace buffer: [ 41.436072] (ftrace buffer empty) [ 41.439750] Kernel Offset: disabled [ 41.443344] Rebooting in 86400 seconds..