[....] Starting enhanced syslogd: rsyslogd[ 12.645069] audit: type=1400 audit(1514760924.604:4): avc: denied { syslog } for pid=3171 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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 '10.128.15.220' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 23.861954] sg_write: data in/out 262109/104 bytes for SCSI command 0x1-- guessing data in; [ 23.861954] program syzkaller300038 not setting count and/or reply_len properly [ 23.879842] sg_write: data in/out 262109/104 bytes for SCSI command 0x1-- guessing data in; [ 23.879842] program syzkaller300038 not setting count and/or reply_len properly [ 23.900756] kasan: CONFIG_KASAN_INLINE enabled [ 23.900757] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.900764] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 23.900767] Dumping ftrace buffer: [ 23.900770] (ftrace buffer empty) [ 23.900773] Modules linked in: [ 23.900778] CPU: 1 PID: 3335 Comm: syzkaller300038 Not tainted 4.9.73-gf3f3457 #11 [ 23.900780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.900783] task: ffff8801ca4b3000 task.stack: ffff8801c8a18000 [ 23.900796] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 23.900798] RSP: 0018:ffff8801c8a1f940 EFLAGS: 00010a07 [ 23.900800] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 23.900803] RDX: 1bd5a9d5a0000003 RSI: 0000000000000008 RDI: dead4ead0000001c [ 23.900805] RBP: ffff8801c8a1f950 R08: 0000000000000001 R09: 0000000000000000 [ 23.900807] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 23.900809] R13: 0000000000000020 R14: ffff8801c9428000 R15: dffffc0000000000 [ 23.900812] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009731840 [ 23.900815] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.900817] CR2: 00000000204f2000 CR3: 00000001c8bef000 CR4: 00000000001406e0 [ 23.900821] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.900823] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.900824] Stack: [ 23.900830] ffff8801ca4b3000 ffff8801c9428158 ffff8801c8a1f9b0 ffffffff82664fc1 [ 23.900834] ffff8801c9428170 ffffed003928502b ffffed003928502e ffff8801c9428168 [ 23.900839] dead4ead00000000 ffff8801c9428140 0000000000000000 0000000000000000 [ 23.900840] Call Trace: [ 23.900846] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 23.900849] [] sg_finish_rem_req+0x2b5/0x340 [ 23.900853] [] sg_new_read.isra.20+0x39/0x3e0 [ 23.900856] [] ? sg_get_rq_mark+0x142/0x190 [ 23.900860] [] sg_read+0x8bd/0x1440 [ 23.900863] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.900869] [] ? fsnotify+0xf30/0xf30 [ 23.900875] [] ? avc_policy_seqno+0x9/0x20 [ 23.900881] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 23.900885] [] ? security_file_permission+0x89/0x1e0 [ 23.900889] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.900892] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.900896] [] compat_do_readv_writev+0x522/0x760 [ 23.900900] [] ? do_pwritev+0x1a0/0x1a0 [ 23.900907] [] ? _raw_spin_unlock+0x2c/0x50 [ 23.900914] [] ? handle_mm_fault+0x6ee/0x2530 [ 23.900918] [] ? __pmd_alloc+0x410/0x410 [ 23.900922] [] compat_readv+0xe3/0x150 [ 23.900925] [] do_compat_readv+0xf4/0x1d0 [ 23.900929] [] ? compat_readv+0x150/0x150 [ 23.900933] [] compat_SyS_readv+0x26/0x30 [ 23.900937] [] ? SyS_pwritev2+0x80/0x80 [ 23.900942] [] do_fast_syscall_32+0x2f7/0x890 [ 23.900946] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.900950] [] entry_SYSENTER_compat+0x51/0x60 [ 23.901003] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d [ 23.901007] RIP [] __free_pages+0x21/0x80 [ 23.901009] RSP [ 23.901015] ---[ end trace 8fa346ebcd93443c ]--- [ 23.901017] Kernel panic - not syncing: Fatal exception [ 23.914563] Dumping ftrace buffer: [ 23.914566] (ftrace buffer empty) [ 23.914568] Kernel Offset: disabled [ 24.279260] Rebooting in 86400 seconds..