[....] Starting enhanced syslogd: rsyslogd[ 13.486901] audit: type=1400 audit(1520502163.099:4): avc: denied { syslog } for pid=3637 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 '10.128.0.46' (ECDSA) to the list of known hosts. syzkaller login: [ 27.480009] audit: type=1400 audit(1520502177.089:5): avc: denied { sys_admin } for pid=3801 comm="syzkaller716950" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 27.508024] IPVS: Creating netns size=2536 id=1 executing program executing program [ 27.530148] IPVS: Creating netns size=2536 id=2 [ 27.541544] IPVS: Creating netns size=2536 id=3 [ 27.546658] audit: type=1400 audit(1520502177.159:6): avc: denied { sys_chroot } for pid=3804 comm="syzkaller716950" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 27.550792] kasan: CONFIG_KASAN_INLINE enabled [ 27.550795] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.550804] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.550808] Dumping ftrace buffer: [ 27.550811] (ftrace buffer empty) [ 27.550815] Modules linked in: [ 27.550823] CPU: 1 PID: 3817 Comm: syzkaller716950 Not tainted 4.9.86-gd3a2afb #51 [ 27.550827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.550831] task: ffff8801d8236000 task.stack: ffff8801d74f0000 [ 27.550847] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 27.550851] RSP: 0018:ffff8801d74f7940 EFLAGS: 00010a07 [ 27.550855] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82668edb [ 27.550859] RDX: 1bd5a9d5a0000003 RSI: 0000000000000006 RDI: dead4ead0000001c [ 27.550862] RBP: ffff8801d74f7950 R08: 0000000048000000 R09: 0000000000001e30 [ 27.550866] R10: 0000000000002100 R11: ffff8801d8236000 R12: 0000000000000004 [ 27.550870] R13: 0000000000000020 R14: ffff8801d7a9a100 R15: dffffc0000000000 [ 27.550875] FS: 00007f9abc035700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.550879] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.550883] CR2: 0000000020e94000 CR3: 00000001c4902000 CR4: 0000000000160670 [ 27.550889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.550893] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.550894] Stack: [ 27.550903] 0000000000000001 ffff8801d7a9a258 ffff8801d74f79b0 ffffffff82668f01 [ 27.550912] ffff8801d7a9a270 ffffed003af5344b ffffed003af5344e ffff8801d7a9a268 [ 27.550921] dead4ead00000000 ffff8801d7a9a240 0000000000000000 0000000000000000 [ 27.550922] Call Trace: [ 27.550932] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 27.550939] [] sg_finish_rem_req+0x2b5/0x340 [ 27.550946] [] sg_new_read.isra.20+0x18d/0x3e0 [ 27.550952] [] sg_read+0x8b7/0x1440 [ 27.550959] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 27.550965] [] ? fsnotify+0x86/0xf30 [ 27.550970] [] ? fsnotify+0xf30/0xf30 [ 27.550979] [] ? avc_policy_seqno+0x9/0x20 [ 27.550988] [] do_loop_readv_writev.part.17+0xc8/0x2b0 [ 27.550995] [] do_readv_writev+0x5fd/0x740 [ 27.551002] [] ? vfs_write+0x530/0x530 [ 27.551009] [] ? exit_robust_list+0x230/0x230 [ 27.551017] [] ? __fget+0x20a/0x3b0 [ 27.551023] [] ? __fget+0x231/0x3b0 [ 27.551028] [] ? __fget+0x47/0x3b0 [ 27.551035] [] vfs_readv+0x84/0xc0 [ 27.551041] [] do_readv+0xe6/0x250 [ 27.551048] [] ? vfs_readv+0xc0/0xc0 [ 27.551054] [] ? SyS_read+0x1b0/0x1b0 [ 27.551061] [] SyS_readv+0x27/0x30 [ 27.551068] [] ? rw_copy_check_uvector+0x2c0/0x2c0 [ 27.551075] [] do_syscall_64+0x1a4/0x490 [ 27.551083] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 27.551187] 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 [ 27.551194] RIP [] __free_pages+0x21/0x80 [ 27.551196] RSP [ 27.551203] ---[ end trace 341d185e1f17d381 ]--- [ 27.551207] Kernel panic - not syncing: Fatal exception [ 27.571858] Dumping ftrace buffer: [ 27.571860] (ftrace buffer empty) [ 27.571863] Kernel Offset: disabled [ 27.918286] Rebooting in 86400 seconds..