forked to background, child pid 3048 no interfaces have a carrier [ 63.624711][ T3049] 8021q: adding VLAN 0 to HW filter on device bond0 [ 63.657204][ T3049] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.97' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.376385][ T3478] ===================================================== [ 87.383432][ T3478] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 [ 87.390855][ T3478] _copy_to_iter+0x6ef/0x25a0 [ 87.395550][ T3478] simple_copy_to_iter+0xf3/0x140 [ 87.400590][ T3478] __skb_datagram_iter+0x2d5/0x11b0 [ 87.405811][ T3478] skb_copy_datagram_iter+0xdc/0x270 [ 87.411108][ T3478] netlink_recvmsg+0x669/0x1c80 [ 87.415974][ T3478] __sys_recvfrom+0x795/0xa10 [ 87.420675][ T3478] __x64_sys_recvfrom+0x19d/0x210 [ 87.425720][ T3478] do_syscall_64+0x54/0xd0 [ 87.430162][ T3478] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 87.436085][ T3478] [ 87.438407][ T3478] Uninit was created at: [ 87.442691][ T3478] __kmalloc_node_track_caller+0xe0c/0x1510 [ 87.448634][ T3478] __alloc_skb+0x545/0xf90 [ 87.453071][ T3478] netlink_dump+0x3e5/0x16c0 [ 87.457675][ T3478] __netlink_dump_start+0xcf8/0xe90 [ 87.462894][ T3478] inet_diag_handler_cmd+0x2e7/0x400 [ 87.468240][ T3478] sock_diag_rcv_msg+0x24a/0x620 [ 87.473201][ T3478] netlink_rcv_skb+0x40c/0x7e0 [ 87.477999][ T3478] sock_diag_rcv+0x63/0x80 [ 87.482443][ T3478] netlink_unicast+0x1093/0x1360 [ 87.487414][ T3478] netlink_sendmsg+0x14d9/0x1720 [ 87.492368][ T3478] sock_write_iter+0x594/0x690 [ 87.497161][ T3478] do_iter_readv_writev+0xa7f/0xc70 [ 87.502372][ T3478] do_iter_write+0x52c/0x1500 [ 87.507076][ T3478] do_writev+0x645/0xe00 [ 87.511335][ T3478] __x64_sys_writev+0xe5/0x120 [ 87.516148][ T3478] do_syscall_64+0x54/0xd0 [ 87.520595][ T3478] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 87.526516][ T3478] [ 87.528852][ T3478] Bytes 68-71 of 2508 are uninitialized [ 87.534426][ T3478] Memory access of size 2508 starts at ffff888114f9b000 [ 87.541379][ T3478] Data copied to user address 00007f7fe09ff2e0 [ 87.547537][ T3478] [ 87.550128][ T3478] CPU: 1 PID: 3478 Comm: syz-executor306 Not tainted 5.17.0-rc4-syzkaller #0 [ 87.558944][ T3478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.569036][ T3478] ===================================================== [ 87.575984][ T3478] Disabling lock debugging due to kernel taint [ 87.582639][ T3478] Kernel panic - not syncing: kmsan.panic set ... [ 87.589081][ T3478] CPU: 1 PID: 3478 Comm: syz-executor306 Tainted: G B 5.17.0-rc4-syzkaller #0 [ 87.599303][ T3478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.610079][ T3478] Call Trace: [ 87.613380][ T3478] [ 87.616332][ T3478] dump_stack_lvl+0x1ff/0x28e [ 87.621056][ T3478] dump_stack+0x25/0x28 [ 87.625250][ T3478] panic+0x487/0xe1f [ 87.629200][ T3478] ? add_taint+0x181/0x210 [ 87.633637][ T3478] ? _raw_spin_unlock_irqrestore+0x78/0xb0 [ 87.639494][ T3478] kmsan_report+0x2e6/0x2f0 [ 87.644037][ T3478] ? kmsan_internal_check_memory+0x1ab/0x540 [ 87.650079][ T3478] ? kmsan_copy_to_user+0xe1/0xf0 [ 87.655140][ T3478] ? _copy_to_iter+0x6ef/0x25a0 [ 87.660802][ T3478] ? simple_copy_to_iter+0xf3/0x140 [ 87.666021][ T3478] ? __skb_datagram_iter+0x2d5/0x11b0 [ 87.671416][ T3478] ? skb_copy_datagram_iter+0xdc/0x270 [ 87.676925][ T3478] ? netlink_recvmsg+0x669/0x1c80 [ 87.681973][ T3478] ? __sys_recvfrom+0x795/0xa10 [ 87.686867][ T3478] ? __x64_sys_recvfrom+0x19d/0x210 [ 87.692115][ T3478] ? do_syscall_64+0x54/0xd0 [ 87.696737][ T3478] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 87.702839][ T3478] ? _raw_spin_unlock_irqrestore+0x78/0xb0 [ 87.708677][ T3478] ? kmsan_get_metadata+0x33/0x220 [ 87.713827][ T3478] ? kmsan_internal_set_shadow_origin+0x5e/0xc0 [ 87.720104][ T3478] ? kmsan_internal_poison_memory+0x82/0xa0 [ 87.726031][ T3478] ? kmsan_internal_poison_memory+0x45/0xa0 [ 87.731977][ T3478] ? kmsan_slab_free+0xd5/0x140 [ 87.737107][ T3478] ? slab_free_freelist_hook+0x27b/0x8e0 [ 87.742774][ T3478] ? kmem_cache_free+0x2df/0x980 [ 87.747822][ T3478] ? __kfree_skb+0x298/0x330 [ 87.752437][ T3478] ? consume_skb+0xd1/0x340 [ 87.756963][ T3478] ? netlink_unicast+0x10a6/0x1360 [ 87.762098][ T3478] ? netlink_sendmsg+0x14d9/0x1720 [ 87.767236][ T3478] ? __sys_sendto+0x9ef/0xc70 [ 87.771936][ T3478] ? __x64_sys_sendto+0x19c/0x210 [ 87.776987][ T3478] ? do_syscall_64+0x54/0xd0 [ 87.781609][ T3478] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 87.787708][ T3478] ? kmsan_get_metadata+0x33/0x220 [ 87.792859][ T3478] ? kmsan_internal_set_shadow_origin+0x5e/0xc0 [ 87.799137][ T3478] ? kmsan_get_metadata+0x33/0x220 [ 87.804292][ T3478] ? kmsan_get_shadow_origin_ptr+0x9b/0xf0 [ 87.810961][ T3478] kmsan_internal_check_memory+0x1ab/0x540 [ 87.816818][ T3478] kmsan_copy_to_user+0xe1/0xf0 [ 87.821712][ T3478] ? should_fail_usercopy+0x39/0x40 [ 87.826930][ T3478] _copy_to_iter+0x6ef/0x25a0 [ 87.831652][ T3478] simple_copy_to_iter+0xf3/0x140 [ 87.836705][ T3478] __skb_datagram_iter+0x2d5/0x11b0 [ 87.841928][ T3478] ? sock_load_diag_module+0x470/0x470 [ 87.847419][ T3478] ? skb_copy_datagram_iter+0x270/0x270 [ 87.853004][ T3478] skb_copy_datagram_iter+0xdc/0x270 [ 87.858321][ T3478] netlink_recvmsg+0x669/0x1c80 [ 87.863215][ T3478] ? kmsan_get_shadow_origin_ptr+0x9b/0xf0 [ 87.869286][ T3478] ? netlink_sendmsg+0x1720/0x1720 [ 87.874433][ T3478] ? netlink_sendmsg+0x1720/0x1720 [ 87.879591][ T3478] __sys_recvfrom+0x795/0xa10 [ 87.884316][ T3478] ? kmsan_get_shadow_origin_ptr+0x9b/0xf0 [ 87.890310][ T3478] ? kmsan_get_metadata+0x33/0x220 [ 87.895470][ T3478] ? kmsan_get_shadow_origin_ptr+0x9b/0xf0 [ 87.901348][ T3478] __x64_sys_recvfrom+0x19d/0x210 [ 87.906550][ T3478] do_syscall_64+0x54/0xd0 [ 87.911013][ T3478] ? exc_page_fault+0x76/0x150 [ 87.915827][ T3478] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 87.921765][ T3478] RIP: 0033:0x7f7fe0a30c54 [ 87.926199][ T3478] Code: 89 4c 24 1c e8 5d fc ff ff 44 8b 54 24 1c 8b 3c 24 45 31 c9 89 c5 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 04 24 e8 89 fc ff ff 48 8b 04 [ 87.945855][ T3478] RSP: 002b:00007f7fe09ff240 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 87.954296][ T3478] RAX: ffffffffffffffda RBX: 00007f7fe09ff2f4 RCX: 00007f7fe0a30c54 [ 87.962332][ T3478] RDX: 0000000000001000 RSI: 00007f7fe09ff2e0 RDI: 0000000000000003 [ 87.970321][ T3478] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 87.978307][ T3478] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7fe09ff2e0 [ 87.986293][ T3478] R13: 00007f7fe0ac5074 R14: 0000917bc9395800 R15: 0000000000022000 [ 87.994318][ T3478] [ 87.997532][ T3478] Kernel Offset: disabled [ 88.001864][ T3478] Rebooting in 86400 seconds..