[ 15.715621] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.767564] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.039837] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.836893] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 29.048754] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.15.234' (ECDSA) to the list of known hosts. [ 34.452519] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.617050] audit: type=1400 audit(1514899932.360:5): avc: denied { module_load } for pid=3342 comm="syzkaller035019" path="/dev/sg0" dev="devtmpfs" ino=6408 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:scsi_generic_device_t:s0 tclass=system permissive=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 [ 36.316429] random: nonblocking pool is initialized [ 36.317884] kasan: CONFIG_KASAN_INLINE enabled [ 36.317890] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.317893] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.317897] Dumping ftrace buffer: [ 36.317900] (ftrace buffer empty) [ 36.317902] Modules linked in: [ 36.317911] CPU: 1 PID: 3798 Comm: syzkaller035019 Not tainted 4.4.107-g610c835 #12 [ 36.317913] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.317916] task: ffff8800b419c740 task.stack: ffff8800b31d0000 [ 36.317926] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 36.317929] RSP: 0018:ffff8800b31d79f0 EFLAGS: 00010a07 [ 36.317931] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 36.317934] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 36.317936] RBP: ffff8800b31d7a00 R08: 0000000000000001 R09: 0000000000000000 [ 36.317938] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 36.317940] R13: 0000000000000020 R14: ffff8800b30b0000 R15: dffffc0000000000 [ 36.317943] FS: 0000000000fbe940(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 36.317945] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.317947] CR2: 000000002069b000 CR3: 00000000b4480000 CR4: 00000000001406e0 [ 36.317951] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.317953] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.317954] Stack: [ 36.317959] 0000000000000000 ffff8800b30b0158 ffff8800b31d7a60 ffffffff825b8cf1 [ 36.317963] ffff8800b30b0170 ffffed001661602b ffffed001661602e ffff8800b30b0168 [ 36.317967] dead4ead00000000 ffff8800b30b0140 0000000000000000 0000000000000000 [ 36.317968] Call Trace: [ 36.317976] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 36.317980] [] sg_finish_rem_req+0x2b5/0x340 [ 36.317984] [] sg_new_read.isra.18+0x39/0x3c0 [ 36.317987] [] ? sg_get_rq_mark+0x142/0x190 [ 36.317991] [] sg_read+0x8c2/0x1490 [ 36.317997] [] ? __check_object_size+0x154/0x35b [ 36.318001] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 36.318005] [] ? fsnotify+0xee0/0xee0 [ 36.318012] [] ? avc_policy_seqno+0x9/0x20 [ 36.318017] [] do_loop_readv_writev+0x141/0x1e0 [ 36.318021] [] ? security_file_permission+0x89/0x1e0 [ 36.318025] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 36.318029] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 36.318032] [] do_readv_writev+0x5dd/0x6e0 [ 36.318036] [] ? vfs_write+0x530/0x530 [ 36.318040] [] ? _raw_spin_unlock+0x2c/0x50 [ 36.318044] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 36.318049] [] ? handle_mm_fault+0x3f2/0x3190 [ 36.318054] [] ? show_initstate+0xb0/0xb0 [ 36.318058] [] ? __fsnotify_parent+0xbc/0x340 [ 36.318061] [] ? avc_policy_seqno+0x9/0x20 [ 36.318064] [] ? fsnotify+0x5ad/0xee0 [ 36.318068] [] vfs_readv+0x78/0xb0 [ 36.318071] [] SyS_readv+0xd9/0x240 [ 36.318075] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 36.318079] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 36.318083] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 36.318134] 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 [ 36.318138] RIP [] __free_pages+0x21/0x90 [ 36.318139] RSP [ 36.318143] ---[ end trace 6bab79e97ca0c44d ]--- [ 36.318146] Kernel panic - not syncing: Fatal exception [ 36.688111] Dumping ftrace buffer: [ 36.691650] (ftrace buffer empty) [ 36.695326] Kernel Offset: disabled [ 36.698924] Rebooting in 86400 seconds..