[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.433672] 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: [ 25.475312] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 25.917176] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 26.781659] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) [ 26.943164] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. [ 32.295795] random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available) [ 32.388255] 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 [ 32.908714] random: nonblocking pool is initialized executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.458566] kasan: CONFIG_KASAN_INLINE enabled [ 35.463010] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.476066] Dumping ftrace buffer: [ 35.479589] (ftrace buffer empty) [ 35.483272] Modules linked in: [ 35.486560] CPU: 1 PID: 5019 Comm: syzkaller701614 Not tainted 4.4.115-g0e9bcc1 #11 [ 35.494324] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.503654] task: ffff8801d96b3000 task.stack: ffff8801d6cf8000 [ 35.509683] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 35.517925] RSP: 0018:ffff8801d6cff9f0 EFLAGS: 00010a07 [ 35.523346] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b872b [ 35.530601] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 35.537844] RBP: ffff8801d6cffa00 R08: 0000000048000000 R09: 0000000000001e30 [ 35.545091] R10: 0000000000002100 R11: 1ffff1003ad9ff1c R12: 0000000000000004 [ 35.552334] R13: 0000000000000020 R14: ffff8800b94ba100 R15: dffffc0000000000 [ 35.559577] FS: 00007f22d0c6d700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 35.567785] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.573638] CR2: 0000000020a13000 CR3: 00000001cda22000 CR4: 0000000000160670 [ 35.580882] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.588132] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.595375] Stack: [ 35.597497] 0000000000000246 ffff8800b94ba258 ffff8801d6cffa60 ffffffff825b8751 [ 35.605511] ffff8800b94ba270 ffffed001729744b ffffed001729744e ffff8800b94ba268 [ 35.613505] dead4ead00000000 ffff8800b94ba240 0000000000000000 0000000000000000 [ 35.621486] Call Trace: [ 35.624066] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 35.630551] [] sg_finish_rem_req+0x2b5/0x340 [ 35.636582] [] sg_new_read.isra.18+0x17d/0x3c0 [ 35.642795] [] sg_read+0x8bc/0x1490 [ 35.648056] [] ? __check_object_size+0x154/0x35b [ 35.654438] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.661093] [] ? fsnotify+0xee0/0xee0 [ 35.666519] [] ? avc_policy_seqno+0x9/0x20 [ 35.672389] [] do_loop_readv_writev+0x141/0x1e0 [ 35.678692] [] ? security_file_permission+0x89/0x1e0 [ 35.685418] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.692057] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 35.699058] [] do_readv_writev+0x5dd/0x6e0 [ 35.705621] [] ? vfs_write+0x530/0x530 [ 35.711130] [] ? _raw_spin_unlock+0x2c/0x50 [ 35.717081] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 35.724066] [] ? __fget+0x20b/0x3b0 [ 35.729314] [] ? __fget+0x232/0x3b0 [ 35.734562] [] ? __fget+0x47/0x3b0 [ 35.739722] [] vfs_readv+0x78/0xb0 [ 35.744886] [] SyS_readv+0xd9/0x240 [ 35.750141] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 35.756694] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 35.763250] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 35.769800] Code: c6 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 [ 35.796686] RIP [] __free_pages+0x21/0x90 [ 35.802584] RSP [ 35.806372] ---[ end trace 4c833954bc09afce ]--- [ 35.811118] Kernel panic - not syncing: Fatal exception [ 35.817019] Dumping ftrace buffer: [ 35.820541] (ftrace buffer empty) [ 35.824225] Kernel Offset: disabled [ 35.827828] Rebooting in 86400 seconds..