[....] 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: [ 53.098205] kauditd_printk_skb: 4 callbacks suppressed [ 53.098220] audit: type=1400 audit(1546637328.051:35): avc: denied { map } for pid=8507 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 [ 53.141891] sshd (8505) used greatest stack depth: 19848 bytes left Warning: Permanently added '10.128.0.125' (ECDSA) to the list of known hosts. [ 59.961226] audit: type=1400 audit(1546637334.911:36): avc: denied { map } for pid=8519 comm="syz-execprog" path="/root/syz-execprog" 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 2019/01/04 21:28:55 parsed 1 programs [ 60.750495] audit: type=1400 audit(1546637335.701:37): avc: denied { map } for pid=8519 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=1104 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 2019/01/04 21:28:57 executed programs: 0 [ 62.484684] IPVS: ftp: loaded support on port[0] = 21 [ 62.552750] chnl_net:caif_netlink_parms(): no params data found [ 62.588148] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.594857] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.602151] device bridge_slave_0 entered promiscuous mode [ 62.609652] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.616172] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.623120] device bridge_slave_1 entered promiscuous mode [ 62.640540] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 62.650440] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 62.669664] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 62.677490] team0: Port device team_slave_0 added [ 62.683031] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 62.690408] team0: Port device team_slave_1 added [ 62.695734] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 62.702984] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 62.768364] device hsr_slave_0 entered promiscuous mode [ 62.825962] device hsr_slave_1 entered promiscuous mode [ 62.866100] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 62.873119] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 62.887714] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.894168] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.901360] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.907771] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.944504] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 62.951969] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.960680] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 62.970413] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.990349] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.998181] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.006647] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 63.017513] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 63.023585] 8021q: adding VLAN 0 to HW filter on device team0 [ 63.033387] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 63.041464] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.047870] bridge0: port 1(bridge_slave_0) entered forwarding state [ 63.057912] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 63.066329] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.072691] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.089581] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 63.098206] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 63.109341] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 63.122251] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 63.133783] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 63.145232] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 63.152832] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 63.160722] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 63.169028] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 63.180691] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 63.192661] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 63.202878] audit: type=1400 audit(1546637338.151:38): avc: denied { associate } for pid=8532 comm="syz-executor0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 63.686980] kasan: CONFIG_KASAN_INLINE enabled [ 63.691739] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 63.699222] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 63.705454] CPU: 0 PID: 8616 Comm: syz-executor0 Not tainted 4.20.0+ #9 [ 63.712192] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.721556] RIP: 0010:__smc_diag_dump.isra.0+0x32a/0x2ba0 [ 63.727096] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 26 25 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7f 20 49 8d 7f 0e 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 d2 [ 63.745996] RSP: 0018:ffff8880a0a2f120 EFLAGS: 00010203 [ 63.751360] RAX: dffffc0000000000 RBX: ffff88808b6e6ac0 RCX: 0000000000000000 [ 63.758622] RDX: 0000000000000001 RSI: ffffffff87b6b452 RDI: 000000000000000e [ 63.765884] RBP: ffff8880a0a2f3e8 R08: ffff8880978b2180 R09: ffff888093701598 [ 63.773147] R10: ffffed10126e02a8 R11: ffff888093701547 R12: ffff88808a34b260 [ 63.780410] R13: ffff888093701548 R14: ffff88808b6e6f20 R15: 0000000000000000 [ 63.787674] FS: 00007fc94514a700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 63.795904] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.801776] CR2: 