[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 26.938938] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.960144] random: sshd: uninitialized urandom read (32 bytes read) [ 31.208518] random: sshd: uninitialized urandom read (32 bytes read) [ 31.819106] random: sshd: uninitialized urandom read (32 bytes read) [ 39.304801] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 45.038456] random: sshd: uninitialized urandom read (32 bytes read) [ 45.160062] IPVS: ftp: loaded support on port[0] = 21 [ 45.323419] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.330346] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.337871] device bridge_slave_0 entered promiscuous mode [ 45.356477] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.362921] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.370227] device bridge_slave_1 entered promiscuous mode [ 45.388875] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 45.406764] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 45.457965] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 45.479330] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 45.557318] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 45.564913] team0: Port device team_slave_0 added [ 45.582734] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 45.590221] team0: Port device team_slave_1 added [ 45.607888] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 45.629241] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 45.649246] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 45.670798] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported [ 45.779364] ip (5467) used greatest stack depth: 16360 bytes left RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 45.827040] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.833491] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.840628] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.847055] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 46.358449] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.408319] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 46.458975] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 46.465554] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 46.472743] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 46.524426] 8021q: adding VLAN 0 to HW filter on device team0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.279918] ------------[ cut here ]------------ [ 54.284795] kernel BUG at net/ipv4/ip_output.c:776! [ 54.289865] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 54.295230] CPU: 1 PID: 5927 Comm: syz-executor878 Not tainted 4.19.0-rc2+ #53 [ 54.302585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.311935] RIP: 0010:ip_do_fragment+0x246d/0x2ae0 [ 54.316868] Code: 8b 8d 70 fe ff ff e9 3a e8 ff ff 4c 89 ef e8 ca bc 3d fb e9 1c e9 ff ff 4c 89 f7 e8 bd bc 3d fb e9 94 e5 ff ff e8 23 59 fa fa <0f> 0b 4c 89 e7 e8 a9 bc 3d fb e9 58 e8 ff ff 4c 89 f7 89 8d 70 fe [ 54.335756] RSP: 0018:ffff8801d3c467d0 EFLAGS: 00010293 [ 54.341120] RAX: ffff8801b97d6480 RBX: ffff8801cc7e0b80 RCX: ffffffff86845f5e [ 54.348378] RDX: 0000000000000000 RSI: ffffffff8684760d RDI: 0000000000000005 [ 54.355639] RBP: ffff8801d3c469a8 R08: ffff8801b97d6480 R09: ffffed0039619e40 [ 54.362901] R10: ffffed0039619e42 R11: ffff8801cb0cf213 R12: ffff8801cc7e0c44 [ 54.370196] R13: 00000000fffffff2 R14: ffff8801cc7e0c50 R15: dffffc0000000000 [ 54.377454] FS: 0000000002050880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 54.385665] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.391531] CR2: 