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 '10.128.0.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.378455] kasan: CONFIG_KASAN_INLINE enabled [ 32.383039] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.390398] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.396600] Dumping ftrace buffer: [ 32.400107] (ftrace buffer empty) [ 32.403787] Modules linked in: [ 32.407069] CPU: 0 PID: 3770 Comm: syzkaller440806 Not tainted 4.9.91-gbb94f9d #68 [ 32.414743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.424069] task: ffff8801b6e79800 task.stack: ffff8801d94b8000 [ 32.430093] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 32.438342] RSP: 0018:ffff8801d94bf938 EFLAGS: 00010a07 [ 32.443757] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266930b [ 32.450993] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 32.458231] RBP: ffff8801d94bf948 R08: 0000000000000001 R09: 0000000000000000 [ 32.465466] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 32.472703] R13: 0000000000000020 R14: ffff8801b8854200 R15: dffffc0000000000 [ 32.479946] FS: 0000000000b04880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.488138] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.493988] CR2: 000000000043e740 CR3: 00000001b6828000 CR4: 0000000000160670 [ 32.501227] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.508465] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.515703] Stack: [ 32.517822] 0000000000000046 ffff8801b8854358 ffff8801d94bf9a8 ffffffff82669331 [ 32.525787] ffff8801b8854370 ffffed003710a86b ffffed003710a86e ffff8801b8854368 [ 32.533750] dead4ead00000000 ffff8801b8854340 0000000000000000 0000000000000000 [ 32.541709] Call Trace: [ 32.544270] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 32.550729] [] sg_finish_rem_req+0x2a6/0x320 [ 32.556753] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 32.563561] [] sg_new_read+0x3c/0x440 [ 32.568980] [] ? sg_get_rq_mark+0x142/0x190 [ 32.574916] [] sg_read+0x8c5/0x1470 [ 32.580158] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 32.586793] [] ? fsnotify+0x86/0xf30 [ 32.592128] [] ? fsnotify+0xf30/0xf30 [ 32.597545] [] ? avc_policy_seqno+0x9/0x20 [ 32.603401] [] do_loop_readv_writev.part.17+0xc8/0x2b0 [ 32.610296] [] do_readv_writev+0x5fd/0x740 [ 32.616149] [] ? vfs_write+0x530/0x530 [ 32.621654] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 32.628549] [] ? sg_ioctl+0x2a10/0x2a10 [ 32.634148] [] ? do_iter_readv_writev+0x4b0/0x4b0 [ 32.640612] [] ? __might_sleep+0x95/0x1a0 [ 32.646378] [] ? __fsnotify_parent+0xbc/0x340 [ 32.652494] [] ? avc_policy_seqno+0x9/0x20 [ 32.658343] [] ? fsnotify+0x86/0xf30 [ 32.663673] [] ? fsnotify+0xf30/0xf30 [ 32.669094] [] vfs_readv+0x84/0xc0 [ 32.674254] [] do_readv+0xe6/0x250 [ 32.679412] [] ? vfs_readv+0xc0/0xc0 [ 32.684744] [] ? SyS_read+0x1b0/0x1b0 [ 32.690162] [] SyS_readv+0x27/0x30 [ 32.695322] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 32.701870] [] do_syscall_64+0x1a4/0x490 [ 32.708149] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 32.715039] 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 [ 32.741506] RIP [] __free_pages+0x21/0x80 [ 32.747388] RSP [ 32.751297] ---[ end trace 798f041a28a7d1f5 ]--- [ 32.756375] Kernel panic - not syncing: Fatal exception [ 32.762095] Dumping ftrace buffer: [ 32.765608] (ftrace buffer empty) [ 32.769294] Kernel Offset: disabled [ 32.772890] Rebooting in 86400 seconds..