[....] Starting enhanced syslogd: rsyslogd[ 11.107609] audit: type=1400 audit(1513613050.097:5): avc: denied { syslog } for pid=2986 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: [ 13.275007] audit: type=1400 audit(1513613052.264:6): avc: denied { map } for pid=3125 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 'ci-upstream-kasan-gce-4,10.128.15.192' (ECDSA) to the list of known hosts. executing program [ 27.963516] audit: type=1400 audit(1513613066.953:7): avc: denied { map } for pid=3142 comm="syzkaller235630" path="/root/syzkaller235630333" 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 [ 27.991173] kasan: CONFIG_KASAN_INLINE enabled [ 27.995979] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.003342] general protection fault: 0000 [#1] SMP KASAN [ 28.008846] Dumping ftrace buffer: [ 28.012350] (ftrace buffer empty) [ 28.016027] Modules linked in: [ 28.019188] CPU: 0 PID: 3142 Comm: syzkaller235630 Not tainted 4.15.0-rc4+ #227 [ 28.026600] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.035926] RIP: 0010:page_mapping+0xa4/0x530 [ 28.040391] RSP: 0018:ffff8801ca5d7320 EFLAGS: 00010202 [ 28.045719] RAX: 0000000000000004 RBX: 1ffff100394bae65 RCX: ffffffff81949ded [ 28.052955] RDX: 0000000000000000 RSI: 1ffff100394baf03 RDI: 0000000000000000 [ 28.060188] RBP: ffff8801ca5d7470 R08: ffffed00394d1972 R09: ffff8801ca68cb70 [ 28.067423] R10: ffff8801ca855888 R11: ffffed00394d1971 R12: 0000000000000000 [ 28.074659] R13: ffff8801ca5d7448 R14: dffffc0000000000 R15: 0000000000000020 [ 28.081897] FS: 0000000000f8a880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 28.090086] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.095931] CR2: 0000000020fc8000 CR3: 00000001db156001 CR4: 00000000001606f0 [ 28.103167] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.110400] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.117632] Call Trace: [ 28.120186] ? kstrndup+0xd0/0xd0 [ 28.123612] ? find_held_lock+0x35/0x1d0 [ 28.127650] ? __rds_conn_create+0xf98/0x17d0 [ 28.132115] ? lock_downgrade+0x980/0x980 [ 28.136227] ? trace_hardirqs_off+0xd/0x10 [ 28.140426] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 28.145494] set_page_dirty+0xb9/0x5d0 [ 28.149345] ? __writepage+0xc0/0xc0 [ 28.153029] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.158012] ? trace_hardirqs_on+0xd/0x10 [ 28.162127] ? __rds_conn_create+0x37f/0x17d0 [ 28.166596] ? rds_conn_message_info_send+0x30/0x30 [ 28.171577] rds_atomic_free_op+0xc2/0x330 [ 28.175776] ? rds_rdma_free_op+0x500/0x500 [ 28.180061] ? refcount_sub_and_test+0x115/0x1b0 [ 28.184787] ? refcount_inc+0x50/0x50 [ 28.188556] rds_message_put+0x53c/0x6b0 [ 28.192581] ? kfree+0x1e7/0x250 [ 28.195911] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 28.201847] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 28.206045] ? trace_hardirqs_on+0xd/0x10 [ 28.210163] ? _raw_spin_unlock_bh+0x30/0x40 [ 28.214538] ? __release_sock+0x360/0x360 [ 28.218654] ? lock_sock_nested+0x91/0x110 [ 28.222855] ? rds_conn_create_outgoing+0x3f/0x50 [ 28.227663] rds_sendmsg+0x14ee/0x1f90 [ 28.231520] ? rds_send_drop_to+0x19d0/0x19d0 [ 28.235981] ? find_held_lock+0x35/0x1d0 [ 28.240010] ? sock_has_perm+0x29c/0x400 [ 28.244042] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 28.249366] ? lock_downgrade+0x980/0x980 [ 28.253477] ? lock_release+0xa40/0xa40 [ 28.257421] ? selinux_socket_sendmsg+0x36/0x40 [ 28.262051] ? security_socket_sendmsg+0x89/0xb0 [ 28.266769] ? rds_send_drop_to+0x19d0/0x19d0 [ 28.271227] sock_sendmsg+0xca/0x110 [ 28.274907] ___sys_sendmsg+0x755/0x890 [ 28.278847] ? copy_msghdr_from_user+0x590/0x590 [ 28.283578] ? __do_page_fault+0x5f7/0xc90 [ 28.287778] ? lock_downgrade+0x980/0x980 [ 28.291902] ? fget_raw+0x20/0x20 [ 28.295320] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 28.299865] ? vmacache_find+0x5f/0x280 [ 28.303816] ? up_read+0x1a/0x40 [ 28.307150] ? __do_page_fault+0x3d6/0xc90 [ 28.311349] ? __local_bh_enable_ip+0x121/0x230 [ 28.315985] ? __fdget+0x18/0x20 [ 28.319318] __sys_sendmsg+0xe5/0x210 [ 28.323082] ? __sys_sendmsg+0xe5/0x210 [ 28.327027] ? SyS_shutdown+0x290/0x290 [ 28.330967] ? __do_page_fault+0xc90/0xc90 [ 28.335173] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.340154] SyS_sendmsg+0x2d/0x50 [ 28.343663] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 28.348381] RIP: 0033:0x43fea9 [ 28.351536] RSP: 002b:00007ffc603ac968 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 28.359207] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fea9 [ 28.366440] RDX: 0000000000000000 RSI: 0000000020002000 RDI: 0000000000000003 [ 28.373675] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 28.380912] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 28.388144] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 28.395391] Code: f2 f2 f2 c7 40 14 00 f2 f2 f2 c7 40 18 f2 f2 f2 f2 c7 40 1c 00 f2 f2 f2 c7 40 20 f3 f3 f3 f3 e8 d3 37 db ff 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 3c 04 00 00 4d 8d b5 00 ff ff ff 48 ba 00 [ 28.414461] RIP: page_mapping+0xa4/0x530 RSP: ffff8801ca5d7320 [ 28.420461] ---[ end trace 3630832bd9a1166a ]--- [ 28.425229] Kernel panic - not syncing: Fatal exception [ 28.430612] Dumping ftrace buffer: [ 28.434139] (ftrace buffer empty) [ 28.437820] Kernel Offset: disabled [ 28.441415] Rebooting in 86400 seconds..