[....] Starting enhanced syslogd: rsyslogd[ 10.741618] audit: type=1400 audit(1514692822.742:4): 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 '10.128.15.230' (ECDSA) to the list of known hosts. syzkaller login: [ 28.727573] audit: type=1400 audit(1514692840.732:5): avc: denied { sys_admin } for pid=3335 comm="syzkaller053390" 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 [ 28.747586] IPVS: Creating netns size=2536 id=1 [ 28.768760] IPVS: Creating netns size=2536 id=2 [ 28.779593] IPVS: Creating netns size=2536 id=3 [ 28.800335] IPVS: Creating netns size=2536 id=4 [ 28.805384] audit: type=1400 audit(1514692840.812:6): avc: denied { sys_chroot } for pid=3338 comm="syzkaller053390" 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 [ 28.824005] sg_write: data in/out 131036/104 bytes for SCSI command 0x0-- guessing data in; [ 28.824005] program syzkaller053390 not setting count and/or reply_len properly [ 28.827839] kasan: CONFIG_KASAN_INLINE enabled [ 28.827840] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.827847] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.827850] Dumping ftrace buffer: [ 28.827852] (ftrace buffer empty) [ 28.827855] Modules linked in: [ 28.827860] CPU: 0 PID: 3341 Comm: syzkaller053390 Not tainted 4.9.73-gf3f3457 #11 [ 28.827862] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.827865] task: ffff8801c8f91800 task.stack: ffff8801c8da0000 [ 28.827877] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 28.827879] RSP: 0018:ffff8801c8da7940 EFLAGS: 00010a07 [ 28.827881] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 28.827883] RDX: 1bd5a9d5a0000003 RSI: 0000000000000004 RDI: dead4ead0000001c [ 28.827886] RBP: ffff8801c8da7950 R08: 0000000000000001 R09: 0000000000000001 [ 28.827888] R10: 0000000000000000 R11: ffff8801c8f91800 R12: 0000000000000004 [ 28.827890] R13: 0000000000000020 R14: ffff8801d69fc200 R15: dffffc0000000000 [ 28.827893] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009d2c900 [ 28.827896] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.827898] CR2: 0000000020c7d000 CR3: 00000001c1338000 CR4: 00000000001406f0 [ 28.827902] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.827904] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.827905] Stack: [ 28.827911] ffffffff838affb9 ffff8801d69fc358 ffff8801c8da79b0 ffffffff82664fc1 [ 28.827916] ffff8801d69fc370 ffffed003ad3f86b ffffed003ad3f86e ffff8801d69fc368 [ 28.827920] dead4ead00000000 ffff8801d69fc340 0000000000000000 0000000000000000 [ 28.827921] Call Trace: [ 28.827927] [] ? retint_kernel+0x2d/0x2d [ 28.827933] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 28.827936] [] sg_finish_rem_req+0x2b5/0x340 [ 28.827940] [] sg_new_read.isra.20+0x356/0x3e0 [ 28.827944] [] ? sg_get_rq_mark+0x136/0x190 [ 28.827947] [] sg_read+0x8bd/0x1440 [ 28.827951] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.827956] [] ? fsnotify+0xf30/0xf30 [ 28.827963] [] ? avc_policy_seqno+0x9/0x20 [ 28.827969] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 28.827972] [] ? security_file_permission+0x89/0x1e0 [ 28.827976] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.827980] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 28.827984] [] compat_do_readv_writev+0x522/0x760 [ 28.827988] [] ? do_pwritev+0x1a0/0x1a0 [ 28.827994] [] ? _raw_spin_unlock+0x2c/0x50 [ 28.828002] [] ? handle_mm_fault+0x6ee/0x2530 [ 28.828006] [] ? __pmd_alloc+0x410/0x410 [ 28.828010] [] compat_readv+0xe3/0x150 [ 28.828014] [] do_compat_readv+0xf4/0x1d0 [ 28.828017] [] ? compat_readv+0x150/0x150 [ 28.828021] [] compat_SyS_readv+0x26/0x30 [ 28.828025] [] ? SyS_pwritev2+0x80/0x80 [ 28.828030] [] do_fast_syscall_32+0x2f7/0x890 [ 28.828034] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.828038] [] entry_SYSENTER_compat+0x51/0x60 [ 28.828091] 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 [ 28.828095] RIP [] __free_pages+0x21/0x80 [ 28.828096] RSP [ 28.828101] ---[ end trace a665f23579901406 ]--- [ 28.828104] Kernel panic - not syncing: Fatal exception [ 28.830207] Dumping ftrace buffer: [ 28.830209] (ftrace buffer empty) [ 28.830210] Kernel Offset: disabled [ 29.216842] Rebooting in 86400 seconds..