[ 15.796934] 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: [ 21.256589] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.485445] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.428629] random: sshd: uninitialized urandom read (32 bytes read, 118 bits of entropy available) [ 41.392191] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.8' (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 [ 55.170409] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 55.674386] kasan: CONFIG_KASAN_INLINE enabled [ 55.678798] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.691743] Dumping ftrace buffer: [ 55.695247] (ftrace buffer empty) [ 55.698922] Modules linked in: [ 55.702194] CPU: 1 PID: 3329 Comm: syzkaller621086 Not tainted 4.4.110-g618a510 #22 [ 55.709948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.719266] task: ffff8801d0dfaf80 task.stack: ffff8800b4a00000 [ 55.725286] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 55.733510] RSP: 0018:ffff8800b4a079f0 EFLAGS: 00010a07 [ 55.738920] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9c5b [ 55.746154] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 55.753387] RBP: ffff8800b4a07a00 R08: 0000000000000001 R09: 0000000000000001 [ 55.760621] R10: 0000000000000000 R11: 1ffff10016940f1c R12: 0000000000000004 [ 55.767858] R13: 0000000000000020 R14: ffff8800b39da100 R15: dffffc0000000000 [ 55.775095] FS: 00000000012f2940(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 55.783284] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.789129] CR2: 0000000020dc8000 CR3: 00000000b46dc000 CR4: 0000000000160670 [ 55.796373] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.803623] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.810860] Stack: [ 55.812972] ffffffff83776229 ffff8800b39da258 ffff8800b4a07a60 ffffffff825b9c81 [ 55.820920] ffff8800b39da270 ffffed001673b44b ffffed001673b44e ffff8800b39da268 [ 55.828858] dead4ead00000000 ffff8800b39da240 0000000000000000 0000000000000000 [ 55.836809] Call Trace: [ 55.839360] [] ? retint_kernel+0x2d/0x2d [ 55.845035] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 55.851491] [] sg_finish_rem_req+0x2b5/0x340 [ 55.857521] [] sg_new_read.isra.18+0x336/0x3c0 [ 55.863717] [] sg_read+0x8c2/0x1490 [ 55.868964] [] ? __check_object_size+0x154/0x35b [ 55.875336] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 55.881975] [] ? fsnotify+0xee0/0xee0 [ 55.887392] [] ? avc_policy_seqno+0x9/0x20 [ 55.893251] [] do_loop_readv_writev+0x141/0x1e0 [ 55.899535] [] ? security_file_permission+0x89/0x1e0 [ 55.906260] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 55.912892] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 55.919528] [] do_readv_writev+0x5dd/0x6e0 [ 55.925384] [] ? vfs_write+0x530/0x530 [ 55.930885] [] ? _raw_spin_unlock+0x2c/0x50 [ 55.936820] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 55.943808] [] ? handle_mm_fault+0x3f2/0x3190 [ 55.949918] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 55.956721] [] ? __fsnotify_parent+0xbc/0x340 [ 55.962832] [] ? avc_policy_seqno+0x9/0x20 [ 55.968678] [] ? fsnotify+0x5ad/0xee0 [ 55.974117] [] vfs_readv+0x78/0xb0 [ 55.979276] [] SyS_readv+0xd9/0x240 [ 55.984517] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 55.991066] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 55.997611] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 56.004152] Code: 96 a4 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 [ 56.030463] RIP [] __free_pages+0x21/0x90 [ 56.036337] RSP [ 56.043772] ---[ end trace ebf1342eedb0ff39 ]--- [ 56.048507] Kernel panic - not syncing: Fatal exception [ 56.054226] Dumping ftrace buffer: [ 56.057736] (ftrace buffer empty) [ 56.061414] Kernel Offset: disabled [ 56.065005] Rebooting in 86400 seconds..