[....] Starting enhanced syslogd: rsyslogd[ 12.883265] audit: type=1400 audit(1513175843.725:5): avc: denied { syslog } for pid=2991 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: [ 17.405250] audit: type=1400 audit(1513175848.246:6): avc: denied { map } for pid=3131 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-5,10.128.15.240' (ECDSA) to the list of known hosts. executing program [ 23.702907] audit: type=1400 audit(1513175854.544:7): avc: denied { map } for pid=3145 comm="syzkaller415822" path="/root/syzkaller415822994" 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 [ 23.730780] kasan: CONFIG_KASAN_INLINE enabled [ 23.735402] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.742799] general protection fault: 0000 [#1] SMP KASAN [ 23.748308] Dumping ftrace buffer: [ 23.751812] (ftrace buffer empty) [ 23.755487] Modules linked in: [ 23.758647] CPU: 1 PID: 3145 Comm: syzkaller415822 Not tainted 4.15.0-rc3+ #219 [ 23.766059] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.775393] RIP: 0010:page_mapping+0xa4/0x530 [ 23.779854] RSP: 0018:ffff8801c4e77320 EFLAGS: 00010202 [ 23.785182] RAX: 0000000000000004 RBX: 1ffff100389cee65 RCX: ffffffff8194fd2d [ 23.792419] RDX: 0000000000000000 RSI: 1ffff100389cef03 RDI: 0000000000000000 [ 23.799656] RBP: ffff8801c4e77470 R08: ffffed003899304c R09: ffff8801c4c98240 [ 23.806892] R10: ffff8801c4d24e48 R11: ffffed003899304b R12: 0000000000000000 [ 23.814128] R13: ffff8801c4e77448 R14: dffffc0000000000 R15: 0000000000000020 [ 23.821366] FS: 000000000103f880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 23.829556] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.835402] CR2: 0000000020c07000 CR3: 00000001c5d13000 CR4: 00000000001406e0 [ 23.842643] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.849879] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.857112] Call Trace: [ 23.859670] ? kstrndup+0xd0/0xd0 [ 23.863092] ? lock_downgrade+0x980/0x980 [ 23.867211] ? trace_hardirqs_off+0xd/0x10 [ 23.871410] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 23.876478] set_page_dirty+0xb9/0x5d0 [ 23.880331] ? __writepage+0xc0/0xc0 [ 23.884026] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.889012] ? trace_hardirqs_on+0xd/0x10 [ 23.893129] ? __rds_conn_create+0x37f/0x17e0 [ 23.897597] ? rds_conn_message_info_send+0x30/0x30 [ 23.902583] rds_atomic_free_op+0xc2/0x330 [ 23.906782] ? rds_rdma_free_op+0x500/0x500 [ 23.911072] ? refcount_sub_and_test+0x115/0x1b0 [ 23.915793] ? refcount_inc+0x50/0x50 [ 23.919565] rds_message_put+0x53c/0x6b0 [ 23.923598] ? kfree+0x1e7/0x250 [ 23.926932] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 23.932869] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 23.937068] ? trace_hardirqs_on+0xd/0x10 [ 23.941181] ? _raw_spin_unlock_bh+0x30/0x40 [ 23.945559] ? __release_sock+0x360/0x360 [ 23.949671] ? lock_sock_nested+0x91/0x110 [ 23.953872] ? rds_conn_create_outgoing+0x3f/0x50 [ 23.958691] rds_sendmsg+0x14ee/0x1f90 [ 23.962557] ? rds_send_drop_to+0x19d0/0x19d0 [ 23.967027] ? sock_has_perm+0x29c/0x400 [ 23.971054] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 23.976382] ? lock_release+0xda0/0xda0 [ 23.980330] ? selinux_socket_sendmsg+0x36/0x40 [ 23.984965] ? security_socket_sendmsg+0x89/0xb0 [ 23.989694] ? rds_send_drop_to+0x19d0/0x19d0 [ 23.994156] sock_sendmsg+0xca/0x110 [ 23.997838] ___sys_sendmsg+0x75b/0x8a0 [ 24.001779] ? copy_msghdr_from_user+0x590/0x590 [ 24.006500] ? lock_downgrade+0x980/0x980 [ 24.010621] ? __fget_light+0x29d/0x390 [ 24.014560] ? fget_raw+0x20/0x20 [ 24.017980] ? __handle_mm_fault+0x3e20/0x3e20 [ 24.022541] ? vmacache_find+0x5f/0x280 [ 24.026487] ? up_read+0x1a/0x40 [ 24.029822] ? __do_page_fault+0x3d6/0xc90 [ 24.034025] ? __fdget+0x18/0x20 [ 24.037361] __sys_sendmsg+0xe5/0x210 [ 24.041129] ? __sys_sendmsg+0xe5/0x210 [ 24.045069] ? SyS_shutdown+0x290/0x290 [ 24.049011] ? __do_page_fault+0xc90/0xc90 [ 24.053221] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.058205] SyS_sendmsg+0x2d/0x50 [ 24.061715] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.066435] RIP: 0033:0x440079 [ 24.069590] RSP: 002b:00007ffc629396f8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 24.077263] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440079 [ 24.084498] RDX: 0000000000000040 RSI: 000000002048cfe4 RDI: 0000000000000003 [ 24.091733] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 24.098968] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004019e0 [ 24.106203] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 24.113445] 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 [ 24.132510] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c4e77320 [ 24.138531] ---[ end trace 1bb29b1cfaafe110 ]--- [ 24.143488] Kernel panic - not syncing: Fatal exception [ 24.148871] Dumping ftrace buffer: [ 24.152379] (ftrace buffer empty) [ 24.156058] Kernel Offset: disabled [ 24.159653] Rebooting in 86400 seconds..