[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 12.578409] sshd (3023) used greatest stack depth: 14504 bytes left [....] 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: [ 34.222342] audit: type=1400 audit(1512751205.108:6): avc: denied { map } for pid=3137 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-mmots-kasan-gce-0,10.128.0.37' (ECDSA) to the list of known hosts. executing program [ 56.006927] audit: type=1400 audit(1512751226.892:7): avc: denied { map } for pid=3149 comm="syzkaller233597" path="/root/syzkaller233597068" 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 [ 56.034726] kasan: CONFIG_KASAN_INLINE enabled [ 56.039427] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 56.046824] general protection fault: 0000 [#1] SMP KASAN [ 56.052332] Dumping ftrace buffer: [ 56.055839] (ftrace buffer empty) [ 56.059520] Modules linked in: [ 56.062683] CPU: 0 PID: 3149 Comm: syzkaller233597 Not tainted 4.15.0-rc2-mm1+ #39 [ 56.070971] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.080316] RIP: 0010:page_mapping+0xa4/0x530 [ 56.084778] RSP: 0018:ffff8801c5177320 EFLAGS: 00010202 [ 56.090193] RAX: 0000000000000004 RBX: 1ffff10038a2ee65 RCX: ffffffff81950c5d [ 56.097435] RDX: 0000000000000000 RSI: 1ffff10038a2ef03 RDI: 0000000000000000 [ 56.104671] RBP: ffff8801c5177470 R08: ffffed0038a6fbac R09: ffff8801c537dd40 [ 56.111906] R10: ffff8801d6e8c518 R11: ffffed0038a6fbab R12: 0000000000000000 [ 56.119144] R13: ffff8801c5177448 R14: dffffc0000000000 R15: 0000000000000020 [ 56.127252] FS: 00000000021da880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 56.135443] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.141292] CR2: 0000000020a23000 CR3: 00000001c6bf5000 CR4: 00000000001406f0 [ 56.148530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.155768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.163005] Call Trace: [ 56.165566] ? kstrndup+0xd0/0xd0 [ 56.168998] ? lock_downgrade+0x980/0x980 [ 56.173116] ? trace_hardirqs_off+0xd/0x10 [ 56.177318] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 56.182400] set_page_dirty+0xb9/0x5d0 [ 56.186257] ? __writepage+0xc0/0xc0 [ 56.189936] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 56.194919] ? trace_hardirqs_on+0xd/0x10 [ 56.199038] ? __rds_conn_create+0x376/0x17f0 [ 56.203520] ? rds_conn_message_info_send+0x30/0x30 [ 56.208505] rds_atomic_free_op+0xc2/0x330 [ 56.212706] ? rds_rdma_free_op+0x500/0x500 [ 56.217000] ? refcount_sub_and_test+0x115/0x1b0 [ 56.221726] ? refcount_inc+0x50/0x50 [ 56.225499] rds_message_put+0x53c/0x6b0 [ 56.229529] ? kfree+0x1e7/0x250 [ 56.232862] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 56.238810] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 56.243016] ? trace_hardirqs_on+0xd/0x10 [ 56.247131] ? _raw_spin_unlock_bh+0x30/0x40 [ 56.251509] ? __release_sock+0x360/0x360 [ 56.255621] ? lock_sock_nested+0x91/0x110 [ 56.259825] ? rds_conn_create_outgoing+0x3f/0x50 [ 56.264635] rds_sendmsg+0x14ee/0x1f90 [ 56.268496] ? rds_send_drop_to+0x19d0/0x19d0 [ 56.272975] ? sock_has_perm+0x29c/0x400 [ 56.277015] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 56.282350] ? lock_release+0xda0/0xda0 [ 56.286297] ? selinux_socket_sendmsg+0x36/0x40 [ 56.290935] ? security_socket_sendmsg+0x89/0xb0 [ 56.295665] ? rds_send_drop_to+0x19d0/0x19d0 [ 56.300224] sock_sendmsg+0xca/0x110 [ 56.303907] ___sys_sendmsg+0x75b/0x8a0 [ 56.307850] ? copy_msghdr_from_user+0x590/0x590 [ 56.312574] ? lock_downgrade+0x980/0x980 [ 56.316696] ? __fget_light+0x29d/0x390 [ 56.320638] ? fget_raw+0x20/0x20 [ 56.324058] ? __handle_mm_fault+0x3dd0/0x3dd0 [ 56.328607] ? vmacache_find+0x5f/0x280 [ 56.332551] ? up_read+0x1a/0x40 [ 56.335887] ? __do_page_fault+0x3d6/0xc90 [ 56.340087] ? __local_bh_enable_ip+0x121/0x230 [ 56.344913] ? __fdget+0x18/0x20 [ 56.348257] __sys_sendmsg+0xe5/0x210 [ 56.352030] ? __sys_sendmsg+0xe5/0x210 [ 56.355971] ? SyS_shutdown+0x290/0x290 [ 56.359914] ? __do_page_fault+0xc90/0xc90 [ 56.364123] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 56.369110] SyS_sendmsg+0x2d/0x50 [ 56.372628] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 56.377353] RIP: 0033:0x43fe49 [ 56.380512] RSP: 002b:00007fffab075338 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 56.388185] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe49 [ 56.397158] RDX: 0000000000000000 RSI: 0000000020159fc8 RDI: 0000000000000003 [ 56.404396] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 56.411634] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004017b0 [ 56.418872] R13: 0000000000401840 R14: 0000000000000000 R15: 0000000000000000 [ 56.426120] 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 43 29 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 [ 56.445194] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c5177320 [ 56.451178] ---[ end trace f878597b0d0664a0 ]--- [ 56.455957] Kernel panic - not syncing: Fatal exception [ 56.461361] Dumping ftrace buffer: [ 56.464902] (ftrace buffer empty) [ 56.468580] Kernel Offset: disabled [ 56.472180] Rebooting in 86400 seconds..