vhci_hcd: invalid port number 108 ================================================================== BUG: KASAN: use-after-free in vhci_hub_control+0x1b6d/0x1be0 drivers/usb/usbip/vhci_hcd.c:441 Read of size 4 at addr ffff8801cdc238bc by task syz-executor2/6343 CPU: 1 PID: 6343 Comm: syz-executor2 Not tainted 4.19.0-rc7+ #281 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 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 usb_submit_urb+0x893/0x14e0 drivers/usb/core/urb.c:570 usb_start_wait_urb+0x13d/0x370 drivers/usb/core/message.c:57 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 usbdev_do_ioctl+0x1eb8/0x3b50 drivers/usb/core/devio.c:2412 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 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 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:00007f2ab30a2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000080 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2ab30a36d4 R13: 00000000004bf6ac R14: 00000000004cf598 R15: 00000000ffffffff Allocated by task 6018: 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 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x730 mm/slab.c:3554 kmem_cache_zalloc include/linux/slab.h:697 [inline] __alloc_file+0xa8/0x470 fs/file_table.c:100 alloc_empty_file+0x72/0x170 fs/file_table.c:150 alloc_file+0x5e/0x4d0 fs/file_table.c:192 alloc_file_pseudo+0x261/0x3f0 fs/file_table.c:231 sock_alloc_file+0x4c/0x180 net/socket.c:394 sock_map_fd net/socket.c:417 [inline] __sys_socket+0x172/0x260 net/socket.c:1351 __do_sys_socket net/socket.c:1356 [inline] __se_sys_socket net/socket.c:1354 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1354 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 6024: 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] kmem_cache_free+0x83/0x290 mm/slab.c:3756 file_free_rcu+0x91/0xd0 fs/file_table.c:49 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2576 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2880 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2847 [inline] rcu_process_callbacks+0xf23/0x2670 kernel/rcu/tree.c:2864 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 The buggy address belongs to the object at ffff8801cdc237c0 which belongs to the cache filp(97:syz5) of size 456 The buggy address is located 252 bytes inside of 456-byte region [ffff8801cdc237c0, ffff8801cdc23988) The buggy address belongs to the page: page:ffffea00073708c0 count:1 mapcount:0 mapping:ffff8801c093a0c0 index:0xffff8801cdc23040 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0007326b48 ffffea0006e01708 ffff8801c093a0c0 raw: ffff8801cdc23040 ffff8801cdc23040 0000000100000002 ffff8801c224e540 page dumped because: kasan: bad access detected page->mem_cgroup:ffff8801c224e540 Memory state around the buggy address: ffff8801cdc23780: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801cdc23800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cdc23880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cdc23900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cdc23980: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================