[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.970671] random: sshd: uninitialized urandom read (32 bytes read) [ 37.284177] kauditd_printk_skb: 10 callbacks suppressed [ 37.284185] audit: type=1400 audit(1578319800.828:35): avc: denied { map } for pid=7161 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 [ 37.337873] random: sshd: uninitialized urandom read (32 bytes read) [ 37.925029] random: sshd: uninitialized urandom read (32 bytes read) [ 38.102905] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.84' (ECDSA) to the list of known hosts. [ 43.705891] random: sshd: uninitialized urandom read (32 bytes read) [ 43.821443] audit: type=1400 audit(1578319807.368:36): avc: denied { map } for pid=7173 comm="syz-executor117" path="/root/syz-executor117126057" 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 [ 44.070850] IPVS: ftp: loaded support on port[0] = 21 [ 44.824262] audit: type=1400 audit(1578319808.368:37): avc: denied { create } for pid=7174 comm="syz-executor117" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 44.848819] audit: type=1400 audit(1578319808.368:38): avc: denied { write } for pid=7174 comm="syz-executor117" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 44.873353] audit: type=1400 audit(1578319808.368:39): avc: denied { read } for pid=7174 comm="syz-executor117" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 44.927334] chnl_net:caif_netlink_parms(): no params data found [ 44.959038] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.965707] bridge0: port 1(bridge_slave_0) entered disabled state [ 44.973023] device bridge_slave_0 entered promiscuous mode [ 44.979758] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.986285] bridge0: port 2(bridge_slave_1) entered disabled state [ 44.993304] device bridge_slave_1 entered promiscuous mode [ 45.007537] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 45.016571] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 45.032456] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 45.039584] team0: Port device team_slave_0 added [ 45.045390] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 45.052474] team0: Port device team_slave_1 added [ 45.057726] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 45.065151] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 45.111780] device hsr_slave_0 entered promiscuous mode [ 45.180374] device hsr_slave_1 entered promiscuous mode [ 45.220982] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 45.227958] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 45.265653] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.272154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.278929] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.285397] bridge0: port 1(bridge_slave_0) entered forwarding state [ 45.313053] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 45.319182] 8021q: adding VLAN 0 to HW filter on device bond0 [ 45.327583] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 45.336759] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.354855] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.361865] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.371186] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 45.377256] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.385726] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 45.393277] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.399605] bridge0: port 1(bridge_slave_0) entered forwarding state [ 45.408515] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 45.416475] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.422887] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.437163] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 45.444691] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 45.453840] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 45.465338] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 45.476058] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 45.486754] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 45.493083] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 45.500624] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 