R8188EU: segfault at 3 ip 000076165819d7fd sp 00007fffd96deb08 error 4 in libc.so.6

[sardChen]

When executing fuzzing test for and reload rtl8188eu, I found a segfault bug in dmesg logs:

[ 6972.208332] usb 1-11.3: new high-speed USB device number 12 using xhci_hcd
[ 6972.287706] usb 1-11.3: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
[ 6972.287730] usb 1-11.3: New USB device strings: Mfr=2, Product=3, SerialNumber=4
[ 6972.287741] usb 1-11.3: Product: Wireless_Device
[ 6972.287749] usb 1-11.3: Manufacturer: MediaTek Inc.
[ 6972.287755] usb 1-11.3: SerialNumber: 000000000
[ 6972.365698] usb 1-11.3: reset high-speed USB device number 12 using xhci_hcd
[ 6974.412625] R8188EU wlx90de80d68af7: renamed from wlan0
[ 6976.579069] wlx90de80d68af7: authenticate with 10:7c:61:da:ff:f9
[ 6977.112499] wlx90de80d68af7: send auth to 10:7c:61:da:ff:f9 (try 1/3)
[ 6977.117766] wlx90de80d68af7: authenticated
[ 6977.118971] wlx90de80d68af7: associate with 10:7c:61:da:ff:f9 (try 1/3)
[ 6977.130168] wlx90de80d68af7: RX AssocResp from 10:7c:61:da:ff:f9 (capab=0x1501 status=0 aid=1)
[ 6977.165685] wlx90de80d68af7: associated
[ 7131.076247] wlx90de80d68af7: deauthenticating from 10:7c:61:da:ff:f9 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 7131.871662] R8188EU wlx90de80d68af7: entered promiscuous mode
[ 7132.448242] R8188EU wlx90de80d68af7: entered allmulticast mode
[ 7149.972924] wlx90de80d68af7: authenticate with 10:7c:61:da:ff:f9
[ 7150.001298] wlx90de80d68af7: send auth to 10:7c:61:da:ff:f9 (try 1/3)
[ 7150.005811] wlx90de80d68af7: authenticated
[ 7150.007014] wlx90de80d68af7: associate with 10:7c:61:da:ff:f9 (try 1/3)
[ 7150.018103] wlx90de80d68af7: RX AssocResp from 10:7c:61:da:ff:f9 (capab=0x1501 status=0 aid=1)
[ 7150.052620] wlx90de80d68af7: associated
[ 7190.874279] wlx90de80d68af7: deauthenticating from 10:7c:61:da:ff:f9 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 7210.328130] wlx90de80d68af7: authenticate with 10:7c:61:da:ff:f9
[ 7210.355020] wlx90de80d68af7: send auth to 10:7c:61:da:ff:f9 (try 1/3)
[ 7210.359564] wlx90de80d68af7: authenticated
[ 7210.360815] wlx90de80d68af7: associate with 10:7c:61:da:ff:f9 (try 1/3)
[ 7210.370106] wlx90de80d68af7: RX AssocResp from 10:7c:61:da:ff:f9 (capab=0x1501 status=0 aid=1)
[ 7210.405239] wlx90de80d68af7: associated
[ 7252.906738] show_signal_msg: 4 callbacks suppressed
[ 7252.906742] R8188EU: segfault at 3 ip 000076165819d7fd sp 00007fffd96deb08 error 4 in libc.so.6[761658028000+195000] likely on CPU 8 (core 4, socket 0)
[ 7252.906761] Code: f8 77 c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 89 f8 48 89 fa c5 f9 ef c0 25 ff 0f 00 00 3d e0 0f 00 00 0f 87 33 01 00 00 <c5> fd 74 0f c5 fd d7 c1 85 c0 74 57 f3 0f bc c0 c5 f8 77 c3 66 66