[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.891229] 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: [ 19.377755] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 19.743535] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [ 20.718750] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) [ 20.897275] random: sshd: uninitialized urandom read (32 bytes read, 121 bits of entropy available) Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. [ 26.271596] random: nonblocking pool is initialized executing program executing program executing program executing program executing program [ 26.394457] 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 [ 26.442255] IPVS: Creating netns size=2552 id=2 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.507762] IPVS: Creating netns size=2552 id=3 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.602118] IPVS: Creating netns size=2552 id=4 [ 26.604995] kasan: CONFIG_KASAN_INLINE enabled [ 26.605004] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.605009] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.605015] Dumping ftrace buffer: [ 26.605019] (ftrace buffer empty) [ 26.605022] Modules linked in: [ 26.605031] CPU: 0 PID: 3334 Comm: syzkaller333639 Not tainted 4.4.113-ge70c132 #34 [ 26.605034] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.605038] task: ffff8800b4ac8000 task.stack: ffff8801cc018000 [ 26.605055] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 26.605059] RSP: 0018:ffff8801cc01f9f0 EFLAGS: 00010a07 [ 26.605063] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b6f2b [ 26.605066] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 26.605069] RBP: ffff8801cc01fa00 R08: 0000000000000001 R09: 0000000000000001 [ 26.605073] R10: 0000000000000000 R11: 1ffff10039803f1c R12: 0000000000000004 [ 26.605076] R13: 0000000000000020 R14: ffff8800b499a100 R15: dffffc0000000000 [ 26.605082] FS: 0000000001a46880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 26.605085] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.605089] CR2: 0000000020adff12 CR3: 00000001d0e12000 CR4: 0000000000160670 [ 26.605095] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.605099] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.605100] Stack: [ 26.605108] ffffffff83772769 ffff8800b499a258 ffff8801cc01fa60 ffffffff825b6f51 [ 26.605115] ffff8800b499a270 ffffed001693344b ffffed001693344e ffff8800b499a268 [ 26.605122] dead4ead00000000 ffff8800b499a240 0000000000000000 0000000000000000 [ 26.605123] Call Trace: [ 26.605134] [] ? retint_kernel+0x2d/0x2d [ 26.605145] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 26.605152] [] sg_finish_rem_req+0x2b5/0x340 [ 26.605159] [] sg_new_read.isra.18+0x336/0x3c0 [ 26.605165] [] sg_read+0x8bc/0x1490 [ 26.605175] [] ? __check_object_size+0x154/0x35b [ 26.605182] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 26.605189] [] ? fsnotify+0xee0/0xee0 [ 26.605199] [] ? avc_policy_seqno+0x9/0x20 [ 26.605206] [] do_loop_readv_writev+0x141/0x1e0 [ 26.605213] [] ? security_file_permission+0x89/0x1e0 [ 26.605220] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 26.605226] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 26.605232] [] do_readv_writev+0x5dd/0x6e0 [ 26.605238] [] ? vfs_write+0x530/0x530 [ 26.605244] [] ? _raw_spin_unlock+0x2c/0x50 [ 26.605250] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 26.605257] [] ? handle_mm_fault+0x3f2/0x3190 [ 26.605265] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 26.605270] [] ? __fsnotify_parent+0xbc/0x340 [ 26.605277] [] ? avc_policy_seqno+0x9/0x20 [ 26.605281] [] ? fsnotify+0x5ad/0xee0 [ 26.605287] [] vfs_readv+0x78/0xb0 [ 26.605292] [] SyS_readv+0xd9/0x240 [ 26.605298] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 26.605306] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 26.605312] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 26.605397] 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 [ 26.605404] RIP [] __free_pages+0x21/0x90 [ 26.605406] RSP [ 26.605412] ---[ end trace dbd35948049f6a88 ]--- [ 26.605417] Kernel panic - not syncing: Fatal exception [ 26.607354] Dumping ftrace buffer: [ 26.607356] (ftrace buffer empty) [ 26.607359] Kernel Offset: disabled [ 26.985811] Rebooting in 86400 seconds..