Starting mcstransd: [ 21.308149] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.248571] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 25.617680] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 26.568104] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. [ 32.320851] kasan: CONFIG_KASAN_INLINE enabled [ 32.324821] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.324840] Dumping ftrace buffer: [ 32.324843] (ftrace buffer empty) [ 32.324845] Modules linked in: [ 32.324853] CPU: 0 PID: 3801 Comm: syzkaller787287 Not tainted 4.4.120-gd63fdf6 #28 [ 32.324856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.324860] task: ffff8800a9a01800 task.stack: ffff8800bad30000 [ 32.324863] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 32.324877] RSP: 0018:ffff8800bad379f0 EFLAGS: 00010a07 [ 32.324881] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b85eb [ 32.324884] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 32.324888] RBP: ffff8800bad37a00 R08: 0000000048000000 R09: 0000000000001e30 [ 32.324891] R10: 0000000000002100 R11: 1ffff100175a6f1c R12: 0000000000000004 [ 32.324895] R13: 0000000000000020 R14: ffff8801d49d0000 R15: dffffc0000000000 [ 32.324900] FS: 00007fc14ed77700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.324903] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.324907] CR2: 000000002085dff0 CR3: 00000000bb3dc000 CR4: 0000000000160670 [ 32.324913] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.324917] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.324918] Stack: [ 32.324920] 0000000000000246 ffff8801d49d0158 ffff8800bad37a60 ffffffff825b8611 [ 32.324928] ffff8801d49d0170 ffffed003a93a02b ffffed003a93a02e ffff8801d49d0168 [ 32.324936] dead4ead00000000 ffff8801d49d0140 0000000000000000 0000000000000000 [ 32.324943] Call Trace: [ 32.324954] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 32.324961] [] sg_finish_rem_req+0x2b5/0x340 [ 32.324967] [] sg_new_read.isra.18+0x17d/0x3c0 [ 32.324973] [] sg_read+0x8bc/0x1490 [ 32.324981] [] ? __check_object_size+0x154/0x35b [ 32.324988] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.324995] [] ? fsnotify+0xee0/0xee0 [ 32.325003] [] ? avc_policy_seqno+0x9/0x20 [ 32.325011] [] do_loop_readv_writev+0x141/0x1e0 [ 32.325017] [] ? security_file_permission+0x89/0x1e0 [ 32.325024] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.325030] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 32.325035] [] do_readv_writev+0x5dd/0x6e0 [ 32.325040] [] ? vfs_write+0x530/0x530 [ 32.325046] [] ? _raw_spin_unlock+0x2c/0x50 [ 32.325053] [] ? __fget+0x213/0x3b0 [ 32.325058] [] ? __fget+0x23a/0x3b0 [ 32.325063] [] ? __fget+0x47/0x3b0 [ 32.325068] [] vfs_readv+0x78/0xb0 [ 32.325074] [] SyS_readv+0xd9/0x240 [ 32.325079] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 32.325086] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 32.325092] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 32.325094] Code: c6 a0 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 [ 32.325194] RIP [] __free_pages+0x21/0x90 [ 32.325201] RSP [ 32.325207] ---[ end trace 2faa07f2f6c6515b ]--- [ 32.325211] Kernel panic - not syncing: Fatal exception [ 32.325701] Dumping ftrace buffer: [ 32.325703] (ftrace buffer empty) [ 32.325705] Kernel Offset: disabled [ 32.683479] Rebooting in 86400 seconds..