45.508165] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 45.518805] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 45.526324] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 45.533428] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 45.544476] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 45.597844] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 45.607560] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 45.639055] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 45.646590] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 45.653106] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 45.662557] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 45.669775] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 45.676879] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready executing program [ 45.685555] device veth0_vlan entered promiscuous mode [ 45.694285] device veth1_vlan entered promiscuous mode [ 45.700095] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 45.708100] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 45.720964] protocol 88fb is buggy, dev hsr_slave_0 [ 45.726103] protocol 88fb is buggy, dev hsr_slave_1 [ 45.760393] ================================================================== [ 45.767848] BUG: KASAN: slab-out-of-bounds in macvlan_broadcast+0x4b9/0x5c0 [ 45.776341] Read of size 4 at addr ffff88808ff88541 by task syz-executor117/7174 [ 45.783895] [ 45.785617] CPU: 1 PID: 7174 Comm: syz-executor117 Not tainted 4.14.162-syzkaller #0 [ 45.793483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.802837] Call Trace: [ 45.805414] dump_stack+0x142/0x197 [ 45.809027] ? macvlan_broadcast+0x4b9/0x5c0 [ 45.813421] print_address_description.cold+0x7c/0x1dc [ 45.818680] ? macvlan_broadcast+0x4b9/0x5c0 [ 45.823073] kasan_report.cold+0xa9/0x2af [ 45.827215] __asan_report_load_n_noabort+0xf/0x20 [ 45.832138] macvlan_broadcast+0x4b9/0x5c0 [ 45.836353] ? validate_xmit_skb+0x650/0x9d0 [ 45.840756] macvlan_start_xmit+0x56b/0x72d [ 45.845063] packet_direct_xmit+0x431/0x640 [ 45.849376] packet_sendmsg+0x1dd4/0x5a60 [ 45.853520] ? avc_has_perm_noaudit+0x420/0x420 [ 45.858192] ? trace_hardirqs_on+0x10/0x10 [ 45.862414] ? packet_notifier+0x760/0x760 [ 45.866627] ? release_sock+0x14a/0x1b0 [ 45.870587] ? security_socket_sendmsg+0x89/0xb0 [ 45.875323] ? packet_notifier+0x760/0x760 [ 45.879549] sock_sendmsg+0xce/0x110 [ 45.883244] SYSC_sendto+0x206/0x310 [ 45.886953] ? SYSC_connect+0x2d0/0x2d0 [ 45.890929] ? move_addr_to_kernel.part.0+0x100/0x100 [ 45.896103] ? ioctl_preallocate+0x1c0/0x1c0 [ 45.900516] ? security_file_ioctl+0x7d/0xb0 [ 45.904918] ? security_file_ioctl+0x89/0xb0 [ 45.909328] SyS_sendto+0x40/0x50 [ 45.912767] ? SyS_getpeername+0x30/0x30 [ 45.916810] do_syscall_64+0x1e8/0x640 [ 45.920677] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.925507] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 45.930726] RIP: 0033:0x442a99 [ 45.933896] RSP: 002b:00007fffb8a4a478 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 45.941587] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442a99 [ 45.948839] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 45.956092] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 45.963380] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 45.970629] R13: 0000000000403e20 R14: 0000000000000000 R15: 0000000000000000 [ 45.977946] [ 45.979574] Allocated by task 7164: [ 45.983236] save_stack_trace+0x16/0x20 [ 45.987193] save_stack+0x45/0xd0 [ 45.990628] kasan_kmalloc+0xce/0xf0 [ 45.994324] kasan_slab_alloc+0xf/0x20 [ 45.998242] kmem_cache_alloc+0x12e/0x780 [ 46.002373] skb_clone+0x129/0x320 [ 46.005894] packet_rcv_spkt+0x424/0x560 [ 46.009954] __netif_receive_skb_core+0x9f5/0x2cb0 [ 46.015743] __netif_receive_skb+0x2c/0x1b0 [ 46.020067] netif_receive_skb_internal+0xe4/0x5a0 [ 46.024983] napi_gro_receive+0x2f8/0x410 [ 46.029111] receive_buf+0x534/0x4770 [ 46.032891] virtnet_poll+0x515/0xa6e [ 46.036717] net_rx_action+0x490/0xf80 [ 46.040588] __do_softirq+0x244/0x9a0 [ 46.044364] [ 46.045996] Freed by task 7164: [ 46.049300] save_stack_trace+0x16/0x20 [ 46.053256] save_stack+0x45/0xd0 [ 46.056700] kasan_slab_free+0x75/0xc0 [ 