[....] Starting enhanced syslogd: rsyslogd[ 13.841257] audit: type=1400 audit(1516305705.075:5): avc: denied { syslog } for pid=3509 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 syzkaller login: [ 19.387696] audit: type=1400 audit(1516305710.621:6): avc: denied { map } for pid=3651 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. executing program [ 25.701055] audit: type=1400 audit(1516305716.934:7): avc: denied { map } for pid=3665 comm="syzkaller726012" path="/root/syzkaller726012348" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 25.704783] kasan: CONFIG_KASAN_INLINE enabled [ 25.704788] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.704797] general protection fault: 0000 [#1] SMP KASAN [ 25.704803] Dumping ftrace buffer: [ 25.704807] (ftrace buffer empty) [ 25.704810] Modules linked in: [ 25.704819] CPU: 0 PID: 3665 Comm: syzkaller726012 Not tainted 4.15.0-rc7-mm1+ #56 [ 25.704823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.704840] RIP: 0010:nfs_idmap_legacy_upcall+0x290/0x4f0 [ 25.704844] RSP: 0018:ffff8801d9bb7bd0 EFLAGS: 00010206 [ 25.704850] RAX: dffffc0000000000 RBX: 1ffff1003b376f7c RCX: ffffffff820a1de7 [ 25.704854] RDX: 0000000000000005 RSI: 1ffff1003b08a9db RDI: 0000000000000028 [ 25.704858] RBP: ffff8801d9bb7c68 R08: 1ffff1003b376f29 R09: 0000000000000000 [ 25.704861] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.704866] R13: ffff8801d9027900 R14: 1ffff1003b376f80 R15: ffff8801d9985c80 [ 25.704871] FS: 0000000000b15880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.704875] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.704879] CR2: 000055c44ecd80f0 CR3: 00000001d43ad006 CR4: 00000000001606f0 [ 25.704887] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.704890] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.704892] Call Trace: [ 25.704903] ? nfs_idmap_lookup_id+0x190/0x190 [ 25.704921] request_key_and_link+0x10fd/0x16c0 [ 25.704932] ? nfs_idmap_lookup_id+0x190/0x190 [ 25.704941] ? call_sbin_request_key+0xe10/0xe10 [ 25.704952] ? lock_release+0xa40/0xa40 [ 25.704962] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.704969] ? join_session_keyring+0x300/0x300 [ 25.704987] ? keyring_alloc+0xb0/0xb0 [ 25.704995] ? key_default_cmp+0x90/0x90 [ 25.705014] SyS_request_key+0x18c/0x2d0 [ 25.705022] ? SyS_add_key+0x380/0x380 [ 25.705036] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.705050] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.705056] RIP: 0033:0x43fce9 [ 25.705059] RSP: 002b:00007ffd59bfff28 EFLAGS: 00000217 ORIG_RAX: 00000000000000f9 [ 25.705065] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fce9 [ 25.705069] RDX: 0000000020000000 RSI: 0000000020000000 RDI: 0000000020005ff6 [ 25.705072] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 25.705076] R10: 00000000fffffffe R11: 0000000000000217 R12: 0000000000401610 [ 25.705080] R13: 00000000004016a0 R14: 0000000000000000 R15: 0000000000000000 [ 25.705094] Code: 89 85 68 ff ff ff 66 41 89 14 06 78 47 e8 29 7a 66 ff 48 8b 85 70 ff ff ff 48 8d 78 28 48 8b 85 68 ff ff ff 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 39 02 00 00 48 8b 85 70 ff ff ff 48 83 78 28 [ 25.705214] RIP: nfs_idmap_legacy_upcall+0x290/0x4f0 RSP: ffff8801d9bb7bd0 [ 25.705248] ---[ end trace 03b83b2903562f9f ]--- [ 25.705252] Kernel panic - not syncing: Fatal exception [ 25.727418] Dumping ftrace buffer: [ 25.727421] (ftrace buffer empty) [ 25.727424] Kernel Offset: disabled [ 26.009555] Rebooting in 86400 seconds..