[....] Starting enhanced syslogd: rsyslogd[ 10.921744] audit: type=1400 audit(1514761598.985:4): avc: denied { syslog } for pid=3164 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 '10.128.15.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.145408] kasan: CONFIG_KASAN_INLINE enabled [ 38.146113] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.147104] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.147952] Dumping ftrace buffer: [ 38.148424] (ftrace buffer empty) [ 38.148917] Modules linked in: [ 38.149382] CPU: 1 PID: 3338 Comm: syzkaller602019 Not tainted 4.9.73-gf3f3457 #11 [ 38.150404] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.151645] task: ffff8801cb500000 task.stack: ffff8801ca388000 [ 38.152519] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 38.153623] RSP: 0018:ffff8801ca38f940 EFLAGS: 00010a07 [ 38.154343] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 38.155333] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 38.156317] RBP: ffff8801ca38f950 R08: 0000000000000001 R09: 0000000000000000 [ 38.157282] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 38.158256] R13: 0000000000000020 R14: ffff8801cbea4200 R15: dffffc0000000000 [ 38.159257] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009524840 [ 38.160359] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 38.161134] CR2: 0000000020d84f40 CR3: 00000001c910d000 CR4: 00000000001406e0 [ 38.162098] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.163507] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.164475] Stack: [ 38.164773] ffff8801cb500000 ffff8801cbea4358 ffff8801ca38f9b0 ffffffff82664fc1 [ 38.168194] ffff8801cbea4370 ffffed00397d486b ffffed00397d486e ffff8801cbea4368 [ 38.176144] dead4ead00000000 ffff8801cbea4340 0000000000000000 0000000000000000 [ 38.184088] Call Trace: [ 38.186642] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 38.193098] [] sg_finish_rem_req+0x2b5/0x340 [ 38.199119] [] sg_new_read.isra.20+0x39/0x3e0 [ 38.205226] [] ? sg_get_rq_mark+0x142/0x190 [ 38.211171] [] sg_read+0x8bd/0x1440 [ 38.216416] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.223046] [] ? fsnotify+0xf30/0xf30 [ 38.228464] [] ? avc_policy_seqno+0x9/0x20 [ 38.234320] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 38.241297] [] ? security_file_permission+0x89/0x1e0 [ 38.248021] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.254652] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 38.261284] [] compat_do_readv_writev+0x522/0x760 [ 38.267740] [] ? do_pwritev+0x1a0/0x1a0 [ 38.273330] [] ? sg_ioctl+0x2c30/0x2c30 [ 38.278919] [] ? do_iter_readv_writev+0x400/0x400 [ 38.285377] [] ? __might_sleep+0x95/0x1a0 [ 38.291148] [] ? __fsnotify_parent+0xbc/0x340 [ 38.297276] [] ? avc_policy_seqno+0x9/0x20 [ 38.303127] [] ? fsnotify+0x86/0xf30 [ 38.308455] [] ? fsnotify+0xf30/0xf30 [ 38.313868] [] compat_readv+0xe3/0x150 [ 38.319375] [] do_compat_readv+0xf4/0x1d0 [ 38.325144] [] ? compat_readv+0x150/0x150 [ 38.331167] [] ? SyS_read+0x1b0/0x1b0 [ 38.336588] [] compat_SyS_readv+0x26/0x30 [ 38.342350] [] ? SyS_pwritev2+0x80/0x80 [ 38.347938] [] do_fast_syscall_32+0x2f7/0x890 [ 38.354046] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.361643] [] entry_SYSENTER_compat+0x51/0x60 [ 38.367837] 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 [ 38.394126] RIP [] __free_pages+0x21/0x80 [ 38.400005] RSP [ 38.404125] ---[ end trace 9fbed45efa9c50e5 ]--- [ 38.408868] Kernel panic - not syncing: Fatal exception [ 38.414538] Dumping ftrace buffer: [ 38.418042] (ftrace buffer empty) [ 38.421726] Kernel Offset: disabled [ 38.425326] Rebooting in 86400 seconds..