46.060564] kmem_cache_free+0x83/0x2b0 [ 46.064514] kfree_skbmem+0xa5/0x110 [ 46.068202] kfree_skb+0xbd/0x350 [ 46.071633] packet_rcv_spkt+0xd9/0x560 [ 46.075597] __netif_receive_skb_core+0x9f5/0x2cb0 [ 46.080504] __netif_receive_skb+0x2c/0x1b0 [ 46.084815] netif_receive_skb_internal+0xe4/0x5a0 [ 46.089721] napi_gro_receive+0x2f8/0x410 [ 46.093847] receive_buf+0x534/0x4770 [ 46.097635] virtnet_poll+0x515/0xa6e [ 46.101424] net_rx_action+0x490/0xf80 [ 46.105302] __do_softirq+0x244/0x9a0 [ 46.109078] [ 46.110690] The buggy address belongs to the object at ffff88808ff88440 [ 46.110690] which belongs to the cache skbuff_head_cache of size 232 [ 46.123849] The buggy address is located 25 bytes to the right of [ 46.123849] 232-byte region [ffff88808ff88440, ffff88808ff88528) [ 46.136134] The buggy address belongs to the page: [ 46.141045] page:ffffea00023fe200 count:1 mapcount:0 mapping:ffff88808ff88080 index:0x0 [ 46.149170] flags: 0xfffe0000000100(slab) [ 46.153355] raw: 00fffe0000000100 ffff88808ff88080 0000000000000000 000000010000000c [ 46.161416] raw: ffffea0002787fe0 ffffea000246a360 ffff8880a9e19900 0000000000000000 [ 46.169276] page dumped because: kasan: bad access detected [ 46.174965] [ 46.176583] Memory state around the buggy address: [ 46.181492] ffff88808ff88400: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 46.188831] ffff88808ff88480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.196170] >ffff88808ff88500: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 46.203551] ^ [ 46.208979] ffff88808ff88580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.216330] ffff88808ff88600: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.223752] ================================================================== [ 46.231089] Disabling lock debugging due to kernel taint [ 46.236570] Kernel panic - not syncing: panic_on_warn set ... [ 46.236570] [ 46.240123] protocol 88fb is buggy, dev hsr_slave_0 [ 46.243927] CPU: 1 PID: 7174 Comm: syz-executor117 Tainted: G B 4.14.162-syzkaller #0 [ 46.248981] protocol 88fb is buggy, dev hsr_slave_1 [ 46.258029] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.258033] Call Trace: [ 46.258049] dump_stack+0x142/0x197 [ 46.258058] ? macvlan_broadcast+0x4b9/0x5c0 [ 46.258065] panic+0x1f9/0x42d [ 46.258070] ? add_taint.cold+0x16/0x16 [ 46.258083] kasan_end_report+0x47/0x4f [ 46.265555] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 46.272430] kasan_report.cold+0x130/0x2af [ 46.272439] __asan_report_load_n_noabort+0xf/0x20 [ 46.272450] macvlan_broadcast+0x4b9/0x5c0 [ 46.275431] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 46.278648] ? validate_xmit_skb+0x650/0x9d0 [ 46.283549] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 46.286240] macvlan_start_xmit+0x56b/0x72d [ 46.336088] packet_direct_xmit+0x431/0x640 [ 46.343254] packet_sendmsg+0x1dd4/0x5a60 [ 46.347421] ? avc_has_perm_noaudit+0x420/0x420 [ 46.352074] ? trace_hardirqs_on+0x10/0x10 [ 46.356297] ? packet_notifier+0x760/0x760 [ 46.360529] ? release_sock+0x14a/0x1b0 [ 46.364495] ? security_socket_sendmsg+0x89/0xb0 [ 46.369241] ? packet_notifier+0x760/0x760 [ 46.373451] sock_sendmsg+0xce/0x110 [ 46.377142] SYSC_sendto+0x206/0x310 [ 46.380832] ? SYSC_connect+0x2d0/0x2d0 [ 46.384789] ? move_addr_to_kernel.part.0+0x100/0x100 [ 46.389968] ? ioctl_preallocate+0x1c0/0x1c0 [ 46.394356] ? security_file_ioctl+0x7d/0xb0 [ 46.398741] ? security_file_ioctl+0x89/0xb0 [ 46.403140] SyS_sendto+0x40/0x50 [ 46.406581] ? SyS_getpeername+0x30/0x30 [ 46.410632] do_syscall_64+0x1e8/0x640 [ 46.414493] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.419315] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 46.424491] RIP: 0033:0x442a99 [ 46.427660] RSP: 002b:00007fffb8a4a478 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 46.435371] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442a99 [ 46.442627] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 46.449883] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 46.457140] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 46.464391] R13: 0000000000403e20 R14: 0000000000000000 R15: 0000000000000000 [ 46.472980] Kernel Offset: disabled [ 46.476605] Rebooting in 86400 seconds..