[....] Starting enhanced syslogd: rsyslogd[ 13.101379] audit: type=1400 audit(1513703419.079:5): avc: denied { syslog } for pid=2993 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: [ 19.731263] audit: type=1400 audit(1513703425.708:6): avc: denied { map } for pid=3133 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-7,10.128.15.213' (ECDSA) to the list of known hosts. executing program [ 26.038973] audit: type=1400 audit(1513703432.016:7): avc: denied { map } for pid=3147 comm="syzkaller760203" path="/root/syzkaller760203416" 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 [ 26.066787] kasan: CONFIG_KASAN_INLINE enabled [ 26.071403] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.078784] general protection fault: 0000 [#1] SMP KASAN [ 26.084309] Dumping ftrace buffer: [ 26.087817] (ftrace buffer empty) [ 26.091492] Modules linked in: [ 26.094653] CPU: 0 PID: 3147 Comm: syzkaller760203 Not tainted 4.15.0-rc2-mm1+ #39 [ 26.102321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.111647] RIP: 0010:page_mapping+0xa4/0x530 [ 26.116105] RSP: 0018:ffff8801c4ea7320 EFLAGS: 00010202 [ 26.121437] RAX: 0000000000000004 RBX: 1ffff100389d4e65 RCX: ffffffff81950c5d [ 26.128671] RDX: 0000000000000000 RSI: 1ffff100389d4f03 RDI: 0000000000000000 [ 26.135909] RBP: ffff8801c4ea7470 R08: ffffed0038a7c56c R09: ffff8801c53e2b40 [ 26.143147] R10: ffff8801cc2ffcc8 R11: ffffed0038a7c56b R12: 0000000000000000 [ 26.150398] R13: ffff8801c4ea7448 R14: dffffc0000000000 R15: 0000000000000020 [ 26.157639] FS: 000000000142f880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 26.165829] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.171675] CR2: 0000000020fc8000 CR3: 00000001c4c61005 CR4: 00000000001606f0 [ 26.178912] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.186147] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.193385] Call Trace: [ 26.195942] ? kstrndup+0xd0/0xd0 [ 26.199365] ? lock_downgrade+0x980/0x980 [ 26.203482] ? trace_hardirqs_off+0xd/0x10 [ 26.207681] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 26.212751] set_page_dirty+0xb9/0x5d0 [ 26.216610] ? __writepage+0xc0/0xc0 [ 26.220291] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.225272] ? trace_hardirqs_on+0xd/0x10 [ 26.229388] ? __rds_conn_create+0x376/0x17f0 [ 26.233862] ? rds_conn_message_info_send+0x30/0x30 [ 26.238845] rds_atomic_free_op+0xc2/0x330 [ 26.243051] ? rds_rdma_free_op+0x500/0x500 [ 26.247340] ? refcount_sub_and_test+0x115/0x1b0 [ 26.252060] ? refcount_inc+0x50/0x50 [ 26.255833] rds_message_put+0x53c/0x6b0 [ 26.259867] ? kfree+0x1e7/0x250 [ 26.263202] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 26.269145] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 26.273348] ? trace_hardirqs_on+0xd/0x10 [ 26.277466] ? _raw_spin_unlock_bh+0x30/0x40 [ 26.281931] ? __release_sock+0x360/0x360 [ 26.286046] ? lock_sock_nested+0x91/0x110 [ 26.290249] ? rds_conn_create_outgoing+0x3f/0x50 [ 26.295058] rds_sendmsg+0x14ee/0x1f90 [ 26.298917] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.303382] ? sock_has_perm+0x29c/0x400 [ 26.307416] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 26.312750] ? lock_release+0xda0/0xda0 [ 26.316697] ? selinux_socket_sendmsg+0x36/0x40 [ 26.321330] ? security_socket_sendmsg+0x89/0xb0 [ 26.326051] ? rds_send_drop_to+0x19d0/0x19d0 [ 26.330513] sock_sendmsg+0xca/0x110 [ 26.334192] ___sys_sendmsg+0x75b/0x8a0 [ 26.338132] ? copy_msghdr_from_user+0x590/0x590 [ 26.342857] ? lock_downgrade+0x980/0x980 [ 26.346983] ? fget_raw+0x20/0x20 [ 26.350402] ? __handle_mm_fault+0x3dd0/0x3dd0 [ 26.354948] ? vmacache_find+0x5f/0x280 [ 26.358891] ? up_read+0x1a/0x40 [ 26.362223] ? __do_page_fault+0x3d6/0xc90 [ 26.366422] ? __local_bh_enable_ip+0x121/0x230 [ 26.371059] ? __fdget+0x18/0x20 [ 26.374392] __sys_sendmsg+0xe5/0x210 [ 26.378155] ? __sys_sendmsg+0xe5/0x210 [ 26.382101] ? SyS_shutdown+0x290/0x290 [ 26.386039] ? __do_page_fault+0xc90/0xc90 [ 26.390246] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.395229] SyS_sendmsg+0x2d/0x50 [ 26.398737] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 26.403455] RIP: 0033:0x43fea9 [ 26.406609] RSP: 002b:00007ffd78e8eca8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 26.414282] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fea9 [ 26.421518] RDX: 0000000000000000 RSI: 0000000020002000 RDI: 0000000000000003 [ 26.428758] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 26.435996] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401810 [ 26.443232] R13: 00000000004018a0 R14: 0000000000000000 R15: 0000000000000000 [ 26.450475] 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 [ 26.469540] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c4ea7320 [ 26.475533] ---[ end trace 3f0d5f822c9aace6 ]--- [ 26.480304] Kernel panic - not syncing: Fatal exception [ 26.486190] Dumping ftrace buffer: [ 26.489694] (ftrace buffer empty) [ 26.493369] Kernel Offset: disabled [ 26.496965] Rebooting in 86400 seconds..