[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. syzkaller login: [ 72.326002][ T28] audit: type=1400 audit(1590217859.422:8): avc: denied { execmem } for pid=7159 comm="syz-executor283" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 72.359865][ T7160] IPVS: ftp: loaded support on port[0] = 21 [ 72.458194][ T7160] chnl_net:caif_netlink_parms(): no params data found [ 72.510521][ T7160] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.518866][ T7160] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.527748][ T7160] device bridge_slave_0 entered promiscuous mode [ 72.536893][ T7160] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.544667][ T7160] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.552386][ T7160] device bridge_slave_1 entered promiscuous mode [ 72.575040][ T7160] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.586520][ T7160] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.610268][ T7160] team0: Port device team_slave_0 added [ 72.618823][ T7160] team0: Port device team_slave_1 added [ 72.638001][ T7160] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.645019][ T7160] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 72.672180][ T7160] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.686301][ T7160] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.693339][ T7160] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 72.719352][ T7160] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.796317][ T7160] device hsr_slave_0 entered promiscuous mode [ 72.833284][ T7160] device hsr_slave_1 entered promiscuous mode [ 72.989627][ T7160] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.036253][ T7160] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.096003][ T7160] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.155667][ T7160] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.250017][ T7160] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.257237][ T7160] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.265140][ T7160] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.272238][ T7160] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.321292][ T7160] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.337674][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.348711][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.357456][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.365996][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.380029][ T7160] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.391496][ T3043] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.400807][ T3043] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.407937][ T3043] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.420143][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.429899][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.437053][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.454119][ T3043] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 73.462845][ T3043] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 73.485895][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 73.495355][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.504812][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 73.514741][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.524433][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 73.532638][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.542359][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 73.551215][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.561724][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.572455][ T7160] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.592535][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.600569][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.614974][ T7160] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.635635][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 73.645330][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.665816][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 73.674916][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.686951][ T7160] device veth0_vlan entered promiscuous mode [ 73.694722][ T7368] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.702384][ T7368] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.718022][ T7160] device veth1_vlan entered promiscuous mode [ 73.741719][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 73.750317][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 73.759220][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 73.768280][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 73.780071][ T7160] device veth0_macvtap entered promiscuous mode [ 73.790791][ T7160] device veth1_macvtap entered promiscuous mode [ 73.807629][ T7160] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.817301][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 73.825921][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 73.834152][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.842707][ T3185] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.857365][ T7160] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.865614][ T7368] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.876125][ T7368] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 74.297933][ T7370] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [ 74.309662][ T7370] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 74.318087][ T7370] CPU: 0 PID: 7370 Comm: syz-executor283 Not tainted 5.7.0-rc6-syzkaller #0 [ 74.326740][ T7370] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.336787][ T7370] RIP: 0010:selinux_socket_recvmsg+0x1e/0x40 [ 74.342747][ T7370] Code: e8 77 f9 1e fe 48 89 ef 5d eb b1 90 53 48 89 fb e8 67 f9 1e fe 48 8d 7b 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0f 48 8b 7b 18 be 02 00 00 00 5b e9 7d fc ff ff e8 [ 74.362345][ T7370] RSP: 0018:ffffc900019d7a58 EFLAGS: 00010206 [ 74.368391][ T7370] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000040000000 [ 74.376354][ T7370] RDX: 0000000000000003 RSI: ffffffff83543bb9 RDI: 0000000000000018 [ 74.384311][ T7370] RBP: dffffc0000000000 R08: ffff88809f45a180 R09: 0000000000000000 [ 74.392271][ T7370] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 74.400316][ T7370] R13: ffffc900019d7d78 R14: 0000000000001000 R15: 0000000040000000 [ 74.408267][ T7370] FS: 00007f5ffb311700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 74.417174][ T7370] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.423740][ T7370] CR2: 00007f5ffb2efe78 CR3: 00000000a33c1000 CR4: 00000000001406f0 [ 74.431691][ T7370] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.439637][ T7370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.447581][ T7370] Call Trace: [ 74.450861][ T7370] security_socket_recvmsg+0x78/0xc0 [ 74.456129][ T7370] sock_recvmsg+0x47/0x110 [ 74.460543][ T7370] mptcp_recvmsg+0xb3b/0xd90 [ 74.465113][ T7370] ? mptcp_accept+0x5c0/0x5c0 [ 74.469765][ T7370] ? sock_has_perm+0x1ec/0x280 [ 74.474506][ T7370] ? prepare_to_wait_exclusive+0x2c0/0x2c0 [ 74.480292][ T7370] ? __fget_files+0x32f/0x500 [ 74.484948][ T7370] inet_recvmsg+0x121/0x5d0 [ 74.489437][ T7370] ? inet_sendpage+0x140/0x140 [ 74.494179][ T7370] ? security_socket_recvmsg+0x8e/0xc0 [ 74.499623][ T7370] ? inet_sendpage+0x140/0x140 [ 74.504366][ T7370] sock_recvmsg+0xca/0x110 [ 74.508758][ T7370] __sys_recvfrom+0x1c5/0x2f0 [ 74.513414][ T7370] ? __ia32_sys_send+0x100/0x100 [ 74.518427][ T7370] ? fput_many+0x2f/0x1a0 [ 74.522730][ T7370] ? __sys_connect+0x109/0x190 [ 74.527479][ T7370] ? __x64_sys_futex+0x376/0x4f0 [ 74.532403][ T7370] ? __x64_sys_futex+0x380/0x4f0 [ 74.537324][ T7370] ? switch_fpu_return+0x1db/0x4b0 [ 74.542412][ T7370] ? fpregs_mark_activate+0x320/0x320 [ 74.547760][ T7370] __x64_sys_recvfrom+0xdd/0x1b0 [ 74.552675][ T7370] ? lockdep_hardirqs_on+0x463/0x620 [ 74.557940][ T7370] do_syscall_64+0xf6/0x7d0 [ 74.562426][ T7370] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 74.568302][ T7370] RIP: 0033:0x448ef9 [ 74.572190][ T7370] Code: e8 cc 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 74.591778][ T7370] RSP: 002b:00007f5ffb310da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 74.600214][ T7370] RAX: ffffffffffffffda RBX: 00000000006dec28 RCX: 0000000000448ef9 [ 74.608180][ T7370] RDX: 0000000000001000 RSI: 00000000200004c0 RDI: 0000000000000003 [ 74.616164][ T7370] RBP: 00000000006dec20 R08: 0000000000000000 R09: 0000000000000000 [ 74.624118][ T7370] R10: 0000000040000000 R11: 0000000000000246 R12: 00000000006dec2c [ 74.632115][ T7370] R13: 00007ffc3a001ccf R14: 00007f5ffb3119c0 R15: 00000000006dec2c [ 74.640082][ T7370] Modules linked in: [ 74.653844][ T7370] ---[ end trace 60e1f3eb5a5b83ce ]--- [ 74.659346][ T7370] RIP: 0010:selinux_socket_recvmsg+0x1e/0x40 [ 74.665419][ T7370] Code: e8 77 f9 1e fe 48 89 ef 5d eb b1 90 53 48 89 fb e8 67 f9 1e fe 48 8d 7b 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0f 48 8b 7b 18 be 02 00 00 00 5b e9 7d fc ff ff e8 [ 74.686202][ T7370] RSP: 0018:ffffc900019d7a58 EFLAGS: 00010206 [ 74.692264][ T7370] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000040000000 [ 74.700320][ T7370] RDX: 0000000000000003 RSI: ffffffff83543bb9 RDI: 0000000000000018 [ 74.708564][ T7370] RBP: dffffc0000000000 R08: ffff88809f45a180 R09: 0000000000000000 [ 74.716578][ T7370] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 74.724605][ T7370] R13: ffffc900019d7d78 R14: 0000000000001000 R15: 0000000040000000 [ 74.736474][ T7370] FS: 00007f5ffb311700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 74.745481][ T7370] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.752067][ T7370] CR2: 00007f5ffb2efe78 CR3: 00000000a33c1000 CR4: 00000000001406f0 [ 74.760904][ T7370] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.768983][ T7370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.777221][ T7370] Kernel panic - not syncing: Fatal exception [ 74.784288][ T7370] Kernel Offset: disabled [ 74.788642][ T7370] Rebooting in 86400 seconds..