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-4,10.128.15.194' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.572782] kasan: CONFIG_KASAN_INLINE enabled [ 32.573536] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.574503] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.575380] Dumping ftrace buffer: [ 32.575853] (ftrace buffer empty) [ 32.576349] Modules linked in: [ 32.576830] CPU: 0 PID: 3240 Comm: syzkaller822744 Not tainted 4.9.52-gc30c69c #54 [ 32.577837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.579167] task: ffff8801cfbbe000 task.stack: ffff8801ceed8000 [ 32.580002] RIP: 0010:[] [] sg_read+0xcc1/0x1400 [ 32.581236] RSP: 0018:ffff8801ceedfac0 EFLAGS: 00010246 [ 32.581997] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 32.582995] RDX: 0000000000000000 RSI: 0000000000000037 RDI: ffff8801c4b7a270 [ 32.583947] RBP: ffff8801ceedfbc8 R08: 8551c99c2a45b4bd R09: ffffed003a35cf85 [ 32.584926] R10: 0000000000000005 R11: ffffed003a35cf84 R12: 0000000000001000 [ 32.585877] R13: 0000000000000000 R14: ffff8801d1ae7c00 R15: ffff8801c4b7a240 [ 32.586841] FS: 000000000146e880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 32.587975] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.588779] CR2: 000000000043e6b0 CR3: 00000001d17d9000 CR4: 00000000001406f0 [ 32.589758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.590721] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.591755] Stack: [ 32.592052] ffffea00073bb7c0 ffff8801ceedfb18 ffff8801c4b7a258 0000000000000037 [ 32.594818] ffff8801ceedfdc0 ffff8801c4b7a268 000000000000005b 0000000000000246 [ 32.602780] ffff8801d1b9a280 1ffff10039ddbf64 0000000020001000 0000000020001024 [ 32.610746] Call Trace: [ 32.613302] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.619937] [] ? fsnotify+0xf30/0xf30 [ 32.625358] [] ? avc_policy_seqno+0x9/0x20 [ 32.631219] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 32.638199] [] ? security_file_permission+0x89/0x1e0 [ 32.644925] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.651559] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.658191] [] do_readv_writev+0x520/0x750 [ 32.664128] [] ? vfs_write+0x4e0/0x4e0 [ 32.669639] [] ? sg_ioctl+0x2af0/0x2af0 [ 32.675231] [] ? __vfs_write+0x10b/0x680 [ 32.680905] [] ? default_llseek+0x290/0x290 [ 32.686843] [] ? __might_sleep+0x95/0x1a0 [ 32.692610] [] ? check_preemption_disabled+0x3b/0x200 [ 32.699428] [] ? security_file_permission+0x89/0x1e0 [ 32.706150] [] vfs_readv+0x84/0xc0 [ 32.711304] [] do_readv+0xe6/0x250 [ 32.716472] [] ? vfs_readv+0xc0/0xc0 [ 32.721803] [] ? SyS_read+0x1b0/0x1b0 [ 32.727230] [] SyS_readv+0x27/0x30 [ 32.732389] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 32.738929] 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 [ 32.765730] RIP [] sg_read+0xcc1/0x1400 [ 32.771457] RSP [ 32.775126] ---[ end trace b2e2fa456c0c325a ]--- [ 32.779867] Kernel panic - not syncing: Fatal exception [ 32.785239] Dumping ftrace buffer: [ 32.788751] (ftrace buffer empty) [ 32.792437] Kernel Offset: disabled [ 32.796032] Rebooting in 86400 seconds..