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-8,10.128.0.36' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.958348] kasan: CONFIG_KASAN_INLINE enabled [ 33.959111] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.960143] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.960967] Dumping ftrace buffer: [ 33.961438] (ftrace buffer empty) [ 33.961933] Modules linked in: [ 33.962442] CPU: 1 PID: 3245 Comm: syzkaller134950 Not tainted 4.9.63-g44a3afc #92 [ 33.963482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.964698] task: ffff8801c7109800 task.stack: ffff8801c7730000 [ 33.965492] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 33.966574] RSP: 0018:ffff8801c7737ac0 EFLAGS: 00010246 [ 33.967295] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 33.968246] RDX: 0000000000000000 RSI: 000000000000002b RDI: ffff8801cf61a270 [ 33.969196] RBP: ffff8801c7737bc8 R08: 8551c99c2a45b4bd R09: ffffed0039dd7d91 [ 33.970146] R10: 0000000000000005 R11: ffffed0039dd7d90 R12: 0000000000001000 [ 33.971096] R13: 0000000000000000 R14: ffff8801ceebec60 R15: ffff8801cf61a240 [ 33.972048] FS: 000000000122f880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 33.973120] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.973893] CR2: 000000002066ffb1 CR3: 00000001c712b000 CR4: 00000000001406e0 [ 33.974845] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.975794] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.976742] Stack: [ 33.977036] ffff8801d5548f00 ffff8801c7737af0 ffff8801cf61a258 ffff88010000002b [ 33.978161] 0000000000000000 ffff8801cf61a268 000000000000004f 0000000000000246 [ 33.983607] ffff8801d1b67180 1ffff10038ee6f64 000000002066ffb1 000000002066ffd5 [ 33.991557] Call Trace: [ 33.994108] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 34.000739] [] ? fsnotify+0xf30/0xf30 [ 34.006301] [] ? avc_policy_seqno+0x9/0x20 [ 34.012152] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 34.019128] [] ? security_file_permission+0x89/0x1e0 [ 34.025842] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 34.032471] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 34.039099] [] do_readv_writev+0x520/0x750 [ 34.044949] [] ? vfs_write+0x530/0x530 [ 34.050449] [] ? _raw_spin_unlock+0x2c/0x50 [ 34.056387] [] ? __pmd_alloc+0x410/0x410 [ 34.062063] [] ? __do_page_fault+0x61a/0xd70 [ 34.068084] [] vfs_readv+0x84/0xc0 [ 34.073236] [] do_readv+0xe6/0x250 [ 34.078388] [] ? vfs_readv+0xc0/0xc0 [ 34.083712] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 34.090343] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 34.097145] [] SyS_readv+0x27/0x30 [ 34.102297] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 34.108835] 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 [ 34.135074] RIP [] sg_read+0xd0c/0x1440 [ 34.140773] RSP [ 34.144427] ---[ end trace 9fd63e11ef95a576 ]--- [ 34.149151] Kernel panic - not syncing: Fatal exception [ 34.154830] Dumping ftrace buffer: [ 34.158338] (ftrace buffer empty) [ 34.162014] Kernel Offset: disabled [ 34.165606] Rebooting in 86400 seconds..