[....] Starting enhanced syslogd: rsyslogd[ 15.850239] audit: type=1400 audit(1521188659.460:5): avc: denied { syslog } for pid=4033 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.437692] audit: type=1400 audit(1521188662.048:6): avc: denied { map } for pid=4171 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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 41.189334] audit: type=1400 audit(1521188684.800:7): avc: denied { map } for pid=4189 comm="syzkaller901248" path="/root/syzkaller901248759" 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 [ 41.221352] kasan: CONFIG_KASAN_INLINE enabled [ 41.226213] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.233753] general protection fault: 0000 [#1] SMP KASAN [ 41.239265] Dumping ftrace buffer: [ 41.242775] (ftrace buffer empty) [ 41.246459] Modules linked in: [ 41.249629] CPU: 0 PID: 4193 Comm: syzkaller901248 Not tainted 4.16.0-rc5+ #355 [ 41.257041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.266378] RIP: 0010:rdma_reject+0x37/0x220 [ 41.270754] RSP: 0018:ffff8801b361f8f8 EFLAGS: 00010206 [ 41.276105] RAX: dffffc0000000000 RBX: 1ffff100366c3f29 RCX: ffffffff841bd2bf [ 41.283343] RDX: 0000000000000078 RSI: ffff8801b361f970 RDI: 00000000000003c0 [ 41.290580] RBP: ffff8801b361f928 R08: 0000000000000000 R09: 0000000000000000 [ 41.297819] R10: ffffffff886133c0 R11: 0000000000000000 R12: 0000000000000077 [ 41.305059] R13: ffff8801b361faa8 R14: ffff8801b361f970 R15: 0000000000000000 [ 41.312298] FS: 00007fa1e5fa1700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 41.320491] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.326339] CR2: 00007fa1e5f7fdb8 CR3: 00000001b9136004 CR4: 00000000001606f0 [ 41.333578] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.340816] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.348052] Call Trace: [ 41.350613] ucma_reject+0x149/0x220 [ 41.354296] ? ucma_disconnect+0x150/0x150 [ 41.358512] ? kasan_check_write+0x14/0x20 [ 41.362715] ucma_write+0x2d6/0x3d0 [ 41.366307] ? ucma_disconnect+0x150/0x150 [ 41.370508] ? ucma_resolve_route+0x1a0/0x1a0 [ 41.374974] ? ucma_resolve_route+0x1a0/0x1a0 [ 41.379446] __vfs_write+0xef/0x970 [ 41.383052] ? rcu_note_context_switch+0x710/0x710 [ 41.387949] ? kernel_read+0x120/0x120 [ 41.391893] ? __might_sleep+0x95/0x190 [ 41.395836] ? _cond_resched+0x14/0x30 [ 41.399695] ? __inode_security_revalidate+0xd9/0x130 [ 41.404854] ? avc_policy_seqno+0x9/0x20 [ 41.408883] ? selinux_file_permission+0x82/0x460 [ 41.413696] ? security_file_permission+0x89/0x1e0 [ 41.418596] ? rw_verify_area+0xe5/0x2b0 [ 41.422631] ? __fdget_raw+0x20/0x20 [ 41.426313] vfs_write+0x189/0x510 [ 41.429825] SyS_write+0xef/0x220 [ 41.433248] ? filp_open+0x70/0x70 [ 41.436765] ? SyS_read+0x220/0x220 [ 41.440366] ? do_syscall_64+0xb7/0x940 [ 41.444307] ? SyS_read+0x220/0x220 [ 41.447902] do_syscall_64+0x281/0x940 [ 41.451758] ? _raw_spin_unlock_irq+0x27/0x70 [ 41.456226] ? finish_task_switch+0x1c1/0x7e0 [ 41.460693] ? syscall_return_slowpath+0x550/0x550 [ 41.465590] ? syscall_return_slowpath+0x2ac/0x550 [ 41.470495] ? prepare_exit_to_usermode+0x350/0x350 [ 41.475480] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 41.480816] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.485632] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.490789] RIP: 0033:0x445b29 [ 41.493970] RSP: 002b:00007fa1e5fa0ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.501653] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445b29 [ 41.508893] RDX: 0000000000000110 RSI: 0000000020000440 RDI: 0000000000000003 [ 41.516130] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 41.523369] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 41.530607] R13: 00007ffc87896bcf R14: 00007fa1e5fa19c0 R15: 0000000000000004 executing program [ 41.537863] Code: 49 89 ff 53 41 89 d4 49 89 f6 48 83 ec 08 e8 e1 44 55 fd 49 8d bf c0 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a0 01 00 00 4d 8b af c0 03 00 00 4d 85 ed 0f [ 41.556934] RIP: rdma_reject+0x37/0x220 RSP: ffff8801b361f8f8 [ 41.562856] ---[ end trace 64f6e283f928b89b ]--- [ 41.567598] Kernel panic - not syncing: Fatal exception [ 41.573278] Dumping ftrace buffer: [ 41.576787] (ftrace buffer empty) [ 41.580477] Kernel Offset: disabled [ 41.584081] Rebooting in 86400 seconds..