[....] Starting enhanced syslogd: rsyslogd[ 13.148900] audit: type=1400 audit(1514756057.371:4): avc: denied { syslog } for pid=3172 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 '10.128.0.18' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 22.087106] kasan: CONFIG_KASAN_INLINE enabled [ 22.091709] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.099061] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 22.105313] Dumping ftrace buffer: [ 22.108817] (ftrace buffer empty) [ 22.112490] Modules linked in: [ 22.115773] CPU: 0 PID: 3321 Comm: syzkaller229057 Not tainted 4.9.73-gf3f3457 #11 [ 22.123439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.132758] task: ffff8801ca619800 task.stack: ffff8801c9938000 [ 22.138776] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 22.147000] RSP: 0018:ffff8801c993fa50 EFLAGS: 00010a07 [ 22.152420] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 22.159660] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 22.167519] RBP: ffff8801c993fa60 R08: 0000000000000001 R09: 0000000000000000 [ 22.174753] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 22.181987] R13: 0000000000000020 R14: ffff8801c99dc200 R15: dffffc0000000000 [ 22.189227] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008647840 [ 22.197419] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.203264] CR2: 0000000020001000 CR3: 00000001ce2c6000 CR4: 00000000001406f0 [ 22.210504] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.217739] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.224981] Stack: [ 22.227095] ffff8801ca619800 ffff8801c99dc358 ffff8801c993fac0 ffffffff82664fc1 [ 22.235039] ffff8801c99dc370 ffffed003933b86b ffffed003933b86e ffff8801c99dc368 [ 22.243008] dead4ead00000000 ffff8801c99dc340 0000000000000000 0000000000000000 [ 22.250956] Call Trace: [ 22.253510] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 22.259971] [] sg_finish_rem_req+0x2b5/0x340 [ 22.265996] [] sg_new_read.isra.20+0x39/0x3e0 [ 22.272104] [] ? sg_get_rq_mark+0x142/0x190 [ 22.278039] [] sg_read+0x8bd/0x1440 [ 22.283279] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 22.289908] [] ? lru_cache_add+0xd9/0x1e0 [ 22.295677] [] ? do_huge_pmd_anonymous_page+0xb05/0x10d0 [ 22.302739] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 22.309370] [] __vfs_read+0x103/0x670 [ 22.314784] [] ? default_llseek+0x290/0x290 [ 22.320720] [] ? fsnotify+0x86/0xf30 [ 22.326046] [] ? fsnotify+0xf30/0xf30 [ 22.331463] [] ? avc_policy_seqno+0x9/0x20 [ 22.337313] [] ? selinux_file_permission+0x82/0x460 [ 22.343950] [] ? security_file_permission+0x89/0x1e0 [ 22.350667] [] ? rw_verify_area+0xe5/0x2b0 [ 22.356516] [] vfs_read+0x11e/0x380 [ 22.361757] [] SyS_read+0xd9/0x1b0 [ 22.366911] [] ? vfs_copy_file_range+0x740/0x740 [ 22.373281] [] ? do_fast_syscall_32+0xcf/0x890 [ 22.379478] [] ? vfs_copy_file_range+0x740/0x740 [ 22.385849] [] do_fast_syscall_32+0x2f7/0x890 [ 22.391957] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 22.398592] [] entry_SYSENTER_compat+0x51/0x60 [ 22.404784] 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 [ 22.431236] RIP [] __free_pages+0x21/0x80 [ 22.437113] RSP [ 22.440811] ---[ end trace 860b78cb11fb9d43 ]--- [ 22.445548] Kernel panic - not syncing: Fatal exception [ 22.451280] Dumping ftrace buffer: [ 22.454792] (ftrace buffer empty) [ 22.458466] Kernel Offset: disabled [ 22.462059] Rebooting in 86400 seconds..