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-2,10.128.0.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.396695] sg_write: data in/out 327644/96 bytes for SCSI command 0x0-- guessing data in; [ 50.396695] program syzkaller712817 not setting count and/or reply_len properly [ 50.401649] kasan: CONFIG_KASAN_INLINE enabled [ 50.402291] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.403257] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.404077] Dumping ftrace buffer: [ 50.404549] (ftrace buffer empty) [ 50.405043] Modules linked in: [ 50.405510] CPU: 1 PID: 3252 Comm: syzkaller712817 Not tainted 4.9.60-gdfe0a9b #81 [ 50.406516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.407733] task: ffff8801d63fe000 task.stack: ffff8801d6788000 [ 50.408548] RIP: 0010:[] [] sg_read+0xcc1/0x1400 [ 50.409696] RSP: 0018:ffff8801d678fac0 EFLAGS: 00010246 [ 50.411093] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 50.412063] RDX: 0000000000000000 RSI: 000000000000002b RDI: ffff8801d62c2270 [ 50.413014] RBP: ffff8801d678fbc8 R08: 0000000000000000 R09: ffffed003b269a11 [ 50.413964] R10: 0000000000000005 R11: ffffed003b269a10 R12: 0000000000001000 [ 50.414916] R13: 0000000000000000 R14: ffff8801d934d060 R15: ffff8801d62c2240 [ 50.415867] FS: 0000000001878880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 50.416952] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.422802] CR2: 0000000020ce2000 CR3: 00000001d5f77000 CR4: 00000000001406e0 [ 50.430041] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.437276] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.444534] Stack: [ 50.446654] ffff8801d14b80c0 ffff8801d678faf0 ffff8801d62c2258 ffff88010000002b [ 50.454607] 0000000000000000 ffff8801d62c2268 000000000000004f 0000000000000246 [ 50.462557] ffff8801d1b55180 1ffff1003acf1f64 0000000020ce2000 0000000020ce2024 [ 50.470501] Call Trace: [ 50.473059] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 50.479698] [] ? fsnotify+0xf30/0xf30 [ 50.485117] [] ? avc_policy_seqno+0x9/0x20 [ 50.490966] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 50.497942] [] ? security_file_permission+0x89/0x1e0 [ 50.504662] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 50.511295] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 50.517929] [] do_readv_writev+0x520/0x750 [ 50.523778] [] ? vfs_write+0x4e0/0x4e0 [ 50.529279] [] ? sg_ioctl+0x2af0/0x2af0 [ 50.534866] [] ? __vfs_write+0x10b/0x680 [ 50.540543] [] ? default_llseek+0x290/0x290 [ 50.546493] [] ? __might_sleep+0x95/0x1a0 [ 50.552258] [] ? __inode_security_revalidate+0xd9/0x130 [ 50.559236] [] ? avc_policy_seqno+0x9/0x20 [ 50.565086] [] ? selinux_file_permission+0x82/0x460 [ 50.571720] [] ? security_file_permission+0x89/0x1e0 [ 50.578437] [] vfs_readv+0x84/0xc0 [ 50.583590] [] do_readv+0xe6/0x250 [ 50.588744] [] ? vfs_readv+0xc0/0xc0 [ 50.594077] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 50.600714] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 50.607517] [] SyS_readv+0x27/0x30 [ 50.612675] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 50.619214] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 19 07 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 ed 06 00 00 48 8b 1b 48 85 db 0f 84 51 03 00 [ 50.645494] RIP [] sg_read+0xcc1/0x1400 [ 50.651194] RSP [ 50.654853] ---[ end trace 38e15c1fac653fa9 ]--- [ 50.659607] Kernel panic - not syncing: Fatal exception [ 50.665262] Dumping ftrace buffer: [ 50.668768] (ftrace buffer empty) [ 50.672442] Kernel Offset: disabled [ 50.676032] Rebooting in 86400 seconds..