INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.593851] kasan: CONFIG_KASAN_INLINE enabled [ 27.598427] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.605804] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.612004] Dumping ftrace buffer: [ 27.615510] (ftrace buffer empty) [ 27.619189] Modules linked in: [ 27.622465] CPU: 0 PID: 3685 Comm: syzkaller793182 Not tainted 4.9.91-gcc88c05 #69 [ 27.630134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.639453] task: ffff8801c11be000 task.stack: ffff8801c0740000 [ 27.645482] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 27.653708] RSP: 0018:ffff8801c0747a58 EFLAGS: 00010a07 [ 27.659123] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff826692ab [ 27.666366] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 27.673602] RBP: ffff8801c0747a68 R08: 0000000000000001 R09: 0000000000000000 [ 27.680839] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 27.688078] R13: 0000000000000020 R14: ffff8801c01f8000 R15: dffffc0000000000 [ 27.695318] FS: 0000000001288880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.703517] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.709366] CR2: 000000002012f000 CR3: 00000001c1212000 CR4: 0000000000160670 [ 27.716608] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.723846] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.731083] Stack: [ 27.733201] 0000000000000046 ffff8801c01f8158 ffff8801c0747ac8 ffffffff826692d1 [ 27.741167] ffff8801c01f8170 ffffed003803f02b ffffed003803f02e ffff8801c01f8168 [ 27.749129] dead4ead00000000 ffff8801c01f8140 0000000000000000 0000000000000000 [ 27.757086] Call Trace: [ 27.759643] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 27.766107] [] sg_finish_rem_req+0x2a6/0x320 [ 27.772130] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.778934] [] sg_new_read+0x3c/0x440 [ 27.784354] [] ? sg_get_rq_mark+0x142/0x190 [ 27.790293] [] sg_read+0x8c5/0x1470 [ 27.795536] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 27.802170] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 27.809237] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 27.815868] [] __vfs_read+0x103/0x670 [ 27.821286] [] ? default_llseek+0x290/0x290 [ 27.827223] [] ? fsnotify+0x86/0xf30 [ 27.832548] [] ? fsnotify+0xf30/0xf30 [ 27.837964] [] ? avc_policy_seqno+0x9/0x20 [ 27.843814] [] ? selinux_file_permission+0x82/0x460 [ 27.850451] [] ? security_file_permission+0x89/0x1e0 [ 27.857167] [] ? rw_verify_area+0xe5/0x2b0 [ 27.863019] [] vfs_read+0x11e/0x380 [ 27.868262] [] SyS_read+0xd9/0x1b0 [ 27.873416] [] ? vfs_copy_file_range+0x740/0x740 [ 27.879790] [] ? do_syscall_64+0x48/0x490 [ 27.885556] [] ? vfs_copy_file_range+0x740/0x740 [ 27.891927] [] do_syscall_64+0x1a4/0x490 [ 27.897606] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 27.904493] Code: e9 27 fc ff ff 0f 1f 44 00 00 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 3d [ 27.930989] RIP [] __free_pages+0x21/0x80 [ 27.936872] RSP [ 27.940749] ---[ end trace 9dc2aecd4dbe3b4f ]--- [ 27.945638] Kernel panic - not syncing: Fatal exception [ 27.951288] Dumping ftrace buffer: [ 27.954795] (ftrace buffer empty) [ 27.958471] Kernel Offset: disabled [ 27.962067] Rebooting in 86400 seconds..