0000000000000000 CR3: 0000000091cbe000 CR4: 00000000001406f0 [ 63.809055] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.816317] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.823573] Call Trace: [ 63.826157] ? __kmalloc_node_track_caller+0x4e/0x70 [ 63.831258] ? __alloc_skb+0x185/0x730 [ 63.835143] ? smc_diag_handler_dump+0x350/0x350 [ 63.839890] ? sock_sendmsg+0xdd/0x130 [ 63.843768] ? ___sys_sendmsg+0x7ec/0x910 [ 63.847911] ? __sys_sendmsg+0x112/0x270 [ 63.851962] ? __sys_sendmsg+0x230/0x270 [ 63.856066] ? do_syscall_64+0x1a3/0x800 [ 63.860160] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.865689] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.871227] ? check_preemption_disabled+0x48/0x290 [ 63.876241] ? __lock_is_held+0xb6/0x140 [ 63.880301] ? __kmalloc_node_track_caller+0x3d/0x70 [ 63.885398] ? lock_acquire+0x1db/0x570 [ 63.889377] ? smc_diag_dump_proto.isra.0+0xfb/0x3c0 [ 63.894476] ? lock_release+0xc40/0xc40 [ 63.898448] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 63.903980] ? kasan_check_write+0x14/0x20 [ 63.908217] smc_diag_dump_proto.isra.0+0x2e7/0x3c0 [ 63.913231] ? __smc_diag_dump.isra.0+0x2ba0/0x2ba0 [ 63.918259] ? find_held_lock+0x35/0x120 [ 63.922320] smc_diag_dump+0x27/0x80 [ 63.926068] netlink_dump+0x5f2/0x1070 [ 63.929958] ? netlink_broadcast+0x50/0x50 [ 63.934194] __netlink_dump_start+0x5b4/0x7e0 [ 63.938694] smc_diag_handler_dump+0x2a7/0x350 [ 63.943271] ? smc_gid_be16_convert+0x2c0/0x2c0 [ 63.947959] ? lock_downgrade+0x910/0x910 [ 63.952162] ? smc_diag_dump_proto.isra.0+0x3c0/0x3c0 [ 63.957373] ? rcu_read_unlock_special+0x380/0x380 [ 63.962303] sock_diag_rcv_msg+0x322/0x410 [ 63.966537] netlink_rcv_skb+0x17d/0x410 [ 63.970591] ? sock_diag_bind+0x80/0x80 [ 63.974562] ? netlink_ack+0xba0/0xba0 [ 63.978483] sock_diag_rcv+0x2b/0x40 [ 63.982193] netlink_unicast+0x574/0x770 [ 63.986255] ? netlink_attachskb+0x980/0x980 [ 63.990677] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.996211] netlink_sendmsg+0xa05/0xf90 [ 64.000266] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.005800] ? netlink_unicast+0x770/0x770 [ 64.010033] ? selinux_socket_sendmsg+0x36/0x40 [ 64.014694] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.020228] ? security_socket_sendmsg+0x93/0xc0 [ 64.024996] ? netlink_unicast+0x770/0x770 [ 64.029232] sock_sendmsg+0xdd/0x130 [ 64.032984] ___sys_sendmsg+0x7ec/0x910 [ 64.036954] ? copy_msghdr_from_user+0x570/0x570 [ 64.041730] ? iterate_fd+0x4b0/0x4b0 [ 64.045532] ? __might_fault+0x12b/0x1e0 [ 64.049591] ? find_held_lock+0x35/0x120 [ 64.053643] ? __might_fault+0x12b/0x1e0 [ 64.057699] ? __fget_light+0x2db/0x420 [ 64.061683] ? fget_raw+0x20/0x20 [ 64.065132] ? lock_release+0xc40/0xc40 [ 64.069108] ? trace_hardirqs_off_caller+0x300/0x300 [ 64.074211] ? __fdget+0x1b/0x20 [ 64.077572] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.083113] ? sockfd_lookup_light+0xc2/0x160 [ 64.087778] __sys_sendmsg+0x112/0x270 [ 64.091661] ? __ia32_sys_shutdown+0x80/0x80 [ 64.096070] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.101456] ? trace_hardirqs_off_caller+0x300/0x300 [ 64.106569] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 64.111321] __x64_sys_sendmsg+0x78/0xb0 [ 64.115382] do_syscall_64+0x1a3/0x800 [ 64.119268] ? syscall_return_slowpath+0x5f0/0x5f0 [ 64.124194] ? prepare_exit_to_usermode+0x232/0x3b0 [ 64.129206] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 64.134099] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.139311] RIP: 0033:0x457ec9 [ 64.142499] Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.161406] RSP: 002b:00007fc945149c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 64.169121] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 [ 64.176390] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000008 [ 64.183655] RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 [ 64.190919] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc94514a6d4 [ 64.198183] R13: 00000000004c5188 R14: 00000000004d8a10 R15: 00000000ffffffff [ 64.205450] Modules linked in: [ 64.209208] ---[ end trace 6416d41227f1a1ae ]--- [ 64.213977] RIP: 0010:__smc_diag_dump.isra.0+0x32a/0x2ba0 [ 64.219549] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 26 25 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7f 20 49 8d 7f 0e 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 d2 [ 64.238479] RSP: 0018:ffff8880a0a2f120 EFLAGS: 00010203 [ 64.243844] RAX: dffffc0000000000 RBX: ffff88808b6e6ac0 RCX: 0000000000000000 [ 64.251148] RDX: 0000000000000001 RSI: ffffffff87b6b452 RDI: 000000000000000e [ 64.258460] RBP: ffff8880a0a2f3e8 R08: ffff8880978b2180 R09: ffff888093701598 [ 64.265748] R10: ffffed10126e02a8 R11: ffff888093701547 R12: ffff88808a34b260 [ 64.273028] R13: ffff888093701548 R14: ffff88808b6e6f20 R15: 0000000000000000 [ 64.280319] FS: 00007fc94514a700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 64.288565] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.294448] CR2: 0000000000000000 CR3: 0000000091cbe000 CR4: 00000000001406f0 [ 64.301791] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.309119] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.316447] Kernel panic - not syncing: Fatal exception [ 64.322730] Kernel Offset: disabled [ 64.326358] Rebooting in 86400 seconds..