[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.952638] 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: [ 20.269243] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.530397] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.274940] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available) [ 31.801360] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts. [ 37.193022] random: sshd: uninitialized urandom read (32 bytes read, 97 bits of entropy available) [ 37.300133] 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 [ 37.347517] sg_write: data in/out 36090/48 bytes for SCSI command 0xe2-- guessing data in; [ 37.347517] program syzkaller523439 not setting count and/or reply_len properly executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.923096] random: nonblocking pool is initialized [ 38.926405] kasan: CONFIG_KASAN_INLINE enabled [ 38.926411] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.926414] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.926418] Dumping ftrace buffer: [ 38.926420] (ftrace buffer empty) [ 38.926422] Modules linked in: [ 38.926427] CPU: 0 PID: 3327 Comm: syzkaller523439 Not tainted 4.4.110-gdac1439 #20 [ 38.926429] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.926432] task: ffff8801d1668000 task.stack: ffff8801d0610000 [ 38.926443] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 38.926445] RSP: 0018:ffff8801d06179f0 EFLAGS: 00010a07 [ 38.926448] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9c5b [ 38.926450] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 38.926452] RBP: ffff8801d0617a00 R08: 0000000048000000 R09: 0000000000001e30 [ 38.926454] R10: 0000000000002100 R11: 1ffff1003a0c2f1c R12: 0000000000000004 [ 38.926457] R13: 0000000000000020 R14: ffff8800aff40000 R15: dffffc0000000000 [ 38.926460] FS: 00000000022d6880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 38.926462] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.926464] CR2: 00000000204d7fa0 CR3: 00000001ccbc8000 CR4: 0000000000160670 [ 38.926469] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.926471] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.926472] Stack: [ 38.926476] 0000000000000246 ffff8800aff40158 ffff8801d0617a60 ffffffff825b9c81 [ 38.926480] ffff8800aff40170 ffffed0015fe802b ffffed0015fe802e ffff8800aff40168 [ 38.926484] dead4ead00000000 ffff8800aff40140 0000000000000000 0000000000000000 [ 38.926485] Call Trace: [ 38.926493] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 38.926497] [] sg_finish_rem_req+0x2b5/0x340 [ 38.926500] [] sg_new_read.isra.18+0x17d/0x3c0 [ 38.926504] [] sg_read+0x8c2/0x1490 [ 38.926511] [] ? __check_object_size+0x154/0x35b [ 38.926515] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 38.926520] [] ? fsnotify+0xee0/0xee0 [ 38.926526] [] ? avc_policy_seqno+0x9/0x20 [ 38.926531] [] do_loop_readv_writev+0x141/0x1e0 [ 38.926535] [] ? security_file_permission+0x89/0x1e0 [ 38.926539] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 38.926543] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 38.926547] [] do_readv_writev+0x5dd/0x6e0 [ 38.926550] [] ? vfs_write+0x530/0x530 [ 38.926556] [] ? _raw_spin_unlock+0x2c/0x50 [ 38.926560] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 38.926565] [] ? handle_mm_fault+0x3f2/0x3190 [ 38.926570] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 38.926573] [] ? __fsnotify_parent+0xbc/0x340 [ 38.926577] [] ? avc_policy_seqno+0x9/0x20 [ 38.926580] [] ? fsnotify+0x5ad/0xee0 [ 38.926584] [] vfs_readv+0x78/0xb0 [ 38.926587] [] SyS_readv+0xd9/0x240 [ 38.926590] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 38.926595] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 38.926598] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 38.926646] 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 [ 38.926650] RIP [] __free_pages+0x21/0x90 [ 38.926651] RSP [ 38.926655] ---[ end trace 711048aa7be463ee ]--- [ 38.926658] Kernel panic - not syncing: Fatal exception [ 39.290181] Dumping ftrace buffer: [ 39.293721] (ftrace buffer empty) [ 39.297403] Kernel Offset: disabled [ 39.300999] Rebooting in 86400 seconds..