[....] Starting enhanced syslogd: rsyslogd[ 13.451922] audit: type=1400 audit(1516309070.151:5): avc: denied { syslog } for pid=3497 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: [ 18.952205] audit: type=1400 audit(1516309075.651:6): avc: denied { map } for pid=3636 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 '10.128.15.201' (ECDSA) to the list of known hosts. executing program [ 25.129737] audit: type=1400 audit(1516309081.829:7): avc: denied { map } for pid=3650 comm="syzkaller790771" path="/root/syzkaller790771206" 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 [ 25.132852] kasan: CONFIG_KASAN_INLINE enabled [ 25.132857] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.132867] general protection fault: 0000 [#1] SMP KASAN [ 25.132872] Dumping ftrace buffer: [ 25.132877] (ftrace buffer empty) [ 25.132879] Modules linked in: [ 25.132888] CPU: 0 PID: 3650 Comm: syzkaller790771 Not tainted 4.15.0-rc8+ #178 [ 25.132891] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.132906] RIP: 0010:nfs_idmap_legacy_upcall+0x290/0x4f0 [ 25.132909] RSP: 0018:ffff8801bb487a38 EFLAGS: 00010206 [ 25.132915] RAX: dffffc0000000000 RBX: 1ffff10037690f49 RCX: ffffffff82083117 [ 25.132919] RDX: 0000000000000005 RSI: 1ffff1003775dd33 RDI: 0000000000000028 [ 25.132923] RBP: ffff8801bb487ad0 R08: 1ffff10037690ef6 R09: 0000000000000000 [ 25.132926] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.132930] R13: ffff8801bc1da500 R14: 1ffff10037690f4d R15: ffff8801bba0b180 [ 25.132935] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008f06840 [ 25.132939] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.132943] CR2: 000055a7fd4bb110 CR3: 00000001bbf7f003 CR4: 00000000001606f0 [ 25.132949] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.132952] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.132954] Call Trace: [ 25.132963] ? nfs_idmap_lookup_id+0x190/0x190 [ 25.132984] request_key_and_link+0x10fd/0x16c0 [ 25.132993] ? nfs_idmap_lookup_id+0x190/0x190 [ 25.133006] ? call_sbin_request_key+0xe10/0xe10 [ 25.133018] ? lock_release+0xa40/0xa40 [ 25.133027] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.133035] ? join_session_keyring+0x300/0x300 [ 25.133045] ? rcu_note_context_switch+0x710/0x710 [ 25.133055] ? __might_sleep+0x95/0x190 [ 25.133065] ? keyring_alloc+0xb0/0xb0 [ 25.133073] ? key_default_cmp+0x90/0x90 [ 25.133088] SyS_request_key+0x18c/0x2d0 [ 25.133097] ? SyS_add_key+0x380/0x380 [ 25.133111] ? do_fast_syscall_32+0x156/0xf9d [ 25.133120] ? SyS_add_key+0x380/0x380 [ 25.133127] do_fast_syscall_32+0x3ee/0xf9d [ 25.133139] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.133148] ? kasan_check_read+0x11/0x20 [ 25.133156] ? syscall_return_slowpath+0x550/0x550 [ 25.133165] ? SyS_rt_sigaction+0x94/0x1b0 [ 25.133173] ? SyS_sigprocmask+0x4b0/0x4b0 [ 25.133180] ? SyS_read+0x184/0x220 [ 25.133188] ? retint_user+0x18/0x18 [ 25.133199] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.133211] entry_SYSENTER_compat+0x54/0x63 [ 25.133216] RIP: 0023:0xf7f8dc79 [ 25.133219] RSP: 002b:00000000ffab18ac EFLAGS: 00000286 ORIG_RAX: 000000000000011f [ 25.133225] RAX: ffffffffffffffda RBX: 0000000020005ff6 RCX: 0000000020000000 [ 25.133229] RDX: 0000000020000000 RSI: 00000000fffffffe RDI: 00000000ffffffff [ 25.133232] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.133236] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.133239] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.133253] Code: 89 85 68 ff ff ff 66 41 89 14 06 78 47 e8 79 f9 67 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 [ 25.133366] RIP: nfs_idmap_legacy_upcall+0x290/0x4f0 RSP: ffff8801bb487a38 [ 25.133406] ---[ end trace c86380b1794eb2ac ]--- [ 25.133410] Kernel panic - not syncing: Fatal exception [ 25.156074] Dumping ftrace buffer: [ 25.156077] (ftrace buffer empty) [ 25.156080] Kernel Offset: disabled [ 25.488436] Rebooting in 86400 seconds..