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-6,10.128.0.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.085173] sg_write: data in/out 1219236422/100 bytes for SCSI command 0xc4-- guessing data in; [ 32.085173] program syzkaller805614 not setting count and/or reply_len properly [ 32.087520] kasan: CONFIG_KASAN_INLINE enabled [ 32.088183] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 32.089181] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 32.090004] Dumping ftrace buffer: [ 32.090510] (ftrace buffer empty) [ 32.091006] Modules linked in: [ 32.091476] CPU: 1 PID: 3237 Comm: syzkaller805614 Not tainted 4.9.52-g9b2b081 #55 [ 32.092495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.093752] task: ffff8801d6a51800 task.stack: ffff8801d92a0000 [ 32.094547] RIP: 0010:[] [] sg_read+0xcc1/0x1400 [ 32.095637] RSP: 0018:ffff8801d92a7700 EFLAGS: 00010246 [ 32.096372] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 32.097348] RDX: 0000000000000000 RSI: 0000000000000fdc RDI: ffff8801d8e84370 [ 32.098367] RBP: ffff8801d92a7808 R08: 0000000000000000 R09: ffffed0039bd68c5 [ 32.099497] R10: 0000000000000005 R11: ffffed0039bd68c4 R12: 0000000000001000 [ 32.100452] R13: 0000000000000000 R14: ffff8801cdeb4600 R15: ffff8801d8e84340 [ 32.101410] FS: 0000000001b3b880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 32.102591] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.103371] CR2: 0000000020df7000 CR3: 00000001d682c000 CR4: 00000000001406e0 [ 32.104325] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.105278] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.112503] Stack: [ 32.114623] ffffea00075a0900 ffff8801d92a7758 ffff8801d8e84358 ffffffff00000fdc [ 32.122581] ffff8801d6824240 ffff8801d8e84368 0000000000001000 0000000000000246 [ 32.130537] ffff8801d1badb80 1ffff1003b254eec ffff8801ca6e2000 ffff8801ca6e2024 [ 32.138510] Call Trace: [ 32.141078] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.147714] [] ? fsnotify+0xf30/0xf30 [ 32.153133] [] ? avc_policy_seqno+0x9/0x20 [ 32.158996] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 32.165977] [] ? security_file_permission+0x89/0x1e0 [ 32.172696] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.179331] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 32.185963] [] do_readv_writev+0x520/0x750 [ 32.191823] [] ? vfs_write+0x4e0/0x4e0 [ 32.197339] [] ? kasan_unpoison_shadow+0x35/0x50 [ 32.203724] [] ? push_pipe+0x372/0x770 [ 32.209230] [] ? sanity+0x1ff/0x610 [ 32.214473] [] ? iov_iter_get_pages_alloc+0x2c7/0xf10 [ 32.221280] [] vfs_readv+0x84/0xc0 [ 32.226442] [] default_file_splice_read+0x43f/0x7a0 [ 32.233077] [] ? do_splice_direct+0x270/0x270 [ 32.239202] [] ? __pagevec_lru_add_fn+0x7b0/0x7b0 [ 32.245661] [] ? pagevec_lru_move_fn+0x17f/0x1f0 [ 32.252035] [] ? put_pages_list+0x150/0x150 [ 32.257975] [] ? __lru_cache_add+0x187/0x250 [ 32.264006] [] ? security_file_permission+0x89/0x1e0 [ 32.270732] [] ? do_splice_direct+0x270/0x270 [ 32.276862] [] do_splice_to+0x10a/0x160 [ 32.282453] [] SyS_splice+0xf5f/0x1520 [ 32.287958] [] ? vfs_write+0x20a/0x4e0 [ 32.293461] [] ? compat_SyS_vmsplice+0x240/0x240 [ 32.299837] [] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.306387] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 32.312932] 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 [ 32.339398] RIP [] sg_read+0xcc1/0x1400 [ 32.345121] RSP [ 32.348943] ---[ end trace ed83b6236b1d0826 ]--- [ 32.353673] Kernel panic - not syncing: Fatal exception [ 32.359548] Dumping ftrace buffer: [ 32.363066] (ftrace buffer empty) [ 32.366741] Kernel Offset: disabled [ 32.370335] Rebooting in 86400 seconds..