[....] Starting enhanced syslogd: rsyslogd[ 12.618715] audit: type=1400 audit(1514374047.814:4): avc: denied { syslog } for pid=3174 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.57' (ECDSA) to the list of known hosts. net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 executing program executing program executing program executing program syzkaller login: [ 24.126868] sg_write: data in/out 1219236422/100 bytes for SCSI command 0xc4-- guessing data in; [ 24.126868] program syzkaller368305 not setting count and/or reply_len properly [ 24.134436] sg_write: data in/out 1219236422/100 bytes for SCSI command 0xc4-- guessing data in; [ 24.134436] program syzkaller368305 not setting count and/or reply_len properly [ 24.134519] kasan: CONFIG_KASAN_INLINE enabled [ 24.134521] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.134529] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.134534] Dumping ftrace buffer: [ 24.134537] (ftrace buffer empty) [ 24.134541] Modules linked in: [ 24.134547] CPU: 0 PID: 3526 Comm: syzkaller368305 Not tainted 4.9.71-g2506378 #9 [ 24.134551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.134554] task: ffff8801c499c800 task.stack: ffff8801c3d70000 [ 24.134570] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 24.134574] RSP: 0018:ffff8801c3d775e0 EFLAGS: 00010a07 [ 24.134577] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664deb [ 24.134581] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 24.134585] RBP: ffff8801c3d775f0 R08: ffffed00388e16dc R09: ffff8801c470b6c0 [ 24.134588] R10: 0000000000000005 R11: ffffed00388e16dc R12: 0000000000000004 [ 24.134591] R13: 0000000000000020 R14: ffff8801c7862100 R15: dffffc0000000000 [ 24.134596] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f76dab40 [ 24.134600] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 24.134603] CR2: 0000000020df7000 CR3: 00000001c78d7000 CR4: 00000000001406f0 [ 24.134610] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.134614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.134615] Stack: [ 24.134624] 0000000000000000 ffff8801c7862258 ffff8801c3d77650 ffffffff82664e11 [ 24.134633] ffff8801c7862270 ffffed0038f0c44b ffffed0038f0c44e ffff8801c7862268 [ 24.134640] dead4ead00000000 ffff8801c7862240 0000000000000000 0000000000000000 [ 24.134642] Call Trace: [ 24.134651] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 24.134657] [] sg_finish_rem_req+0x2b5/0x340 [ 24.134663] [] sg_read+0xa1c/0x1440 [ 24.134670] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.134679] [] ? fsnotify+0xf30/0xf30 [ 24.134687] [] ? avc_policy_seqno+0x9/0x20 [ 24.134695] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 24.134702] [] ? security_file_permission+0x89/0x1e0 [ 24.134709] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.134715] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.134721] [] do_readv_writev+0x520/0x750 [ 24.134727] [] ? vfs_write+0x530/0x530 [ 24.134735] [] ? kasan_unpoison_shadow+0x35/0x50 [ 24.134743] [] ? push_pipe+0x372/0x770 [ 24.134749] [] ? sanity+0x1ff/0x610 [ 24.134757] [] ? iov_iter_get_pages_alloc+0x2c7/0xf10 [ 24.134764] [] vfs_readv+0x84/0xc0 [ 24.134771] [] default_file_splice_read+0x43f/0x7a0 [ 24.134778] [] ? do_splice_direct+0x270/0x270 [ 24.134786] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 24.134794] [] ? __fsnotify_parent+0xbc/0x340 [ 24.134801] [] ? fsnotify+0x86/0xf30 [ 24.134807] [] ? fsnotify+0xf30/0xf30 [ 24.134814] [] ? avc_policy_seqno+0x9/0x20 [ 24.134821] [] ? selinux_file_permission+0x82/0x460 [ 24.134827] [] ? security_file_permission+0x89/0x1e0 [ 24.134833] [] ? rw_verify_area+0xe5/0x2b0 [ 24.134840] [] ? do_splice_direct+0x270/0x270 [ 24.134846] [] do_splice_to+0x10a/0x160 [ 24.134853] [] SyS_splice+0xf5f/0x1520 [ 24.134860] [] ? compat_SyS_vmsplice+0x240/0x240 [ 24.134867] [] ? do_fast_syscall_32+0xcf/0x890 [ 24.134874] [] ? compat_SyS_vmsplice+0x240/0x240 [ 24.134880] [] do_fast_syscall_32+0x2f7/0x890 [ 24.134886] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.134893] [] entry_SYSENTER_compat+0x51/0x60 [ 24.134994] 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 [ 24.135000] RIP [] __free_pages+0x21/0x80 [ 24.135002] RSP [ 24.135009] ---[ end trace 34be35124951ba1a ]--- [ 24.135012] Kernel panic - not syncing: Fatal exception [ 24.143808] Dumping ftrace buffer: [ 24.143810] (ftrace buffer empty) [ 24.143812] Kernel Offset: disabled [ 24.593093] Rebooting in 86400 seconds..