[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.883649] 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: [ 22.222820] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.580407] random: sshd: uninitialized urandom read (32 bytes read, 40 bits of entropy available) [ 23.599293] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) [ 25.509930] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.286586] kasan: CONFIG_KASAN_INLINE enabled [ 41.290929] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.290943] Dumping ftrace buffer: [ 41.290946] (ftrace buffer empty) [ 41.290947] Modules linked in: [ 41.290953] CPU: 1 PID: 3325 Comm: syzkaller708025 Not tainted 4.4.107-g610c835 #12 [ 41.290955] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.290958] task: ffff8800b4baaf80 task.stack: ffff8801d93a0000 [ 41.290960] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 41.290971] RSP: 0018:ffff8801d93a79f0 EFLAGS: 00010a07 [ 41.290974] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 41.290976] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 41.290978] RBP: ffff8801d93a7a00 R08: 0000000000000001 R09: 0000000000000000 [ 41.290980] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 41.290982] R13: 0000000000000020 R14: ffff8801cb0e0000 R15: dffffc0000000000 [ 41.290986] FS: 0000000001476880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 41.290988] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.290990] CR2: 0000000020a77fc0 CR3: 00000001d2ac3000 CR4: 00000000001406e0 [ 41.290994] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.290996] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.290997] Stack: [ 41.290998] 0000000000000000 ffff8801cb0e0158 ffff8801d93a7a60 ffffffff825b8cf1 [ 41.291003] ffff8801cb0e0170 ffffed003961c02b ffffed003961c02e ffff8801cb0e0168 [ 41.291007] dead4ead00000000 ffff8801cb0e0140 0000000000000000 0000000000000000 [ 41.291012] Call Trace: [ 41.291019] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 41.291023] [] sg_finish_rem_req+0x2b5/0x340 [ 41.291027] [] sg_new_read.isra.18+0x39/0x3c0 [ 41.291031] [] ? sg_get_rq_mark+0x142/0x190 [ 41.291035] [] sg_read+0x8c2/0x1490 [ 41.291041] [] ? __check_object_size+0x154/0x35b [ 41.291045] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 41.291048] [] ? fsnotify+0xee0/0xee0 [ 41.291055] [] ? avc_policy_seqno+0x9/0x20 [ 41.291060] [] do_loop_readv_writev+0x141/0x1e0 [ 41.291064] [] ? security_file_permission+0x89/0x1e0 [ 41.291067] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 41.291071] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 41.291075] [] do_readv_writev+0x5dd/0x6e0 [ 41.291079] [] ? vfs_write+0x530/0x530 [ 41.291084] [] ? _raw_spin_unlock+0x2c/0x50 [ 41.291088] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 41.291094] [] ? handle_mm_fault+0x3f2/0x3190 [ 41.291100] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 41.291103] [] ? __fsnotify_parent+0xbc/0x340 [ 41.291107] [] ? avc_policy_seqno+0x9/0x20 [ 41.291110] [] ? fsnotify+0x5ad/0xee0 [ 41.291114] [] vfs_readv+0x78/0xb0 [ 41.291117] [] SyS_readv+0xd9/0x240 [ 41.291120] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 41.291125] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 41.291129] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 41.291130] 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 [ 41.291190] RIP [] __free_pages+0x21/0x90 [ 41.291194] RSP [ 41.291198] ---[ end trace 1482aaf621d484a9 ]--- [ 41.291201] Kernel panic - not syncing: Fatal exception [ 41.291815] Dumping ftrace buffer: [ 41.291816] (ftrace buffer empty) [ 41.291818] Kernel Offset: disabled [ 41.690962] Rebooting in 86400 seconds..