INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-android-49-kasan-gce-1,10.128.15.201' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.182202] sg_write: data in/out 93/34 bytes for SCSI command 0xfc-- guessing data in; [ 32.182202] program syzkaller622146 not setting count and/or reply_len properly [ 32.198628] kasan: CONFIG_KASAN_INLINE enabled [ 32.199266] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.200232] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.201049] Dumping ftrace buffer: [ 32.201525] (ftrace buffer empty) [ 32.202019] Modules linked in: [ 32.202714] CPU: 1 PID: 3245 Comm: syzkaller622146 Not tainted 4.9.54-g9add7c4 #63 [ 32.210381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.219698] task: ffff8801cdbc1800 task.stack: ffff8801c6318000 [ 32.225717] RIP: 0010:[] [] sg_read+0xcc1/0x1400 [ 32.233764] RSP: 0018:ffff8801c631fac0 EFLAGS: 00010246 [ 32.239175] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 32.246410] RDX: 0000000000000000 RSI: 00000000000000a5 RDI: ffff8801d0baa270 [ 32.253645] RBP: ffff8801c631fbc8 R08: 0000000000000000 R09: ffffed003a332c89 [ 32.260882] R10: 0000000000000005 R11: ffffed003a332c88 R12: 0000000000001000 [ 32.268115] R13: 0000000000000000 R14: ffff8801d1996420 R15: ffff8801d0baa240 [ 32.275351] FS: 00007fc85cc25700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 32.283548] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.289391] CR2: 0000000020b96000 CR3: 00000001ca3ff000 CR4: 00000000001406e0 [ 32.296628] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.303862] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.311094] Stack: [ 32.313207] ffffea000718c7c0 ffff8801c631fb18 ffff8801d0baa258 00000000000000a5 [ 32.321148] ffff8801c631fd50 ffff8801d0baa268 00000000000000c9 0000000000000246 [ 32.329091] ffff8801d1bab180 1ffff10038c63f64 0000000020b96000 0000000020b96024 [ 32.337034] Call Trace: [ 32.339588] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.346216] [] ? fsnotify+0xf30/0xf30 [ 32.351632] [] ? avc_policy_seqno+0x9/0x20 [ 32.357478] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 32.364454] [] ? security_file_permission+0x89/0x1e0 [ 32.371169] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.377797] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.384425] [] do_readv_writev+0x520/0x750 [ 32.390271] [] ? vfs_write+0x4e0/0x4e0 [ 32.395772] [] ? __fget+0x47/0x3a0 [ 32.400921] [] ? __fget+0x201/0x3a0 [ 32.406157] [] ? __fget+0x228/0x3a0 [ 32.411394] [] ? __fget+0x47/0x3a0 [ 32.416545] [] vfs_readv+0x84/0xc0 [ 32.421697] [] do_readv+0xe6/0x250 [ 32.426847] [] ? vfs_readv+0xc0/0xc0 [ 32.432176] [] ? mm_fault_error+0x2c0/0x2c0 [ 32.438107] [] SyS_readv+0x27/0x30 [ 32.443265] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 32.449805] 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 [ 32.476041] RIP [] sg_read+0xcc1/0x1400 [ 32.481744] RSP [ 32.485464] ---[ end trace 772ea0f2884281ea ]--- [ 32.490208] Kernel panic - not syncing: Fatal exception [ 32.495877] Dumping ftrace buffer: [ 32.499381] (ftrace buffer empty) [ 32.503060] Kernel Offset: disabled [ 32.506650] Rebooting in 86400 seconds..