[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting O[ 20.884550] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) penBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.764811] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 26.015016] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 26.921338] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) [ 42.835666] random: sshd: uninitialized urandom read (32 bytes read, 126 bits of entropy available) [ 46.351500] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. [ 48.345346] IPVS: Creating netns size=2552 id=1 [ 48.368167] IPVS: Creating netns size=2552 id=2 [ 48.390718] IPVS: Creating netns size=2552 id=3 [ 48.414101] IPVS: Creating netns size=2552 id=4 [ 48.415020] kasan: CONFIG_KASAN_INLINE enabled [ 48.415026] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.415028] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.415032] Dumping ftrace buffer: [ 48.415034] (ftrace buffer empty) [ 48.415036] Modules linked in: [ 48.415041] CPU: 1 PID: 3782 Comm: syzkaller203384 Not tainted 4.4.118-g5f7f76a #24 [ 48.415044] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.415046] task: ffff8801d8cf6000 task.stack: ffff8800aee60000 [ 48.415057] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 48.415059] RSP: 0018:ffff8800aee679f0 EFLAGS: 00010a07 [ 48.415061] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b855b [ 48.415064] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 48.415066] RBP: ffff8800aee67a00 R08: 0000000048000000 R09: 0000000000001e30 [ 48.415068] R10: 0000000000002100 R11: 1ffff10015dccf1c R12: 0000000000000004 [ 48.415070] R13: 0000000000000020 R14: ffff8801d90fa100 R15: dffffc0000000000 [ 48.415073] FS: 000000000081f880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 48.415076] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.415078] CR2: 0000000020e94000 CR3: 00000000aedf8000 CR4: 0000000000160670 [ 48.415083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.415085] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.415085] Stack: [ 48.415090] 0000000000000246 ffff8801d90fa258 ffff8800aee67a60 ffffffff825b8581 [ 48.415094] ffff8801d90fa270 ffffed003b21f44b ffffed003b21f44e ffff8801d90fa268 [ 48.415098] dead4ead00000000 ffff8801d90fa240 0000000000000000 0000000000000000 [ 48.415099] Call Trace: [ 48.415107] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 48.415111] [] sg_finish_rem_req+0x2b5/0x340 [ 48.415115] [] sg_new_read.isra.18+0x17d/0x3c0 [ 48.415118] [] sg_read+0x8bc/0x1490 [ 48.415124] [] ? __check_object_size+0x154/0x35b [ 48.415128] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 48.415132] [] ? fsnotify+0xee0/0xee0 [ 48.415138] [] ? avc_policy_seqno+0x9/0x20 [ 48.415143] [] do_loop_readv_writev+0x141/0x1e0 [ 48.415147] [] ? security_file_permission+0x89/0x1e0 [ 48.415151] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 48.415154] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 48.415157] [] do_readv_writev+0x5dd/0x6e0 [ 48.415160] [] ? vfs_write+0x530/0x530 [ 48.415164] [] ? sg_ioctl+0x29f0/0x29f0 [ 48.415167] [] ? __vfs_write+0x10b/0x450 [ 48.415170] [] ? quarantine_put+0xab/0x180 [ 48.415174] [] ? putname+0xee/0x130 [ 48.415177] [] ? __fsnotify_parent+0xbc/0x340 [ 48.415181] [] ? avc_policy_seqno+0x9/0x20 [ 48.415184] [] ? fsnotify+0x5ad/0xee0 [ 48.415187] [] ? fsnotify+0xee0/0xee0 [ 48.415190] [] ? rw_verify_area+0x100/0x2f0 [ 48.415192] [] vfs_readv+0x78/0xb0 [ 48.415195] [] SyS_readv+0xd9/0x240 [ 48.415199] [] ? rw_copy_check_uvector+0x2b0/0x2b0 [ 48.415203] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 48.415208] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 48.415256] Code: c6 a0 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 [ 48.415260] RIP [] __free_pages+0x21/0x90 [ 48.415261] RSP [ 48.415278] ---[ end trace 961c604f4632803f ]--- [ 48.415281] Kernel panic - not syncing: Fatal exception [ 48.419114] Dumping ftrace buffer: [ 48.419116] (ftrace buffer empty) [ 48.419118] Kernel Offset: disabled [ 48.799678] Rebooting in 86400 seconds..