[ 12.399132] audit: type=1400 audit(1513347146.648:5): avc: denied { syslog } for pid=2988 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 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: [ 18.530734] audit: type=1400 audit(1513347152.780:6): avc: denied { map } for pid=3132 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-6,10.128.0.48' (ECDSA) to the list of known hosts. executing program [ 24.821251] audit: type=1400 audit(1513347159.071:7): avc: denied { map } for pid=3146 comm="syzkaller646572" path="/root/syzkaller646572277" 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 [ 24.849247] kasan: CONFIG_KASAN_INLINE enabled [ 24.853915] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.861281] general protection fault: 0000 [#1] SMP KASAN [ 24.866793] Dumping ftrace buffer: [ 24.870296] (ftrace buffer empty) [ 24.873970] Modules linked in: [ 24.877128] CPU: 0 PID: 3146 Comm: syzkaller646572 Not tainted 4.15.0-rc2-mm1+ #39 [ 24.884796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.894121] RIP: 0010:page_mapping+0xa4/0x530 [ 24.898578] RSP: 0018:ffff8801c4957320 EFLAGS: 00010202 [ 24.903904] RAX: 0000000000000004 RBX: 1ffff1003892ae65 RCX: ffffffff81950c5d [ 24.911139] RDX: 0000000000000000 RSI: 1ffff1003892af03 RDI: 0000000000000000 [ 24.918372] RBP: ffff8801c4957470 R08: ffffed003895c0dc R09: ffff8801c4ae06c0 [ 24.925606] R10: ffff8801c5377a48 R11: ffffed003895c0db R12: 0000000000000000 [ 24.932839] R13: ffff8801c4957448 R14: dffffc0000000000 R15: 0000000000000020 [ 24.940073] FS: 0000000000b16880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.948260] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.954105] CR2: 0000000020c07000 CR3: 00000001c52b9000 CR4: 00000000001406f0 [ 24.961343] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.968582] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.975817] Call Trace: [ 24.978372] ? kstrndup+0xd0/0xd0 [ 24.981797] ? lock_downgrade+0x980/0x980 [ 24.985913] ? trace_hardirqs_off+0xd/0x10 [ 24.990112] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 24.995184] set_page_dirty+0xb9/0x5d0 [ 24.999039] ? __writepage+0xc0/0xc0 [ 25.002718] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.007702] ? trace_hardirqs_on+0xd/0x10 [ 25.011816] ? __rds_conn_create+0x376/0x17f0 [ 25.016284] ? rds_conn_message_info_send+0x30/0x30 [ 25.021265] rds_atomic_free_op+0xc2/0x330 [ 25.025465] ? rds_rdma_free_op+0x500/0x500 [ 25.029749] ? refcount_sub_and_test+0x115/0x1b0 [ 25.034468] ? refcount_inc+0x50/0x50 [ 25.038241] rds_message_put+0x53c/0x6b0 [ 25.042266] ? kfree+0x1e7/0x250 [ 25.045601] ? rds_message_add_rdma_dest_extension+0x170/0x170 [ 25.051540] ? rds_cmsg_rdma_map+0xb0/0xb0 [ 25.055738] ? trace_hardirqs_on+0xd/0x10 [ 25.059852] ? _raw_spin_unlock_bh+0x30/0x40 [ 25.064227] ? __release_sock+0x360/0x360 [ 25.068338] ? lock_sock_nested+0x91/0x110 [ 25.072541] ? rds_conn_create_outgoing+0x3f/0x50 [ 25.077354] rds_sendmsg+0x14ee/0x1f90 [ 25.081213] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.085679] ? sock_has_perm+0x29c/0x400 [ 25.089706] ? selinux_secmark_relabel_packet+0xc0/0xc0 [ 25.095040] ? lock_release+0xda0/0xda0 [ 25.098995] ? selinux_socket_sendmsg+0x36/0x40 [ 25.103646] ? security_socket_sendmsg+0x89/0xb0 [ 25.108374] ? rds_send_drop_to+0x19d0/0x19d0 [ 25.112837] sock_sendmsg+0xca/0x110 [ 25.116517] ___sys_sendmsg+0x75b/0x8a0 [ 25.120466] ? copy_msghdr_from_user+0x590/0x590 [ 25.125191] ? lock_downgrade+0x980/0x980 [ 25.129322] ? __fget_light+0x29d/0x390 [ 25.133265] ? fget_raw+0x20/0x20 [ 25.136685] ? __handle_mm_fault+0x3dd0/0x3dd0 [ 25.141232] ? vmacache_find+0x5f/0x280 [ 25.145176] ? up_read+0x1a/0x40 [ 25.148510] ? __do_page_fault+0x3d6/0xc90 [ 25.152713] ? __fdget+0x18/0x20 [ 25.156048] __sys_sendmsg+0xe5/0x210 [ 25.159810] ? __sys_sendmsg+0xe5/0x210 [ 25.163749] ? SyS_shutdown+0x290/0x290 [ 25.167688] ? __do_page_fault+0xc90/0xc90 [ 25.171894] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.176875] SyS_sendmsg+0x2d/0x50 [ 25.180380] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.185099] RIP: 0033:0x440079 [ 25.188252] RSP: 002b:00007fff51695d48 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 25.195922] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440079 [ 25.203155] RDX: 0000000000000040 RSI: 000000002048cfe4 RDI: 0000000000000003 [ 25.210388] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 25.217624] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004019e0 [ 25.224857] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 25.232100] 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 [ 25.251169] RIP: page_mapping+0xa4/0x530 RSP: ffff8801c4957320 [ 25.257141] ---[ end trace e02b5a430924ae05 ]--- [ 25.261914] Kernel panic - not syncing: Fatal exception [ 25.267736] Dumping ftrace buffer: [ 25.271243] (ftrace buffer empty) [ 25.274921] Kernel Offset: disabled [ 25.278513] Rebooting in 86400 seconds..