[....] Starting file context[ 33.837841] audit: type=1800 audit(1556466796.355:34): pid=6874 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 39.006615] random: sshd: uninitialized urandom read (32 bytes read) [ 39.278751] audit: type=1400 audit(1556466801.815:35): avc: denied { map } for pid=7048 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 [ 39.332834] random: sshd: uninitialized urandom read (32 bytes read) [ 39.938020] random: sshd: uninitialized urandom read (32 bytes read) [ 40.122713] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.27' (ECDSA) to the list of known hosts. [ 45.747392] random: sshd: uninitialized urandom read (32 bytes read) [ 45.863041] audit: type=1400 audit(1556466808.405:36): avc: denied { map } for pid=7060 comm="syz-executor471" path="/root/syz-executor471617240" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 46.600168] IPVS: ftp: loaded support on port[0] = 21 [ 46.913452] chnl_net:caif_netlink_parms(): no params data found [ 46.942629] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.949141] bridge0: port 1(bridge_slave_0) entered disabled state [ 46.956300] device bridge_slave_0 entered promiscuous mode [ 46.963095] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.969452] bridge0: port 2(bridge_slave_1) entered disabled state [ 46.978098] device bridge_slave_1 entered promiscuous mode [ 46.992677] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 47.001602] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 47.016793] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 47.024121] team0: Port device team_slave_0 added [ 47.029452] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 47.036822] team0: Port device team_slave_1 added [ 47.042002] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 47.049121] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 47.102126] device hsr_slave_0 entered promiscuous mode [ 47.140372] device hsr_slave_1 entered promiscuous mode [ 47.190596] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 47.208105] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 47.222322] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.228734] bridge0: port 2(bridge_slave_1) entered forwarding state [ 47.235679] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.242056] bridge0: port 1(bridge_slave_0) entered forwarding state [ 47.268757] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 47.275484] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.283525] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.291765] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 47.311397] bridge0: port 1(bridge_slave_0) entered disabled state [ 47.318443] bridge0: port 2(bridge_slave_1) entered disabled state [ 47.328078] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 47.334264] 8021q: adding VLAN 0 to HW filter on device team0 [ 47.343034] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 47.350792] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.357121] bridge0: port 1(bridge_slave_0) entered forwarding state [ 47.377042] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 47.386954] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 47.398291] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 47.405081] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 47.412840] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.419171] bridge0: port 2(bridge_slave_1) entered forwarding state [ 47.427104] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 47.435238] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 47.442898] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 47.450594] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 47.458504] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 47.465408] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 47.477694] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready executing program [ 47.488504] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 47.515786] kasan: CONFIG_KASAN_INLINE enabled [ 47.520758] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.528109] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.534317] Modules linked in: [ 47.537492] CPU: 0 PID: 7072 Comm: syz-executor471 Not tainted 4.14.114 #4 [ 47.544479] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.553810] task: ffff888091212500 task.stack: ffff888083240000 [ 47.559876] RIP: 0010:addr_resolve+0x28c/0xa80 [ 47.564459] RSP: 0018:ffff888083247828 EFLAGS: 00010202 [ 47.569818] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110122425ae [ 47.577066] RDX: 00000000000000a8 RSI: 0000000000000001 RDI: 0000000000000282 [ 47.584339] RBP: ffff888083247920 R08: ffff888091212500 R09: 0000000000000000 [ 47.591597] R10: 0000000000000000 R11: ffff888091212500 R12: 00000000ffffff9d [ 47.598879] R13: ffff8880a8273bc0 R14: ffff8880a51605e0 R15: 0000000000000540 [ 47.606129] FS: 0000000000f50880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 47.614332] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.620220] CR2: 00000000006d3090 CR3: 00000000a91f9000 CR4: 00000000001406f0 [ 47.627485] Call Trace: [ 47.630067] ? addr_resolve_neigh+0x8a0/0x8a0 [ 47.634544] ? lockdep_init_map+0x9/0x10 [ 47.638584] ? init_timer_key+0xdc/0x300 [ 47.642626] rdma_resolve_ip+0x3d9/0x660 [ 47.646666] ? cma_work_handler+0x1e0/0x1e0 [ 47.650989] rdma_resolve_addr+0x1f5/0x2520 [ 47.655310] ? __mutex_unlock_slowpath+0x71/0x800 [ 47.660134] ? rdma_bind_addr+0x1a60/0x1a60 [ 47.664435] ucma_resolve_addr+0x158/0x1f0 [ 47.668647] ? ucma_resolve_addr+0x158/0x1f0 [ 47.673035] ? ucma_get_ctx+0x130/0x130 [ 47.676990] ? lock_downgrade+0x6e0/0x6e0 [ 47.681152] ? kasan_check_write+0x14/0x20 [ 47.685380] ? _copy_from_user+0x99/0x110 [ 47.689506] ucma_write+0x234/0x310 [ 47.693110] ? ucma_get_ctx+0x130/0x130 [ 47.697076] ? ucma_open+0x290/0x290 [ 47.700773] __vfs_write+0x107/0x6c0 [ 47.704463] ? ucma_open+0x290/0x290 [ 47.708153] ? kernel_read+0x120/0x120 [ 47.712025] ? __inode_security_revalidate+0xd6/0x130 [ 47.717202] ? avc_policy_seqno+0x9/0x20 [ 47.721278] ? selinux_file_permission+0x85/0x480 [ 47.726101] ? security_file_permission+0x8f/0x1f0 [ 47.731012] ? rw_verify_area+0xea/0x2b0 [ 47.735050] vfs_write+0x198/0x500 [ 47.738571] SyS_write+0xb8/0x180 [ 47.742001] ? SyS_read+0x180/0x180 [ 47.745628] ? do_syscall_64+0x53/0x630 [ 47.749582] ? SyS_read+0x180/0x180 [ 47.753218] do_syscall_64+0x1eb/0x630 [ 47.757171] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.761994] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 47.767162] RIP: 0033:0x442379 [ 47.770331] RSP: 002b:00007ffc9fb46d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 47.778018] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442379 [ 47.785265] RDX: 0000000000000013 RSI: 0000000020000140 RDI: 0000000000000003 [ 47.792516] RBP: 00000000004a95b0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 47.799776] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 0000000000403280 [ 47.807024] R13: 0000000000403310 R14: 0000000000000000 R15: 0000000000000000 [ 47.814290] Code: e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f4 06 00 00 45 89 6e 64 e8 e5 fe ee fc 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 c3 06 00 00 48 8b 83 40 05 00 00 65 ff 08 e8 [ 47.833386] RIP: addr_resolve+0x28c/0xa80 RSP: ffff888083247828 [ 47.840910] ---[ end trace 6016cf5d7107d473 ]--- [ 47.845671] Kernel panic - not syncing: Fatal exception [ 47.851997] Kernel Offset: disabled [ 47.855614] Rebooting in 86400 seconds..