[....] Starting enhanced syslogd: rsyslogd[ 16.843338] audit: type=1400 audit(1520678650.744:5): avc: denied { syslog } for pid=4084 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: [ 19.215791] audit: type=1400 audit(1520678653.116:6): avc: denied { map } for pid=4222 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.877399] audit: type=1400 audit(1520678672.778:7): avc: denied { map } for pid=4239 comm="syzkaller710726" path="/root/syzkaller710726130" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 42.204133] kasan: CONFIG_KASAN_INLINE enabled [ 42.208860] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.216245] general protection fault: 0000 [#1] SMP KASAN [ 42.221756] Dumping ftrace buffer: [ 42.225265] (ftrace buffer empty) [ 42.228948] Modules linked in: [ 42.232116] CPU: 1 PID: 4240 Comm: syzkaller710726 Not tainted 4.16.0-rc4+ #348 [ 42.239532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.248877] RIP: 0010:rdma_listen+0x2ed/0x8e0 executing program [ 42.253343] RSP: 0018:ffff8801b03e7998 EFLAGS: 00010202 [ 42.258678] RAX: dffffc0000000000 RBX: ffff8801d3824d80 RCX: 0000000000000000 [ 42.265918] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000008 [ 42.273175] RBP: ffff8801b03e7a30 R08: ffffffff841d8748 R09: 0000000000000004 [ 42.280420] R10: ffff8801b03e7988 R11: 0000000000000002 R12: 1ffff1003607cf35 [ 42.287665] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400 [ 42.294909] FS: 00007fc1be1df700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 executing program [ 42.303109] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.308961] CR2: 00007fc1be1bde78 CR3: 00000001b035c003 CR4: 00000000001606e0 [ 42.316221] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.323464] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.330705] Call Trace: [ 42.333283] ? rdma_resolve_addr+0x26c0/0x26c0 [ 42.337844] ucma_listen+0x172/0x1f0 [ 42.341535] ? ucma_accept+0x970/0x970 [ 42.345396] ? kasan_check_write+0x14/0x20 [ 42.349600] ? _copy_from_user+0x99/0x110 executing program executing program [ 42.353718] ucma_write+0x2d6/0x3d0 [ 42.357314] ? ucma_accept+0x970/0x970 [ 42.361172] ? ucma_resolve_route+0x1a0/0x1a0 [ 42.365641] ? ucma_resolve_route+0x1a0/0x1a0 [ 42.370106] __vfs_write+0xef/0x970 [ 42.373708] ? rcu_note_context_switch+0x710/0x710 [ 42.378608] ? kernel_read+0x120/0x120 [ 42.382469] ? __might_sleep+0x95/0x190 [ 42.386433] ? _cond_resched+0x14/0x30 [ 42.390293] ? __inode_security_revalidate+0xd9/0x130 [ 42.395457] ? avc_policy_seqno+0x9/0x20 [ 42.399487] ? selinux_file_permission+0x82/0x460 executing program [ 42.404308] ? security_file_permission+0x89/0x1e0 [ 42.409218] ? rw_verify_area+0xe5/0x2b0 [ 42.413250] ? __fdget_raw+0x20/0x20 [ 42.416938] vfs_write+0x189/0x510 [ 42.420455] SyS_write+0xef/0x220 [ 42.423879] ? exit_to_usermode_loop+0x198/0x2f0 [ 42.428606] ? SyS_read+0x220/0x220 [ 42.432216] ? do_syscall_64+0xb7/0x940 [ 42.436160] ? SyS_read+0x220/0x220 [ 42.439756] do_syscall_64+0x281/0x940 [ 42.443621] ? __do_page_fault+0xc90/0xc90 [ 42.447826] ? _raw_spin_unlock_irq+0x27/0x70 executing program [ 42.452292] ? finish_task_switch+0x1c1/0x7e0 [ 42.456759] ? syscall_return_slowpath+0x550/0x550 [ 42.461661] ? syscall_return_slowpath+0x2ac/0x550 [ 42.466560] ? prepare_exit_to_usermode+0x350/0x350 [ 42.471547] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 42.476884] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.481700] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 42.486857] RIP: 0033:0x445799 [ 42.490020] RSP: 002b:00007fc1be1deda8 EFLAGS: 00000297 ORIG_RAX: 0000000000000001 [ 42.497696] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445799 [ 42.504935] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 00000000000003ff [ 42.512175] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 42.519419] R10: 0000000000000000 R11: 0000000000000297 R12: 006d635f616d6472 [ 42.526662] R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 0000000000000005 [ 42.533910] Code: 00 4c 8b ab c0 01 00 00 31 f6 48 c7 c7 20 9a 44 87 e8 f8 9b ab 01 48 b8 00 00 00 00 00 fc ff df 49 8d 7d 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 30 05 00 00 4d 8b 75 08 48 b8 00 00 00 00 00 [ 42.552978] RIP: rdma_listen+0x2ed/0x8e0 RSP: ffff8801b03e7998 [ 42.558991] ---[ end trace d2dd984bca817351 ]--- [ 42.563736] Kernel panic - not syncing: Fatal exception [ 42.569442] Dumping ftrace buffer: [ 42.572952] (ftrace buffer empty) [ 42.576635] Kernel Offset: disabled [ 42.580234] Rebooting in 86400 seconds..