[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 31.606853] random: sshd: uninitialized urandom read (32 bytes read) [ 31.870315] kauditd_printk_skb: 10 callbacks suppressed [ 31.870324] audit: type=1400 audit(1555430612.415:35): avc: denied { map } for pid=6858 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 [ 31.912662] random: sshd: uninitialized urandom read (32 bytes read) [ 32.398716] random: sshd: uninitialized urandom read (32 bytes read) [ 57.427686] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.157' (ECDSA) to the list of known hosts. [ 63.063235] random: sshd: uninitialized urandom read (32 bytes read) [ 63.183887] audit: type=1400 audit(1555430643.725:36): avc: denied { map } for pid=6871 comm="syz-executor680" path="/root/syz-executor680280652" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 63.940225] IPVS: ftp: loaded support on port[0] = 21 [ 64.239814] chnl_net:caif_netlink_parms(): no params data found [ 64.269550] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.276658] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.283781] device bridge_slave_0 entered promiscuous mode [ 64.290649] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.296987] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.304071] device bridge_slave_1 entered promiscuous mode [ 64.318857] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 64.328289] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 64.344304] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 64.351852] team0: Port device team_slave_0 added [ 64.357248] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 64.364792] team0: Port device team_slave_1 added [ 64.370001] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 64.378443] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 64.461875] device hsr_slave_0 entered promiscuous mode [ 64.500534] device hsr_slave_1 entered promiscuous mode [ 64.540644] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 64.547691] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 64.560534] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.566936] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.573987] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.580550] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.607498] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 64.613853] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.622182] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 64.631584] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.650491] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.657918] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.668166] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 64.675028] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.683375] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.691138] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.697484] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.706649] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.714858] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.721413] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.739377] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 64.749576] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.761322] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 64.767955] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.776019] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.783589] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.791300] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.798880] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 64.805742] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.818207] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 64.828824] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.856690] hsr_addr_subst_dest: Unknown node [ 64.861526] ------------[ cut here ]------------ [ 64.866342] WARNING: CPU: 0 PID: 6872 at net/hsr/hsr_framereg.c:313 hsr_addr_subst_dest.cold+0x45/0x4f [ 64.875794] Kernel panic - not syncing: panic_on_warn set ... [ 64.875794] [ 64.883159] CPU: 0 PID: 6872 Comm: syz-executor680 Not tainted 4.14.111 #1 [ 64.890165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.899533] Call Trace: [ 64.902327] dump_stack+0x138/0x19c [ 64.905958] panic+0x1f2/0x438 [ 64.909138] ? add_taint.cold+0x16/0x16 [ 64.913114] ? hsr_addr_subst_dest.cold+0x45/0x4f [ 64.918027] ? hsr_addr_subst_dest.cold+0x45/0x4f [ 64.922952] __warn.cold+0x2f/0x34 [ 64.926497] ? ist_end_non_atomic+0x10/0x10 [ 64.930795] ? hsr_addr_subst_dest.cold+0x45/0x4f [ 64.935629] report_bug+0x216/0x254 [ 64.939235] do_error_trap+0x1bb/0x310 [ 64.943213] ? math_error+0x360/0x360 [ 64.947023] ? vprintk_emit+0x171/0x600 [ 64.950988] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 64.955917] do_invalid_op+0x1b/0x20 [ 64.959742] invalid_op+0x1b/0x40 [ 64.963291] RIP: 0010:hsr_addr_subst_dest.cold+0x45/0x4f [ 64.968840] RSP: 0018:ffff88807b6d7698 EFLAGS: 00010286 [ 64.974198] RAX: 0000000000000021 RBX: dffffc0000000000 RCX: 0000000000000000 [ 64.981457] RDX: 0000000000000000 RSI: ffffffff866d0860 RDI: ffffed100f6daec9 [ 64.988724] RBP: ffff88807b6d76d8 R08: 0000000000000021 R09: ffff888075158960 [ 64.995972] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a84d2ce0 [ 65.003238] R13: 0000000000000000 R14: ffff8880a84d2ce0 R15: 0000000000000000 [ 65.010526] ? hsr_addr_subst_dest.cold+0x45/0x4f [ 65.015355] hsr_forward_skb+0x1025/0x1940 [ 65.019578] hsr_dev_xmit+0x72/0xa0 [ 65.023202] dev_hard_start_xmit+0x191/0x8c0 [ 65.027628] ? assoc_array_gc+0x1160/0x11d0 [ 65.031955] __dev_queue_xmit+0x1da3/0x25f0 [ 65.036334] ? find_held_lock+0x35/0x130 [ 65.040443] ? netdev_pick_tx+0x300/0x300 [ 65.044606] ? iov_iter_advance+0x218/0xc60 [ 65.048944] ? memcpy+0x46/0x50 [ 65.052220] dev_queue_xmit+0x18/0x20 [ 65.056006] ? dev_queue_xmit+0x18/0x20 [ 65.060057] pppoe_sendmsg+0x5cf/0x730 [ 65.063932] ? ether_setup+0x2d0/0x2d0 [ 65.067817] ? pppoe_getname+0x140/0x140 [ 65.071936] ? selinux_socket_sendmsg+0x36/0x40 [ 65.076624] ? security_socket_sendmsg+0x8f/0xc0 [ 65.081366] ? pppoe_getname+0x140/0x140 [ 65.085424] sock_sendmsg+0xd0/0x110 [ 65.089185] ___sys_sendmsg+0x349/0x850 [ 65.093173] ? copy_msghdr_from_user+0x3f0/0x3f0 [ 65.097942] ? trace_hardirqs_on+0x10/0x10 [ 65.102178] ? save_trace+0x290/0x290 [ 65.106022] ? save_trace+0x290/0x290 [ 65.109817] ? save_trace+0x290/0x290 [ 65.113607] ? reacquire_held_locks+0xb7/0x3b0 [ 65.118196] ? release_sock+0x14c/0x1c0 [ 65.122171] ? find_held_lock+0x35/0x130 [ 65.126220] ? release_sock+0x14c/0x1c0 [ 65.130243] ? __local_bh_enable_ip+0x99/0x1a0 [ 65.134914] ? __fget_light+0x172/0x1f0 [ 65.138897] ? __fdget+0x1b/0x20 [ 65.142257] ? sockfd_lookup_light+0xb4/0x160 [ 65.146749] __sys_sendmmsg+0x152/0x3a0 [ 65.150748] ? SyS_sendmsg+0x50/0x50 [ 65.154577] ? SYSC_connect+0xe7/0x2d0 [ 65.158469] ? SYSC_bind+0x220/0x220 [ 65.162191] ? up_read+0x1a/0x40 [ 65.165643] ? __do_page_fault+0x358/0xb80 [ 65.169945] SyS_sendmmsg+0x35/0x60 [ 65.173578] ? __sys_sendmmsg+0x3a0/0x3a0 [ 65.177736] do_syscall_64+0x1eb/0x630 [ 65.181642] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 65.186620] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 65.191827] RIP: 0033:0x441929 [ 65.195068] RSP: 002b:00007ffe6d71abb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 65.202802] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441929 [ 65.210073] RDX: 0400000000000191 RSI: 000000002000d180 RDI: 0000000000000003 [ 65.217347] RBP: 00000000004a8fd0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 65.224628] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402e70 [ 65.231902] R13: 0000000000402f00 R14: 0000000000000000 R15: 0000000000000000 [ 65.240396] Kernel Offset: disabled [ 65.244096] Rebooting in 86400 seconds..