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-0,10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.306012] sg_write: data in/out 1496530133/155 bytes for SCSI command 0xc5-- guessing data in; [ 33.306012] program syzkaller129091 not setting count and/or reply_len properly [ 33.308941] kasan: CONFIG_KASAN_INLINE enabled [ 33.309599] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.310614] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.311457] Dumping ftrace buffer: [ 33.311934] (ftrace buffer empty) [ 33.312430] Modules linked in: [ 33.312919] CPU: 0 PID: 3242 Comm: syzkaller129091 Not tainted 4.9.62-gf09daf1 #91 [ 33.313927] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.315146] task: ffff8801c9e59800 task.stack: ffff8801caf98000 [ 33.315940] RIP: 0010:[] [] sg_read+0xd0c/0x1440 [ 33.317042] RSP: 0018:ffff8801caf9f700 EFLAGS: 00010246 [ 33.317759] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 33.318712] RDX: 0000000000000000 RSI: 0000000000000fdc RDI: ffff8801cacf2270 [ 33.319663] RBP: ffff8801caf9f808 R08: 0000000000000000 R09: ffffed003a362f31 [ 33.320635] R10: 0000000000000005 R11: ffffed003a362f30 R12: 0000000000001000 [ 33.321634] R13: 0000000000000000 R14: ffff8801d1b17960 R15: ffff8801cacf2240 [ 33.322587] FS: 0000000001ba2880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 33.323660] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.324434] CR2: 00000000208aff35 CR3: 00000001cb0b7000 CR4: 00000000001406f0 [ 33.325405] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.327740] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.334976] Stack: [ 33.337090] ffff8801d225ca40 ffff8801caf9f730 ffff8801cacf2258 ffff880100000fdc [ 33.345042] 0000000000000000 ffff8801cacf2268 0000000000001000 0000000000000246 [ 33.352987] ffff8801d1bd4500 1ffff100395f3eec ffff8801cefa6000 ffff8801cefa6024 [ 33.360941] Call Trace: [ 33.363494] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.370126] [] ? fsnotify+0xf30/0xf30 [ 33.375541] [] ? avc_policy_seqno+0x9/0x20 [ 33.381391] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 33.388379] [] ? security_file_permission+0x89/0x1e0 [ 33.395098] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.401728] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.408359] [] do_readv_writev+0x520/0x750 [ 33.414207] [] ? vfs_write+0x530/0x530 [ 33.419708] [] ? kasan_unpoison_shadow+0x35/0x50 [ 33.426080] [] ? push_pipe+0x372/0x770 [ 33.431585] [] ? sanity+0x1ff/0x610 [ 33.436826] [] ? iov_iter_get_pages_alloc+0x2c7/0xf10 [ 33.443631] [] vfs_readv+0x84/0xc0 [ 33.448793] [] default_file_splice_read+0x43f/0x7a0 [ 33.455424] [] ? do_splice_direct+0x270/0x270 [ 33.461536] [] ? __lru_cache_add+0x187/0x250 [ 33.467562] [] ? security_file_permission+0x89/0x1e0 [ 33.474454] [] ? do_splice_direct+0x270/0x270 [ 33.480565] [] do_splice_to+0x10a/0x160 [ 33.486153] [] SyS_splice+0xf5f/0x1520 [ 33.491654] [] ? vfs_write+0x224/0x530 [ 33.497156] [] ? compat_SyS_vmsplice+0x240/0x240 [ 33.503528] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 33.510334] [] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.516882] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 33.523438] 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 [ 33.549838] RIP [] sg_read+0xd0c/0x1440 [ 33.555543] RSP [ 33.559331] ---[ end trace f9014b117c3a46bf ]--- [ 33.564059] Kernel panic - not syncing: Fatal exception [ 33.569773] Dumping ftrace buffer: [ 33.573284] (ftrace buffer empty) [ 33.576962] Kernel Offset: disabled [ 33.580554] Rebooting in 86400 seconds..