[....] Starting enhanced syslogd: rsyslogd[ 13.194948] audit: type=1400 audit(1512752035.709:5): avc: denied { syslog } for pid=3005 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 21.159258] audit: type=1400 audit(1512752043.673:6): avc: denied { map } for pid=3146 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-net-kasan-gce-3,10.128.0.41' (ECDSA) to the list of known hosts. executing program [ 27.495796] audit: type=1400 audit(1512752050.010:7): avc: denied { map } for pid=3160 comm="syzkaller380686" path="/root/syzkaller380686298" 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 [ 27.523775] kasan: CONFIG_KASAN_INLINE enabled [ 27.528425] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.535825] general protection fault: 0000 [#1] SMP KASAN [ 27.541346] Dumping ftrace buffer: [ 27.544854] (ftrace buffer empty) [ 27.548532] Modules linked in: [ 27.551700] CPU: 1 PID: 3160 Comm: syzkaller380686 Not tainted 4.15.0-rc2+ #146 [ 27.559112] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.568434] task: 0000000094952207 task.stack: 00000000ad59789b [ 27.574467] RIP: 0010:page_mapping+0xa4/0x530 [ 27.578928] RSP: 0018:ffff8801c4447320 EFLAGS: 00010202 [ 27.584259] RAX: 0000000000000004 RBX: 1ffff10038888e65 RCX: ffffffff8194c12d [ 27.591495] RDX: 0000000000000000 RSI: 1ffff10038888f03 RDI: 0000000000000000 [ 27.598731] RBP: ffff8801c4447470 R08: ffffed00389d5d6c R09: ffff8801c4eaeb40 [ 27.605967] R10: ffff8801d772b418 R11: ffffed00389d5d6b R12: 0000000000000000 [ 27.613218] R13: ffff8801c4447448 R14: dffffc0000000000 R15: 0000000000000020 [ 27.620458] FS: 0000000000d52880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 27.628651] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.634498] CR2: 0000000020a23000 CR3: 00000001c4a8d000 CR4: 00000000001406e0 [ 27.641739] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.648975] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.656213] Call Trace: [ 27.658775] ? kstrndup+0xd0/0xd0 [ 27.662203] ? lock_downgrade+0x980/0x980 [ 27.666322] ? trace_hardirqs_off+0xd/0x10 [ 27.670523] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 27.675597] set_page_dirty+0xb9/0x5d0 [ 27.679451] ? __writepage+0xc0/0xc0 [ 27.683130] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.688114] ? trace_hardirqs_on+0xd/0x10 [ 27.692233] ? __rds_conn_create+0x376/0x17f0 [ 27.696702] ? rds_conn_message_info_send+0x30/0x30 [ 27.701689] rds_atomic_free_op+0xc2/0x330 [ 27.705892] ? rds_rdma_free_op+0x500/0x500 [ 27.710183] ? refcount_sub_and_test+0x115/0x1b0 [ 27.714906] ? refcount_inc+0x50/0x50 [ 27.718678] rds_message_put+0x53c/0x6b0 [ 27.722705] ? kfree+0x1e7/0x250 [ 27.726042] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 27.731981] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 27.736185] ? trace_hardirqs_on+0xd/0x10 [ 27.740300] ? _raw_spin_unlock_bh+0x30/0x40 [ 27.744677] ? __release_sock+0x360/0x360 [ 27.748789] ? lock_sock_nested+0x91/0x110 [ 27.752993] ? rds_conn_create_outgoing+0x3f/0x50 [ 27.757807] rds_sendmsg+0x14ee/0x1f90 [ 27.761668] ? rds_send_drop_to+0x19d0/0x19d0 [ 27.766143] ? sock_has_perm+0x29c/0x400 [ 27.770173] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 27.775506] ? lock_release+0xda0/0xda0 [ 27.779453] ? selinux_socket_sendmsg+0x36/0x40 [ 27.784089] ? security_socket_sendmsg+0x89/0xb0 [ 27.788813] ? rds_send_drop_to+0x19d0/0x19d0 [ 27.793277] sock_sendmsg+0xca/0x110 [ 27.796958] ___sys_sendmsg+0x75b/0x8a0 [ 27.800904] ? copy_msghdr_from_user+0x590/0x590 [ 27.805628] ? lock_downgrade+0x980/0x980 [ 27.809749] ? __fget_light+0x29d/0x390 [ 27.813690] ? fget_raw+0x20/0x20 [ 27.817124] ? __handle_mm_fault+0x3e20/0x3e20 [ 27.821672] ? vmacache_find+0x5f/0x280 [ 27.825616] ? up_read+0x1a/0x40 [ 27.828952] ? __do_page_fault+0x3d6/0xc90 [ 27.833156] ? __local_bh_enable_ip+0x121/0x230 [ 27.837795] ? __fdget+0x18/0x20 [ 27.841132] __sys_sendmsg+0xe5/0x210 [ 27.844898] ? __sys_sendmsg+0xe5/0x210 [ 27.848841] ? SyS_shutdown+0x290/0x290 [ 27.852782] ? __do_page_fault+0xc90/0xc90 [ 27.856992] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.861980] SyS_sendmsg+0x2d/0x50 [ 27.865492] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 27.870214] RIP: 0033:0x43fe49 [ 27.873370] RSP: 002b:00007ffe8e5f9808 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 27.881044] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe49 [ 27.888283] RDX: 0000000000000000 RSI: 0000000020159fc8 RDI: 0000000000000003 [ 27.895522] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 27.902759] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004017b0 [ 27.909997] R13: 0000000000401840 R14: 0000000000000000 R15: 0000000000000000 [ 27.917247] 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 03 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 [ 27.936314] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c4447320 [ 27.942338] ---[ end trace e97bdf8210b48d5d ]--- [ 27.947128] Kernel panic - not syncing: Fatal exception [ 27.952913] Dumping ftrace buffer: [ 27.956426] (ftrace buffer empty) [ 27.960101] Kernel Offset: disabled [ 27.963696] Rebooting in 86400 seconds..