[....] Starting enhanced syslogd: rsyslogd[ 9.707532] audit: type=1400 audit(1514924754.390:4): avc: denied { syslog } for pid=3162 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 '10.128.15.210' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.642126] kasan: CONFIG_KASAN_INLINE enabled [ 33.642890] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.643859] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.644677] Dumping ftrace buffer: [ 33.645150] (ftrace buffer empty) [ 33.645643] Modules linked in: [ 33.646106] CPU: 1 PID: 3336 Comm: syzkaller907408 Not tainted 4.9.73-gf3f3457 #11 [ 33.647112] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.648345] task: ffff8801c7ab9800 task.stack: ffff8801cce68000 [ 33.649139] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 33.650245] RSP: 0018:ffff8801cce6f940 EFLAGS: 00010a07 [ 33.650963] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 33.651914] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 33.652866] RBP: ffff8801cce6f950 R08: 0000000000000001 R09: 0000000000000000 [ 33.653816] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 33.654765] R13: 0000000000000020 R14: ffff8801c9eba100 R15: dffffc0000000000 [ 33.655718] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000008922840 [ 33.656789] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.657566] CR2: 0000000020b0f000 CR3: 00000001c9460000 CR4: 00000000001406e0 [ 33.658520] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.659470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.660419] Stack: [ 33.660713] ffff8801c7ab9800 ffff8801c9eba258 ffff8801cce6f9b0 ffffffff82664fc1 [ 33.661854] ffff8801c9eba270 ffffed00393d744b ffffed00393d744e ffff8801c9eba268 [ 33.667333] dead4ead00000000 ffff8801c9eba240 0000000000000000 0000000000000000 [ 33.675278] Call Trace: [ 33.677834] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 33.684289] [] sg_finish_rem_req+0x2b5/0x340 [ 33.690313] [] sg_new_read.isra.20+0x39/0x3e0 [ 33.696423] [] ? sg_get_rq_mark+0x142/0x190 [ 33.702359] [] sg_read+0x8bd/0x1440 [ 33.707599] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.714236] [] ? fsnotify+0xf30/0xf30 [ 33.719653] [] ? avc_policy_seqno+0x9/0x20 [ 33.725766] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 33.732749] [] ? security_file_permission+0x89/0x1e0 [ 33.739465] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.746117] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 33.752755] [] compat_do_readv_writev+0x522/0x760 [ 33.759214] [] ? do_pwritev+0x1a0/0x1a0 [ 33.765152] [] ? sg_ioctl+0x2c30/0x2c30 [ 33.770739] [] ? do_iter_readv_writev+0x400/0x400 [ 33.778941] [] ? __might_sleep+0x95/0x1a0 [ 33.786353] [] ? __inode_security_revalidate+0xd9/0x130 [ 33.793332] [] ? __fsnotify_parent+0xbc/0x340 [ 33.799439] [] ? avc_policy_seqno+0x9/0x20 [ 33.805287] [] ? fsnotify+0x86/0xf30 [ 33.810615] [] ? fsnotify+0xf30/0xf30 [ 33.816032] [] compat_readv+0xe3/0x150 [ 33.821542] [] do_compat_readv+0xf4/0x1d0 [ 33.827311] [] ? compat_readv+0x150/0x150 [ 33.833071] [] ? SyS_read+0x1b0/0x1b0 [ 33.838491] [] compat_SyS_readv+0x26/0x30 [ 33.844255] [] ? SyS_pwritev2+0x80/0x80 [ 33.849841] [] do_fast_syscall_32+0x2f7/0x890 [ 33.856209] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.862838] [] entry_SYSENTER_compat+0x51/0x60 [ 33.869029] 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 [ 33.896179] RIP [] __free_pages+0x21/0x80 [ 33.902056] RSP [ 33.905873] ---[ end trace 5bcc5bd884e82a72 ]--- [ 33.910645] Kernel panic - not syncing: Fatal exception [ 33.916379] Dumping ftrace buffer: [ 33.919889] (ftrace buffer empty) [ 33.923570] Kernel Offset: disabled [ 33.927162] Rebooting in 86400 seconds..