00000000006cc090 CR3: 00000001bdeb3000 CR4: 00000000001406e0 [ 54.398804] Call Trace: [ 54.401384] ? ip_copy_metadata+0xe10/0xe10 [ 54.405702] ? ip_finish_output2+0x18d0/0x18d0 [ 54.410281] ? graph_lock+0x170/0x170 [ 54.414087] ? nf_conntrack_update+0xb90/0xb90 [ 54.418655] ? xfrm_lookup_with_ifid+0x880/0x2b80 [ 54.423498] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.429041] ? ipv4_mtu+0x37d/0x590 [ 54.432654] ? __build_flow_key.constprop.52+0x5f0/0x5f0 [ 54.438092] ? find_held_lock+0x36/0x1c0 [ 54.442138] ip_fragment.constprop.49+0x179/0x240 [ 54.446966] ip_finish_output+0x6b4/0xf60 [ 54.451113] ? ip_fragment.constprop.49+0x240/0x240 [ 54.456118] ? kasan_check_read+0x11/0x20 [ 54.460254] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 54.465530] ? rcu_bh_qs+0xc0/0xc0 [ 54.469079] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 54.474208] ? nf_hook_slow+0x11e/0x1c0 [ 54.478171] ip_output+0x21d/0x8d0 [ 54.481701] ? ip_mc_output+0x15b0/0x15b0 [ 54.485832] ? ip_fragment.constprop.49+0x240/0x240 [ 54.490834] ? __ip_select_ident+0x16d/0x2a0 [ 54.495225] ? ip_idents_reserve+0x320/0x320 [ 54.499629] ip_local_out+0xc5/0x1b0 [ 54.503345] iptunnel_xmit+0x56a/0x8d0 [ 54.507219] ip_tunnel_xmit+0x1586/0x3ac3 [ 54.511355] ? ip_md_tunnel_xmit+0x16b0/0x16b0 [ 54.515922] ? __sanitizer_cov_trace_const_cmp1+0x6/0x20 [ 54.521359] ? kasan_check_write+0x14/0x20 [ 54.525587] ? pskb_expand_head+0x6b3/0x10f0 [ 54.529979] ? __lock_acquire+0x7ec/0x4ec0 [ 54.534197] ? mark_held_locks+0x130/0x130 [ 54.538416] ? mark_held_locks+0x130/0x130 [ 54.542639] ? __pskb_copy_fclone+0xeb0/0xeb0 [ 54.547120] ? mark_held_locks+0x130/0x130 [ 54.551343] ? mark_held_locks+0x130/0x130 [ 54.555567] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.561091] __gre_xmit+0x5e1/0x980 [ 54.564704] ipgre_xmit+0x3e7/0xba0 [ 54.568316] ? gre_tap_xmit+0x590/0x590 [ 54.572284] ? __lock_is_held+0xb5/0x140 [ 54.576338] dev_hard_start_xmit+0x27f/0xc70 [ 54.580735] ? dev_direct_xmit+0x6b0/0x6b0 [ 54.584962] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.590484] ? netif_skb_features+0x690/0xb70 [ 54.594979] ? validate_xmit_xfrm+0x1ef/0xda0 [ 54.599470] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.605001] ? validate_xmit_skb+0x80c/0xf30 [ 54.609396] ? netif_skb_features+0xb70/0xb70 [ 54.613879] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.619402] ? check_preemption_disabled+0x48/0x200 [ 54.624406] ? check_preemption_disabled+0x48/0x200 [ 54.629412] __dev_queue_xmit+0x2f3b/0x3980 [ 54.633754] ? save_stack+0x43/0xd0 [ 54.637369] ? kasan_kmalloc+0xc7/0xe0 [ 54.641242] ? __kmalloc_node_track_caller+0x47/0x70 [ 54.646344] ? netdev_pick_tx+0x2d0/0x2d0 [ 54.650475] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 54.655563] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 54.660655] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.666179] ? check_preemption_disabled+0x48/0x200 [ 54.671184] ? check_preemption_disabled+0x48/0x200 [ 54.676391] ? __lock_is_held+0xb5/0x140 [ 54.680443] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 54.685448] ? skb_release_data+0x1c4/0x880 [ 54.689763] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 54.695035] ? kasan_unpoison_shadow+0x35/0x50 [ 54.699607] ? skb_tx_error+0x2f0/0x2f0 [ 54.703587] ? __kmalloc_node_track_caller+0x47/0x70 [ 54.708702] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.714227] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 54.719754] ? kasan_check_write+0x14/0x20 [ 54.723984] ? pskb_expand_head+0x6b3/0x10f0 [ 54.728471] ? __pskb_copy_fclone+0xeb0/0xeb0 [ 