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-3,10.128.0.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.065474] sg_write: data in/out 34319/34 bytes for SCSI command 0xfc-- guessing data in; [ 35.065474] program syzkaller253047 not setting count and/or reply_len properly [ 35.068684] kasan: CONFIG_KASAN_INLINE enabled [ 35.069300] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.070282] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.071101] Dumping ftrace buffer: [ 35.071592] (ftrace buffer empty) [ 35.072085] Modules linked in: [ 35.072552] CPU: 1 PID: 3233 Comm: syzkaller253047 Not tainted 4.9.52-gc30c69c #54 [ 35.073559] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.077642] task: ffff8801cc12b000 task.stack: ffff8801cf450000 [ 35.078544] RIP: 0010:[] [] sg_read+0xcc1/0x1400 [ 35.079713] RSP: 0018:ffff8801cf457ac0 EFLAGS: 00010246 [ 35.080475] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 000000000000000c [ 35.081500] RDX: 0000000000000000 RSI: 00000000000000b4 RDI: ffff8801cfd08170 [ 35.082527] RBP: ffff8801cf457bc8 R08: 0000000000000000 R09: ffffed003b1bdbcd [ 35.083584] R10: 0000000000000005 R11: ffffed003b1bdbcc R12: 0000000000001000 [ 35.084607] R13: 0000000000000000 R14: ffff8801d8dede40 R15: ffff8801cfd08140 [ 35.085621] FS: 0000000000e14880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 35.093818] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.099673] CR2: 0000000020fbef28 CR3: 00000001cbfb7000 CR4: 00000000001406e0 [ 35.106919] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.114167] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.121413] Stack: [ 35.123540] ffffea00073d15c0 ffff8801cf457b18 ffff8801cfd08158 00000000000000b4 [ 35.131516] ffff8801cf457d60 ffff8801cfd08168 00000000000000d8 0000000000000246 [ 35.139483] ffff8801d1410c80 1ffff10039e8af64 0000000020fbef28 0000000020fbef4c [ 35.147445] Call Trace: [ 35.150013] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.156654] [] ? fsnotify+0xf30/0xf30 [ 35.162079] [] ? iov_iter_advance+0x216/0xd70 [ 35.168204] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 35.175200] [] ? security_file_permission+0x89/0x1e0 [ 35.181940] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.188597] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 35.195254] [] do_readv_writev+0x520/0x750 [ 35.201126] [] ? vfs_write+0x4e0/0x4e0 [ 35.206648] [] ? _raw_spin_unlock+0x2c/0x50 [ 35.212613] [] ? __pmd_alloc+0x410/0x410 [ 35.218313] [] ? fsnotify+0x86/0xf30 [ 35.223662] [] ? fsnotify+0xf30/0xf30 [ 35.229103] [] vfs_readv+0x84/0xc0 [ 35.234271] [] do_readv+0xe6/0x250 [ 35.239441] [] ? vfs_readv+0xc0/0xc0 [ 35.244776] [] ? __do_page_fault+0x33f/0xbd0 [ 35.250805] [] SyS_readv+0x27/0x30 [ 35.255966] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 35.262516] 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 [ 35.288897] RIP [] sg_read+0xcc1/0x1400 [ 35.294631] RSP [ 35.298512] ---[ end trace 2ef5880cda645c75 ]--- [ 35.303285] Kernel panic - not syncing: Fatal exception [ 35.308987] Dumping ftrace buffer: [ 35.312494] (ftrace buffer empty) [ 35.316172] Kernel Offset: disabled [ 35.319766] Rebooting in 86400 seconds..