CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:20002 CR4: actual=0x0000000000002040, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 vhci_hcd: invalid port number 76 ================================================================== BUG: KASAN: slab-out-of-bounds in vhci_hub_control+0x1b6d/0x1be0 drivers/usb/usbip/vhci_hcd.c:441 IPVS: set_ctl: invalid protocol: 0 0.0.0.0:20002 Read of size 4 at addr ffff8801cdea03bc by task syz-executor5/3484 CPU: 0 PID: 3484 Comm: syz-executor5 Not tainted 4.19.0-rc8+ #65 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 vhci_hcd: invalid port number 76 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 CR3 = 0x0000000000000000 vhci_hub_control+0x1b6d/0x1be0 drivers/usb/usbip/vhci_hcd.c:441 RSP = 0x0000000000000000 RIP = 0x0000000000000000 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:00007f92727a3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000000 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92727a46d4 R13: 00000000004bf6ac R14: 00000000004cf598 R15: 00000000ffffffff Allocated by task 5499: 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 getname_flags+0xd0/0x5a0 fs/namei.c:140 user_path_at_empty+0x2d/0x50 fs/namei.c:2608 do_readlinkat+0x156/0x410 fs/stat.c:394 __do_sys_readlink fs/stat.c:427 [inline] __se_sys_readlink fs/stat.c:424 [inline] __x64_sys_readlink+0x78/0xb0 fs/stat.c:424 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5499: 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 putname+0xf2/0x130 fs/namei.c:261 filename_lookup+0x39a/0x520 fs/namei.c:2357 user_path_at_empty+0x40/0x50 fs/namei.c:2608 do_readlinkat+0x156/0x410 fs/stat.c:394 __do_sys_readlink fs/stat.c:427 [inline] __se_sys_readlink fs/stat.c:424 [inline] __x64_sys_readlink+0x78/0xb0 fs/stat.c:424 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801cdea0980 which belongs to the cache names_cache of size 4096 The buggy address is located 1476 bytes to the left of 4096-byte region [ffff8801cdea0980, ffff8801cdea1980) The buggy address belongs to the page: page:ffffea000737a800 count:1 mapcount:0 mapping:ffff8801da978dc0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea0005f74f08 ffffea0006196208 ffff8801da978dc0 raw: 0000000000000000 ffff8801cdea0980 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cdea0280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cdea0300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801cdea0380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801cdea0400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cdea0480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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