[....] Starting enhanced syslogd: rsyslogd[ 10.399888] audit: type=1400 audit(1514813997.321:4): avc: denied { syslog } for pid=3165 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 '10.128.15.193' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.799675] kasan: CONFIG_KASAN_INLINE enabled [ 25.800375] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.801425] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 25.802271] Dumping ftrace buffer: [ 25.802783] (ftrace buffer empty) [ 25.803276] Modules linked in: [ 25.803751] CPU: 0 PID: 3328 Comm: syzkaller420373 Not tainted 4.9.73-gf3f3457 #11 [ 25.804780] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.806010] task: ffff8801ca848000 task.stack: ffff8801c36f0000 [ 25.806808] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 25.807913] RSP: 0018:ffff8801c36f7940 EFLAGS: 00010a07 [ 25.808630] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 25.809581] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 25.810539] RBP: ffff8801c36f7950 R08: 0000000000000001 R09: 0000000000000000 [ 25.811490] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 25.812452] R13: 0000000000000020 R14: ffff8801c8ca8000 R15: dffffc0000000000 [ 25.813413] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009539840 [ 25.814497] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.815270] CR2: 0000000020ef0fe0 CR3: 00000001c9c3d000 CR4: 00000000001406f0 [ 25.816222] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.817189] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.818140] Stack: [ 25.818433] ffff8801ca848000 ffff8801c8ca8158 ffff8801c36f79b0 ffffffff82664fc1 [ 25.819564] ffff8801c8ca8170 ffffed003919502b ffffed003919502e ffff8801c8ca8168 [ 25.826189] dead4ead00000000 ffff8801c8ca8140 0000000000000000 0000000000000000 [ 25.834139] Call Trace: [ 25.836692] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 25.843155] [] sg_finish_rem_req+0x2b5/0x340 [ 25.849178] [] sg_new_read.isra.20+0x39/0x3e0 [ 25.855289] [] ? sg_get_rq_mark+0x142/0x190 [ 25.861224] [] sg_read+0x8bd/0x1440 [ 25.866465] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.873099] [] ? fsnotify+0xf30/0xf30 [ 25.878530] [] ? avc_policy_seqno+0x9/0x20 [ 25.884382] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 25.891366] [] ? security_file_permission+0x89/0x1e0 [ 25.898086] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.904716] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.911357] [] compat_do_readv_writev+0x522/0x760 [ 25.917814] [] ? do_pwritev+0x1a0/0x1a0 [ 25.923405] [] ? __lru_cache_add+0x187/0x250 [ 25.929431] [] ? _raw_spin_unlock+0x2c/0x50 [ 25.935376] [] ? handle_mm_fault+0x6ee/0x2530 [ 25.941487] [] ? __pmd_alloc+0x410/0x410 [ 25.947161] [] compat_readv+0xe3/0x150 [ 25.952661] [] do_compat_readv+0xf4/0x1d0 [ 25.958435] [] ? compat_readv+0x150/0x150 [ 25.964204] [] compat_SyS_readv+0x26/0x30 [ 25.969968] [] ? SyS_pwritev2+0x80/0x80 [ 25.975558] [] do_fast_syscall_32+0x2f7/0x890 [ 25.981667] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.988301] [] entry_SYSENTER_compat+0x51/0x60 [ 25.994506] 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 [ 26.020816] RIP [] __free_pages+0x21/0x80 [ 26.026707] RSP [ 26.030766] ---[ end trace 25501751e06088cd ]--- [ 26.035559] Kernel panic - not syncing: Fatal exception [ 26.041255] Dumping ftrace buffer: [ 26.044766] (ftrace buffer empty) [ 26.048442] Kernel Offset: disabled [ 26.052033] Rebooting in 86400 seconds..