[....] Starting enhanced syslogd: rsyslogd[ 11.485607] audit: type=1400 audit(1514769980.305:4): avc: denied { syslog } for pid=3187 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[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.217' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.473627] kasan: CONFIG_KASAN_INLINE enabled [ 19.478267] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.485606] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 19.491806] Dumping ftrace buffer: [ 19.495329] (ftrace buffer empty) [ 19.499006] Modules linked in: [ 19.502282] CPU: 1 PID: 3335 Comm: syzkaller500303 Not tainted 4.9.73-gf3f3457 #11 [ 19.509952] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.519276] task: ffff8801c9e2b000 task.stack: ffff8801c81e8000 [ 19.525297] RIP: 0010:[] [] __free_pages+0x21/0x80 [ 19.533543] RSP: 0018:ffff8801c81ef940 EFLAGS: 00010a07 [ 19.538968] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff82664f9b [ 19.546210] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 19.553447] RBP: ffff8801c81ef950 R08: 0000000000000001 R09: 0000000000000000 [ 19.560684] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 19.567920] R13: 0000000000000020 R14: ffff8801cdb84200 R15: dffffc0000000000 [ 19.575160] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000914a840 [ 19.583358] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 19.589206] CR2: 0000000020f45fc8 CR3: 00000001cbe9c000 CR4: 00000000001406e0 [ 19.596445] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.603681] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.610916] Stack: [ 19.613032] ffff8801c9e2b000 ffff8801cdb84358 ffff8801c81ef9b0 ffffffff82664fc1 [ 19.621073] ffff8801cdb84370 ffffed0039b7086b ffffed0039b7086e ffff8801cdb84368 [ 19.629058] dead4ead00000000 ffff8801cdb84340 0000000000000000 0000000000000000 [ 19.637009] Call Trace: [ 19.639572] [] sg_remove_scat.isra.19+0x1c1/0x2d0 [ 19.646040] [] sg_finish_rem_req+0x2b5/0x340 [ 19.652079] [] sg_new_read.isra.20+0x39/0x3e0 [ 19.658191] [] ? sg_get_rq_mark+0x142/0x190 [ 19.664126] [] sg_read+0x8bd/0x1440 [ 19.669369] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.676004] [] ? fsnotify+0xf30/0xf30 [ 19.681438] [] ? avc_policy_seqno+0x9/0x20 [ 19.687292] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 19.694272] [] ? security_file_permission+0x89/0x1e0 [ 19.700990] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.707631] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 19.714273] [] compat_do_readv_writev+0x522/0x760 [ 19.720740] [] ? do_pwritev+0x1a0/0x1a0 [ 19.726330] [] ? __lru_cache_add+0x187/0x250 [ 19.732365] [] ? _raw_spin_unlock+0x2c/0x50 [ 19.738302] [] compat_readv+0xe3/0x150 [ 19.743804] [] do_compat_readv+0xf4/0x1d0 [ 19.749568] [] ? compat_readv+0x150/0x150 [ 19.755333] [] compat_SyS_readv+0x26/0x30 [ 19.761096] [] ? SyS_pwritev2+0x80/0x80 [ 19.766688] [] do_fast_syscall_32+0x2f7/0x890 [ 19.772797] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 19.779440] [] entry_SYSENTER_compat+0x51/0x60 [ 19.785635] 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 [ 19.812046] RIP [] __free_pages+0x21/0x80 [ 19.817935] RSP [ 19.822019] ---[ end trace c41b75695dd637aa ]--- [ 19.826774] Kernel panic - not syncing: Fatal exception [ 19.832591] Dumping ftrace buffer: [ 19.836100] (ftrace buffer empty) [ 19.839778] Kernel Offset: disabled [ 19.843372] Rebooting in 86400 seconds..