[....] Starting enhanced syslogd: rsyslogd[ 12.436979] audit: type=1400 audit(1512820197.878:5): avc: denied { syslog } for pid=2990 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: [ 19.429851] audit: type=1400 audit(1512820204.871:6): avc: denied { map } for pid=3130 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-7,10.128.0.6' (ECDSA) to the list of known hosts. executing program [ 25.750946] audit: type=1400 audit(1512820211.192:7): avc: denied { map } for pid=3144 comm="syzkaller514425" path="/root/syzkaller514425458" 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 [ 25.778710] kasan: CONFIG_KASAN_INLINE enabled [ 25.783330] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.790713] general protection fault: 0000 [#1] SMP KASAN [ 25.796227] Dumping ftrace buffer: [ 25.799737] (ftrace buffer empty) [ 25.803413] Modules linked in: [ 25.806571] CPU: 1 PID: 3144 Comm: syzkaller514425 Not tainted 4.15.0-rc2+ #214 [ 25.813980] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.823307] RIP: 0010:page_mapping+0xa4/0x530 [ 25.827762] RSP: 0018:ffff8801c53e7320 EFLAGS: 00010202 [ 25.833091] RAX: 0000000000000004 RBX: 1ffff10038a7ce65 RCX: ffffffff8195002d [ 25.840326] RDX: 0000000000000000 RSI: 1ffff10038a7cf03 RDI: 0000000000000000 [ 25.847560] RBP: ffff8801c53e7470 R08: ffffed0038a6968c R09: ffff8801c534b440 [ 25.854794] R10: ffff8801d869ff18 R11: ffffed0038a6968b R12: 0000000000000000 [ 25.862028] R13: ffff8801c53e7448 R14: dffffc0000000000 R15: 0000000000000020 [ 25.869263] FS: 000000000172e880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 25.877454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.883300] CR2: 0000000020a23000 CR3: 00000001c645c000 CR4: 00000000001406e0 [ 25.890534] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.897770] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.905007] Call Trace: [ 25.907566] ? kstrndup+0xd0/0xd0 [ 25.910991] ? lock_downgrade+0x980/0x980 [ 25.915110] ? trace_hardirqs_off+0xd/0x10 [ 25.919317] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 25.924386] set_page_dirty+0xb9/0x5d0 [ 25.928243] ? __writepage+0xc0/0xc0 [ 25.931920] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.936898] ? trace_hardirqs_on+0xd/0x10 [ 25.941019] ? __rds_conn_create+0x37f/0x17e0 [ 25.945492] ? rds_conn_message_info_send+0x30/0x30 [ 25.950477] rds_atomic_free_op+0xc2/0x330 [ 25.954676] ? rds_rdma_free_op+0x500/0x500 [ 25.958964] ? refcount_sub_and_test+0x115/0x1b0 [ 25.963682] ? refcount_inc+0x50/0x50 [ 25.967452] rds_message_put+0x53c/0x6b0 [ 25.971475] ? kfree+0x1e7/0x250 [ 25.974815] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 25.980751] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 25.984948] ? trace_hardirqs_on+0xd/0x10 [ 25.989066] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.993443] ? __release_sock+0x360/0x360 [ 25.997553] ? lock_sock_nested+0x91/0x110 [ 26.001755] ? rds_conn_create_outgoing+0x3f/0x50 [ 26.006562] rds_sendmsg+0x14ee/0x1f90 [ 26.010432] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.014896] ? sock_has_perm+0x29c/0x400 [ 26.018922] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 26.024252] ? lock_release+0xda0/0xda0 [ 26.028197] ? selinux_socket_sendmsg+0x36/0x40 [ 26.032829] ? security_socket_sendmsg+0x89/0xb0 [ 26.037548] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.042014] sock_sendmsg+0xca/0x110 [ 26.045697] ___sys_sendmsg+0x75b/0x8a0 [ 26.049639] ? copy_msghdr_from_user+0x590/0x590 [ 26.054357] ? lock_downgrade+0x980/0x980 [ 26.058475] ? __fget_light+0x29d/0x390 [ 26.062412] ? fget_raw+0x20/0x20 [ 26.065830] ? __handle_mm_fault+0x3e20/0x3e20 [ 26.070376] ? vmacache_find+0x5f/0x280 [ 26.074315] ? up_read+0x1a/0x40 [ 26.077645] ? __do_page_fault+0x3d6/0xc90 [ 26.081845] ? __local_bh_enable_ip+0x121/0x230 [ 26.086481] ? __fdget+0x18/0x20 [ 26.089813] __sys_sendmsg+0xe5/0x210 [ 26.093576] ? __sys_sendmsg+0xe5/0x210 [ 26.097514] ? SyS_shutdown+0x290/0x290 [ 26.101453] ? __do_page_fault+0xc90/0xc90 [ 26.105661] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.110642] SyS_sendmsg+0x2d/0x50 [ 26.114146] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 26.118864] RIP: 0033:0x43fe49 [ 26.122021] RSP: 002b:00007ffc697fad08 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 26.129692] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe49 [ 26.136925] RDX: 0000000000000000 RSI: 0000000020159fc8 RDI: 0000000000000003 [ 26.144158] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 26.151393] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004017b0 [ 26.158718] R13: 0000000000401840 R14: 0000000000000000 R15: 0000000000000000 [ 26.165960] 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 e3 37 db ff 4c 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 41 04 00 00 4d 8d b5 00 ff ff ff 48 ba 00 [ 26.185027] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c53e7320 [ 26.191047] ---[ end trace e4080728964d2bf7 ]--- [ 26.195819] Kernel panic - not syncing: Fatal exception [ 26.201551] Dumping ftrace buffer: [ 26.205056] (ftrace buffer empty) [ 26.208731] Kernel Offset: disabled [ 26.212321] Rebooting in 86400 seconds..