vhci_hcd: invalid port number 129 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ================================================================== BUG: KASAN: use-after-free in vhci_hub_control+0x1b6d/0x1be0 drivers/usb/usbip/vhci_hcd.c:441 Read of size 4 at addr ffff8801ce0b59dc by task syz-executor2/7716 CPU: 0 PID: 7716 Comm: syz-executor2 Not tainted 4.19.0-rc7+ #283 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 *** Guest State *** print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432 vhci_hub_control+0x1b6d/0x1be0 drivers/usb/usbip/vhci_hcd.c:441 rh_call_control drivers/usb/core/hcd.c:679 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:838 [inline] usb_hcd_submit_urb+0x17bb/0x20a0 drivers/usb/core/hcd.c:1651 CR0: actual=0x000000008005003f, shadow=0x000000008005001f, gh_mask=fffffffffffffff7 usb_submit_urb+0x893/0x14e0 drivers/usb/core/urb.c:570 usb_start_wait_urb+0x13d/0x370 drivers/usb/core/message.c:57 CR4: actual=0x0000000000002068, shadow=0x0000000000000028, gh_mask=ffffffffffffe871 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x332/0x4e0 drivers/usb/core/message.c:152 proc_control+0x99b/0xef0 drivers/usb/core/devio.c:1106 CR3 = 0x0000000000000000 usbdev_do_ioctl+0x1eb8/0x3b50 drivers/usb/core/devio.c:2412 RSP = 0x0000000000000000 RIP = 0x000000000000fff0 RFLAGS=0x00000002 DR7 = 0x0000000000000400 usbdev_ioctl+0x25/0x30 drivers/usb/core/devio.c:2569 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3a014d7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000100 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3a014d86d4 R13: 00000000004bf6ac R14: 00000000004cf598 R15: 00000000ffffffff SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0xfffffffffffffffc Allocated by task 5376: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000004 alloc_skb include/linux/skbuff.h:995 [inline] __tcp_send_ack.part.42+0x67/0x5d0 net/ipv4/tcp_output.c:3584 __tcp_send_ack net/ipv4/tcp_output.c:3611 [inline] tcp_send_ack+0x85/0xa0 net/ipv4/tcp_output.c:3611 tcp_cleanup_rbuf+0x411/0x750 net/ipv4/tcp.c:1585 tcp_recvmsg+0xaf8/0x3450 net/ipv4/tcp.c:2150 inet_recvmsg+0x181/0x6d0 net/ipv4/af_inet.c:830 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:801 sock_read_iter+0x39b/0x570 net/socket.c:878 call_read_iter include/linux/fs.h:1802 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x6ac/0x9b0 fs/read_write.c:418 vfs_read+0x17f/0x3c0 fs/read_write.c:452 FS: sel=0x0000, attr=0x10000, limit=0xfffffffc, base=0x0000000000000000 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5376: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3813 GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 skb_free_head+0x99/0xc0 net/core/skbuff.c:550 skb_release_data+0x6a4/0x880 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb net/core/skbuff.c:641 [inline] consume_skb+0x1ae/0x570 net/core/skbuff.c:701 __dev_kfree_skb_any+0xa7/0xd0 net/core/dev.c:2780 dev_consume_skb_any include/linux/netdevice.h:3523 [inline] free_old_xmit_skbs+0xc1/0x200 drivers/net/virtio_net.c:1340 start_xmit+0x1ba/0x18c0 drivers/net/virtio_net.c:1511 __netdev_start_xmit include/linux/netdevice.h:4297 [inline] netdev_start_xmit include/linux/netdevice.h:4306 [inline] xmit_one net/core/dev.c:3238 [inline] dev_hard_start_xmit+0x27f/0xc70 net/core/dev.c:3254 sch_direct_xmit+0x48b/0x1150 net/sched/sch_generic.c:327 qdisc_restart net/sched/sch_generic.c:390 [inline] __qdisc_run+0x636/0x19c0 net/sched/sch_generic.c:398 GDTR: limit=0x00000000, base=0x0000000000000000 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:3433 [inline] __dev_queue_xmit+0x1932/0x3980 net/core/dev.c:3792 dev_queue_xmit+0x17/0x20 net/core/dev.c:3857 neigh_hh_output include/net/neighbour.h:473 [inline] neigh_output include/net/neighbour.h:481 [inline] ip_finish_output2+0x105f/0x1860 net/ipv4/ip_output.c:229 ip_finish_output+0x7fd/0xf60 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x21d/0x8d0 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out+0xc5/0x1b0 net/ipv4/ip_output.c:124 __ip_queue_xmit+0x9af/0x1f30 net/ipv4/ip_output.c:505 ip_queue_xmit+0x56/0x70 include/net/ip.h:197 __tcp_transmit_skb+0x1cbc/0x3fc0 net/ipv4/tcp_output.c:1159 __tcp_send_ack.part.42+0x3ee/0x5d0 net/ipv4/tcp_output.c:3605 __tcp_send_ack net/ipv4/tcp_output.c:3611 [inline] tcp_send_ack+0x85/0xa0 net/ipv4/tcp_output.c:3611 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 tcp_cleanup_rbuf+0x411/0x750 net/ipv4/tcp.c:1585 tcp_recvmsg+0xaf8/0x3450 net/ipv4/tcp.c:2150 inet_recvmsg+0x181/0x6d0 net/ipv4/af_inet.c:830 sock_recvmsg_nosec net/socket.c:794 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:801 sock_read_iter+0x39b/0x570 net/socket.c:878 call_read_iter include/linux/fs.h:1802 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x6ac/0x9b0 fs/read_write.c:418 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe IDTR: limit=0x00000000, base=0x0000000000000000 The buggy address belongs to the object at ffff8801ce0b5680 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 860 bytes inside of 1024-byte region [ffff8801ce0b5680, ffff8801ce0b5a80) The buggy address belongs to the page: page:ffffea0007382d00 count:1 mapcount:0 mapping:ffff8801da800ac0 index:0xffff8801ce0b4900 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea00073bcb88 ffffea0007354308 ffff8801da800ac0 raw: ffff8801ce0b4900 ffff8801ce0b4000 0000000100000002 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ce0b5880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801ce0b5900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801ce0b5980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801ce0b5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801ce0b5a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================