[ 17.171034] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.942576] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.298232] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.197287] random: sshd: uninitialized urandom read (32 bytes read, 97 bits of entropy available) [ 28.292646] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. [ 33.680069] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.117047] random: nonblocking pool is initialized [ 35.119038] kasan: CONFIG_KASAN_INLINE enabled [ 35.119045] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.119048] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.119052] Dumping ftrace buffer: [ 35.119054] (ftrace buffer empty) [ 35.119057] Modules linked in: [ 35.119062] CPU: 0 PID: 3325 Comm: syzkaller052841 Not tainted 4.4.113-gef588ef #33 [ 35.119064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.119066] task: ffff8800b55b2f80 task.stack: ffff8801cc8a0000 [ 35.119078] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 35.119080] RSP: 0018:ffff8801cc8a79f0 EFLAGS: 00010a07 [ 35.119082] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b6f2b [ 35.119089] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 35.119091] RBP: ffff8801cc8a7a00 R08: 0000000048000000 R09: 0000000000001e30 [ 35.119093] R10: 0000000000002100 R11: 1ffff10039914f1c R12: 0000000000000004 [ 35.119095] R13: 0000000000000020 R14: ffff8800b8254200 R15: dffffc0000000000 [ 35.119098] FS: 0000000000853940(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 35.119101] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.119103] CR2: 0000000020a13000 CR3: 00000001ccae4000 CR4: 0000000000160670 [ 35.119107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.119109] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.119110] Stack: [ 35.119115] 0000000000000246 ffff8800b8254358 ffff8801cc8a7a60 ffffffff825b6f51 [ 35.119119] ffff8800b8254370 ffffed001704a86b ffffed001704a86e ffff8800b8254368 [ 35.119123] dead4ead00000000 ffff8800b8254340 0000000000000000 0000000000000000 [ 35.119123] Call Trace: [ 35.119132] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 35.119136] [] sg_finish_rem_req+0x2b5/0x340 [ 35.119140] [] sg_new_read.isra.18+0x17d/0x3c0 [ 35.119143] [] sg_read+0x8bc/0x1490 [ 35.119149] [] ? __check_object_size+0x154/0x35b [ 35.119153] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.119158] [] ? fsnotify+0xee0/0xee0 [ 35.119165] [] ? avc_policy_seqno+0x9/0x20 [ 35.119170] [] do_loop_readv_writev+0x141/0x1e0 [ 35.119174] [] ? security_file_permission+0x89/0x1e0 [ 35.119178] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.119182] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.119185] [] do_readv_writev+0x5dd/0x6e0 [ 35.119189] [] ? vfs_write+0x530/0x530 [ 35.119194] [] ? _raw_spin_unlock+0x2c/0x50 [ 35.119198] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 35.119204] [] ? handle_mm_fault+0x3f2/0x3190 [ 35.119210] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.119213] [] ? __fsnotify_parent+0xbc/0x340 [ 35.119217] [] ? avc_policy_seqno+0x9/0x20 [ 35.119220] [] ? fsnotify+0x5ad/0xee0 [ 35.119223] [] vfs_readv+0x78/0xb0 [ 35.119227] [] SyS_readv+0xd9/0x240 [ 35.119230] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 35.119235] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 35.119238] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 35.119288] Code: b6 9f 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 [ 35.119292] RIP [] __free_pages+0x21/0x90 [ 35.119293] RSP [ 35.119298] ---[ end trace c9753855579fe1f4 ]--- [ 35.119300] Kernel panic - not syncing: Fatal exception [ 35.484174] Dumping ftrace buffer: [ 35.487731] (ftrace buffer empty) [ 35.491417] Kernel Offset: disabled [ 35.495013] Rebooting in 86400 seconds..