[ 12.963680] audit: type=1400 audit(1513165098.051:5): avc: denied { syslog } for pid=2992 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?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: [ 18.392079] audit: type=1400 audit(1513165103.479:6): 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-net-kasan-gce-2,10.128.0.7' (ECDSA) to the list of known hosts. executing program [ 24.719929] audit: type=1400 audit(1513165109.807:7): avc: denied { map } for pid=3151 comm="syzkaller206093" path="/root/syzkaller206093984" 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 [ 24.748156] kasan: CONFIG_KASAN_INLINE enabled [ 24.752758] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.760130] general protection fault: 0000 [#1] SMP KASAN [ 24.765641] Dumping ftrace buffer: [ 24.769145] (ftrace buffer empty) [ 24.772819] Modules linked in: [ 24.775978] CPU: 0 PID: 3151 Comm: syzkaller206093 Not tainted 4.15.0-rc2+ #151 [ 24.783386] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.792710] RIP: 0010:page_mapping+0xa4/0x530 [ 24.797185] RSP: 0018:ffff8801c4cf7320 EFLAGS: 00010202 [ 24.802511] RAX: 0000000000000004 RBX: 1ffff1003899ee65 RCX: ffffffff819501ed [ 24.809747] RDX: 0000000000000000 RSI: 1ffff1003899ef03 RDI: 0000000000000000 [ 24.816987] RBP: ffff8801c4cf7470 R08: ffffed0038986b24 R09: ffff8801c4c35900 [ 24.824223] R10: ffff8801c51f0c48 R11: ffffed0038986b23 R12: 0000000000000000 [ 24.831456] R13: ffff8801c4cf7448 R14: dffffc0000000000 R15: 0000000000000020 [ 24.838693] FS: 0000000001d1b880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 24.846881] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.852728] CR2: 0000000020c07000 CR3: 00000001c4dea000 CR4: 00000000001406f0 [ 24.859966] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.867202] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.874438] Call Trace: [ 24.876997] ? kstrndup+0xd0/0xd0 [ 24.880433] ? lock_downgrade+0x980/0x980 [ 24.884554] ? trace_hardirqs_off+0xd/0x10 [ 24.888755] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 24.893830] set_page_dirty+0xb9/0x5d0 [ 24.897684] ? __writepage+0xc0/0xc0 [ 24.901365] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.906345] ? trace_hardirqs_on+0xd/0x10 [ 24.910459] ? __rds_conn_create+0x376/0x17f0 [ 24.914929] ? rds_conn_message_info_send+0x30/0x30 [ 24.919914] rds_atomic_free_op+0xc2/0x330 [ 24.924113] ? rds_rdma_free_op+0x500/0x500 [ 24.928404] ? refcount_sub_and_test+0x115/0x1b0 [ 24.933127] ? refcount_inc+0x50/0x50 [ 24.936898] rds_message_put+0x53c/0x6b0 [ 24.940926] ? kfree+0x1e7/0x250 [ 24.944258] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 24.950193] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 24.954398] ? trace_hardirqs_on+0xd/0x10 [ 24.958513] ? _raw_spin_unlock_bh+0x30/0x40 [ 24.962890] ? __release_sock+0x360/0x360 [ 24.967005] ? lock_sock_nested+0x91/0x110 [ 24.971212] ? rds_conn_create_outgoing+0x3f/0x50 [ 24.976028] rds_sendmsg+0x14ee/0x1f90 [ 24.979891] ? rds_send_drop_to+0x19d0/0x19d0 [ 24.984357] ? sock_has_perm+0x29c/0x400 [ 24.988385] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 24.993718] ? lock_release+0xda0/0xda0 [ 24.997665] ? selinux_socket_sendmsg+0x36/0x40 [ 25.002300] ? security_socket_sendmsg+0x89/0xb0 [ 25.007026] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.011489] sock_sendmsg+0xca/0x110 [ 25.015169] ___sys_sendmsg+0x75b/0x8a0 [ 25.019112] ? copy_msghdr_from_user+0x590/0x590 [ 25.023835] ? lock_downgrade+0x980/0x980 [ 25.027953] ? __fget_light+0x29d/0x390 [ 25.031900] ? fget_raw+0x20/0x20 [ 25.035327] ? __handle_mm_fault+0x3e20/0x3e20 [ 25.039871] ? vmacache_find+0x5f/0x280 [ 25.043816] ? up_read+0x1a/0x40 [ 25.047158] ? __do_page_fault+0x3d6/0xc90 [ 25.051361] ? __fdget+0x18/0x20 [ 25.054695] __sys_sendmsg+0xe5/0x210 [ 25.058460] ? __sys_sendmsg+0xe5/0x210 [ 25.062399] ? SyS_shutdown+0x290/0x290 [ 25.066340] ? __do_page_fault+0xc90/0xc90 [ 25.070555] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.075540] SyS_sendmsg+0x2d/0x50 [ 25.079047] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.083764] RIP: 0033:0x440079 [ 25.086927] RSP: 002b:00007ffc07e13468 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 25.094596] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440079 [ 25.101829] RDX: 0000000000000040 RSI: 000000002048cfe4 RDI: 0000000000000003 [ 25.109066] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 25.116300] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004019e0 [ 25.123534] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 25.130776] 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 23 36 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 [ 25.149843] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c4cf7320 [ 25.155968] ---[ end trace 3e3036a733b4b62c ]--- [ 25.160747] Kernel panic - not syncing: Fatal exception [ 25.166468] Dumping ftrace buffer: [ 25.169980] (ftrace buffer empty) [ 25.173657] Kernel Offset: disabled [ 25.177248] Rebooting in 86400 seconds..