vhci_hcd: invalid port number 76 ================================================================== BUG: KASAN: use-after-free in vhci_hub_control+0x1b6d/0x1be0 drivers/usb/usbip/vhci_hcd.c:441 vhci_hcd: invalid port number 76 Read of size 4 at addr ffff8801ce0043bc by task syz-executor4/11630 CPU: 1 PID: 11630 Comm: syz-executor4 Not tainted 4.19.0-rc8+ #64 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:00007f5b9faf6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000140 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5b9faf76d4 R13: 00000000004bf6ac R14: 00000000004cf598 R15: 00000000ffffffff Allocated by task 10743: 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 mm/slab.c:3718 [inline] __kmalloc+0x14e/0x760 mm/slab.c:3727 kmalloc include/linux/slab.h:518 [inline] mpi_alloc_limb_space+0x31/0x50 lib/mpi/mpiutil.c:64 mpi_alloc+0x1a0/0x230 lib/mpi/mpiutil.c:39 mpi_read_raw_data+0x22a/0x490 lib/mpi/mpicoder.c:57 dh_set_secret+0x2da/0x4a0 crypto/dh.c:93 crypto_kpp_set_secret include/crypto/kpp.h:291 [inline] __keyctl_dh_compute+0x9f0/0x1bf0 security/keys/dh.c:326 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:427 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10743: 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 kzfree+0x28/0x30 mm/slab_common.c:1543 mpi_free_limb_space lib/mpi/mpiutil.c:72 [inline] mpi_free+0x9c/0x150 lib/mpi/mpiutil.c:117 dh_clear_ctx+0x9c/0xe0 crypto/dh.c:30 dh_exit_tfm+0x16/0x20 crypto/dh.c:211 crypto_kpp_exit_tfm+0x57/0x70 crypto/kpp.c:63 crypto_exit_ops crypto/api.c:324 [inline] crypto_destroy_tfm+0xbb/0x300 crypto/api.c:582 crypto_free_kpp include/crypto/kpp.h:165 [inline] __keyctl_dh_compute+0x159f/0x1bf0 security/keys/dh.c:405 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:427 __do_sys_keyctl security/keys/keyctl.c:1741 [inline] __se_sys_keyctl security/keys/keyctl.c:1637 [inline] __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637 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 ffff8801ce004300 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 188 bytes inside of 192-byte region [ffff8801ce004300, ffff8801ce0043c0) The buggy address belongs to the page: page:ffffea0007380100 count:1 mapcount:0 mapping:ffff8801da800040 index:0xffff8801ce004700 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0007336e08 ffffea0007393b88 ffff8801da800040 raw: ffff8801ce004700 ffff8801ce004000 000000010000000d 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ce004280: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8801ce004300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801ce004380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8801ce004400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ce004480: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================