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 'ci-android-49-kasan-gce-9,10.128.0.46' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.856850] sg_write: data in/out 392925/196 bytes for SCSI command 0x0-- guessing data in; [ 42.856850] program syzkaller067337 not setting count and/or reply_len properly [ 42.860024] kasan: CONFIG_KASAN_INLINE enabled [ 42.860637] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.861602] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.862419] Dumping ftrace buffer: [ 42.862907] (ftrace buffer empty) [ 42.863400] Modules linked in: [ 42.863867] CPU: 1 PID: 3247 Comm: syzkaller067337 Not tainted 4.9.62-gf09daf1 #91 [ 42.864872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.866100] task: ffff8801cda08000 task.stack: ffff8801c5850000 [ 42.866895] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 42.867975] RSP: 0018:ffff8801c5857ac0 EFLAGS: 00010246 [ 42.868691] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 42.869641] RDX: 0000000000000000 RSI: 00000000000000d2 RDI: ffff8801c5ff4370 [ 42.870590] RBP: ffff8801c5857bc8 R08: 0000000000000000 R09: ffffed003a0d627d [ 42.871539] R10: 0000000000000005 R11: ffffed003a0d627c R12: 0000000000001000 [ 42.872489] R13: 0000000000000000 R14: ffff8801d06b13c0 R15: ffff8801c5ff4340 [ 42.873440] FS: 000000000124c880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 42.874514] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.875287] CR2: 000000002081b000 CR3: 00000001c5fe8000 CR4: 00000000001406e0 [ 42.876238] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.877200] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.884435] Stack: [ 42.886546] ffff8801d4ccf9c0 ffff8801c5857af0 ffff8801c5ff4358 ffff8801000000d2 [ 42.894494] 0000000000000000 ffff8801c5ff4368 00000000000000f6 0000000000000246 [ 42.902437] ffff8801d1bd2000 1ffff10038b0af64 000000002081b000 000000002081b024 [ 42.910382] Call Trace: [ 42.912933] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 42.919561] [] ? fsnotify+0xf30/0xf30 [ 42.924976] [] ? avc_policy_seqno+0x9/0x20 [ 42.930824] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 42.937801] [] ? security_file_permission+0x89/0x1e0 [ 42.944517] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 42.951143] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 42.957772] [] do_readv_writev+0x520/0x750 [ 42.963617] [] ? vfs_write+0x530/0x530 [ 42.969116] [] ? sg_ioctl+0x2c30/0x2c30 [ 42.974703] [] ? __vfs_write+0x10b/0x680 [ 42.980378] [] ? do_iter_readv_writev+0x400/0x400 [ 42.986832] [] ? __might_sleep+0x95/0x1a0 [ 42.992591] [] ? avc_policy_seqno+0x9/0x20 [ 42.998440] [] ? selinux_file_permission+0x82/0x460 [ 43.005077] [] ? security_file_permission+0x89/0x1e0 [ 43.011794] [] vfs_readv+0x84/0xc0 [ 43.016949] [] do_readv+0xe6/0x250 [ 43.022115] [] ? vfs_readv+0xc0/0xc0 [ 43.027446] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 43.034074] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 43.040874] [] SyS_readv+0x27/0x30 [ 43.046025] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 43.052566] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 df 05 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 [ 43.078801] RIP [] sg_read+0xd0c/0x1440 [ 43.084499] RSP [ 43.088214] ---[ end trace cb316ce287e837d8 ]--- [ 43.092993] Kernel panic - not syncing: Fatal exception [ 43.098667] Dumping ftrace buffer: [ 43.102175] (ftrace buffer empty) [ 43.105849] Kernel Offset: disabled [ 43.109440] Rebooting in 86400 seconds..