[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.233748] 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: [ 21.009527] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.249811] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.046470] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 36.822837] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. [ 42.217611] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) [ 42.316277] 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 [ 43.316369] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 44.983981] kasan: CONFIG_KASAN_INLINE enabled [ 44.988888] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.002017] Dumping ftrace buffer: [ 45.005522] (ftrace buffer empty) [ 45.009201] Modules linked in: [ 45.012476] CPU: 0 PID: 4006 Comm: syzkaller208660 Not tainted 4.4.107-g610c835 #12 [ 45.020232] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.029575] task: ffff8801cee15f00 task.stack: ffff8801cf960000 [ 45.036031] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 45.044260] RSP: 0018:ffff8801cf9679f0 EFLAGS: 00010a07 [ 45.049673] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 45.056911] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 45.064152] RBP: ffff8801cf967a00 R08: 0000000000000001 R09: 0000000000000000 [ 45.071389] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 45.078625] R13: 0000000000000020 R14: ffff8800b24a0000 R15: dffffc0000000000 [ 45.085862] FS: 0000000000eff880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 45.094067] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.099914] CR2: 0000000020487000 CR3: 00000001cf93a000 CR4: 00000000001406f0 [ 45.107154] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.114390] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.121626] Stack: [ 45.123741] 0000000000000000 ffff8800b24a0158 ffff8801cf967a60 ffffffff825b8cf1 [ 45.131694] ffff8800b24a0170 ffffed001649402b ffffed001649402e ffff8800b24a0168 [ 45.139646] dead4ead00000000 ffff8800b24a0140 0000000000000000 0000000000000000 [ 45.147603] Call Trace: [ 45.150161] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 45.156634] [] sg_finish_rem_req+0x2b5/0x340 [ 45.162657] [] sg_new_read.isra.18+0x39/0x3c0 [ 45.168766] [] ? sg_get_rq_mark+0x142/0x190 [ 45.174703] [] sg_read+0x8c2/0x1490 [ 45.179945] [] ? __check_object_size+0x154/0x35b [ 45.186315] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 45.192954] [] ? fsnotify+0xee0/0xee0 [ 45.198382] [] ? avc_policy_seqno+0x9/0x20 [ 45.204239] [] do_loop_readv_writev+0x141/0x1e0 [ 45.210524] [] ? security_file_permission+0x89/0x1e0 [ 45.217244] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 45.223887] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 45.230537] [] do_readv_writev+0x5dd/0x6e0 [ 45.236405] [] ? vfs_write+0x530/0x530 [ 45.241911] [] ? _raw_spin_unlock+0x2c/0x50 [ 45.247855] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 45.255446] [] ? handle_mm_fault+0x3f2/0x3190 [ 45.261558] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 45.268366] [] vfs_readv+0x78/0xb0 [ 45.273531] [] SyS_readv+0xd9/0x240 [ 45.278783] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 45.285336] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 45.291881] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 45.298424] 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 [ 45.324980] RIP [] __free_pages+0x21/0x90 [ 45.330857] RSP [ 45.334557] ---[ end trace 4500c0f4d5c776d4 ]--- [ 45.339281] Kernel panic - not syncing: Fatal exception [ 45.344644] Dumping ftrace buffer: [ 45.348153] (ftrace buffer empty) [ 45.351835] Kernel Offset: disabled [ 45.355427] Rebooting in 86400 seconds..