[....] Starting enhanced syslogd: rsyslogd[ 12.730693] audit: type=1400 audit(1514775394.173:4): avc: denied { syslog } for pid=3178 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 '10.128.15.205' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.544455] kasan: CONFIG_KASAN_INLINE enabled [ 23.549093] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.556430] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 23.562627] Dumping ftrace buffer: [ 23.566129] (ftrace buffer empty) [ 23.569816] Modules linked in: [ 23.573088] CPU: 0 PID: 3338 Comm: syzkaller774720 Not tainted 4.9.73-gf3f3457 #11 [ 23.580762] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.590088] task: ffff8801cbf68000 task.stack: ffff8801c91d8000 [ 23.596108] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 23.604341] RSP: 0018:ffff8801c91dfa50 EFLAGS: 00010a07 [ 23.609755] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 23.616989] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 23.624223] RBP: ffff8801c91dfa60 R08: 0000000000000001 R09: 0000000000000000 [ 23.631464] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 23.638699] R13: 0000000000000020 R14: ffff8801c861a100 R15: dffffc0000000000 [ 23.645936] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000082c2840 [ 23.654474] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.660322] CR2: 0000000020001000 CR3: 00000001cd542000 CR4: 00000000001406f0 [ 23.667558] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.674900] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.682132] Stack: [ 23.684246] ffff8801cbf68000 ffff8801c861a258 ffff8801c91dfac0 ffffffff82664fc1 [ 23.692192] ffff8801c861a270 ffffed00390c344b ffffed00390c344e ffff8801c861a268 [ 23.700153] dead4ead00000000 ffff8801c861a240 0000000000000000 0000000000000000 [ 23.708110] Call Trace: [ 23.710664] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 23.717117] [] sg_finish_rem_req+0x2b5/0x340 [ 23.723139] [] sg_new_read.isra.20+0x39/0x3e0 [ 23.729253] [] ? sg_get_rq_mark+0x142/0x190 [ 23.735188] [] sg_read+0x8bd/0x1440 [ 23.741297] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.748272] [] ? lru_cache_add+0xd9/0x1e0 [ 23.754033] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 23.761097] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 23.767728] [] __vfs_read+0x103/0x670 [ 23.773143] [] ? default_llseek+0x290/0x290 [ 23.779080] [] ? fsnotify+0x86/0xf30 [ 23.784409] [] ? fsnotify+0xf30/0xf30 [ 23.789829] [] ? avc_policy_seqno+0x9/0x20 [ 23.795678] [] ? selinux_file_permission+0x82/0x460 [ 23.802308] [] ? security_file_permission+0x89/0x1e0 [ 23.809025] [] ? rw_verify_area+0xe5/0x2b0 [ 23.815805] [] vfs_read+0x11e/0x380 [ 23.821054] [] SyS_read+0xd9/0x1b0 [ 23.826211] [] ? vfs_copy_file_range+0x740/0x740 [ 23.832580] [] ? do_fast_syscall_32+0xcf/0x890 [ 23.838777] [] ? vfs_copy_file_range+0x740/0x740 [ 23.845146] [] do_fast_syscall_32+0x2f7/0x890 [ 23.852210] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.858842] [] entry_SYSENTER_compat+0x51/0x60 [ 23.865038] 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 [ 23.891317] RIP [] __free_pages+0x21/0x80 [ 23.897538] RSP [ 23.901707] ---[ end trace 83c8bfc01e8c02e6 ]--- [ 23.906453] Kernel panic - not syncing: Fatal exception [ 23.912214] Dumping ftrace buffer: [ 23.915729] (ftrace buffer empty) [ 23.919405] Kernel Offset: disabled [ 23.922999] Rebooting in 86400 seconds..