54.732950] ? skb_checksum+0x140/0x140 [ 54.736918] ? __lock_is_held+0xb5/0x140 [ 54.740975] ? kasan_check_write+0x14/0x20 [ 54.745193] ? __skb_clone+0x6c7/0xa00 [ 54.749067] ? __copy_skb_header+0x6b0/0x6b0 [ 54.753480] ? kmem_cache_alloc+0x33a/0x730 [ 54.757793] ? skb_ensure_writable+0x15e/0x640 [ 54.762367] dev_queue_xmit+0x17/0x20 [ 54.766157] ? dev_queue_xmit+0x17/0x20 [ 54.770117] __bpf_redirect+0x5cf/0xb20 [ 54.774077] bpf_clone_redirect+0x2f6/0x490 [ 54.778384] bpf_prog_bebbfe2050753572+0xdaa/0x1000 [ 54.783381] ? genl_register_family+0x130/0x1510 [ 54.788121] ? lock_downgrade+0x900/0x900 [ 54.792254] ? ktime_get+0x352/0x440 [ 54.795980] ? pvclock_read_flags+0x160/0x160 [ 54.800458] ? bpf_test_run+0xf7/0x5a0 [ 54.804329] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 54.809766] ? lock_acquire+0x1ed/0x520 [ 54.813734] ? bpf_test_run+0x32e/0x5a0 [ 54.817710] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.823237] ? check_preemption_disabled+0x48/0x200 [ 54.828247] ? kasan_check_read+0x11/0x20 [ 54.832400] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 54.837666] ? rcu_bh_qs+0xc0/0xc0 [ 54.841191] ? __build_skb+0x359/0x430 [ 54.845066] ? skb_try_coalesce+0x1b70/0x1b70 [ 54.849551] ? bpf_test_run+0x1c0/0x5a0 [ 54.853516] ? eth_type_trans+0x2ea/0x760 [ 54.857660] ? netlink_diag_dump+0x2a0/0x2a0 [ 54.862053] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.867575] ? bpf_test_init.isra.9+0x70/0x100 [ 54.872141] ? bpf_prog_test_run_skb+0x634/0xb40 [ 54.876885] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 54.881740] ? bpf_prog_add+0x69/0xd0 [ 54.885532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.891073] ? __bpf_prog_get+0x9b/0x290 [ 54.895133] ? bpf_test_finish.isra.8+0x1f0/0x1f0 [ 54.899960] ? bpf_prog_test_run+0x130/0x1a0 [ 54.904377] ? __x64_sys_bpf+0x3d8/0x510 [ 54.908520] ? bpf_prog_get+0x20/0x20 [ 54.912314] ? do_syscall_64+0x1b9/0x820 [ 54.916414] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 54.921769] ? syscall_return_slowpath+0x5e0/0x5e0 [ 54.926687] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.931527] ? trace_hardirqs_off+0x300/0x300 [ 54.936009] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 54.941010] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.946529] ? prepare_exit_to_usermode+0x291/0x3b0 [ 54.951532] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.956383] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.961730] Modules linked in: [ 54.964980] ---[ end trace 620a30b63728f4ef ]--- [ 54.969742] RIP: 0010:ip_do_fragment+0x246d/0x2ae0 [ 54.974695] Code: 8b 8d 70 fe ff ff e9 3a e8 ff ff 4c 89 ef e8 ca bc 3d fb e9 1c e9 ff ff 4c 89 f7 e8 bd bc 3d fb e9 94 e5 ff ff e8 23 59 fa fa <0f> 0b 4c 89 e7 e8 a9 bc 3d fb e9 58 e8 ff ff 4c 89 f7 89 8d 70 fe [ 54.993634] RSP: 0018:ffff8801d3c467d0 EFLAGS: 00010293 [ 54.998986] RAX: ffff8801b97d6480 RBX: ffff8801cc7e0b80 RCX: ffffffff86845f5e [ 55.006279] RDX: 0000000000000000 RSI: ffffffff8684760d RDI: 0000000000000005 [ 55.013578] RBP: ffff8801d3c469a8 R08: ffff8801b97d6480 R09: ffffed0039619e40 [ 55.020846] R10: ffffed0039619e42 R11: ffff8801cb0cf213 R12: ffff8801cc7e0c44 [ 55.028153] R13: 00000000fffffff2 R14: ffff8801cc7e0c50 R15: dffffc0000000000 [ 55.035447] FS: 0000000002050880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 55.043690] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.049564] CR2: 00000000006cc090 CR3: 00000001bdeb3000 CR4: 00000000001406e0 [ 55.057088] Kernel panic - not syncing: Fatal exception in interrupt [ 55.064403] Kernel Offset: disabled [ 55.068025] Rebooting in 86400 seconds..