wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan_ext()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan_ext() Replace one-element array with a flexible-array member in `struct host_cmd_ds_802_11_scan_ext`. With this, fix the following warning: elo 16 17:51:58 surfacebook kernel: ------------[ cut here ]------------ elo 16 17:51:58 surfacebook kernel: memcpy: detected field-spanning write (size 243) of single field "ext_scan->tlv_buffer" at drivers/net/wireless/marvell/mwifiex/scan.c:2239 (size 1) elo 16 17:51:58 surfacebook kernel: WARNING: CPU: 0 PID: 498 at drivers/net/wireless/marvell/mwifiex/scan.c:2239 mwifiex_cmd_802_11_scan_ext+0x83/0x90 [mwifiex]

References

• https://git.kernel.org/stable/c/b55c8848fdc81514ec047b2a0ec782ffe9ab5323
• https://git.kernel.org/stable/c/f9310a6704bf52e2493480edea896e1f9b795d40
• https://git.kernel.org/stable/c/1756918f51e9ab247a0f4782cc28853c2bb457c1
• https://git.kernel.org/stable/c/e59bdb1ba594104cd0ee0af3ee9e4435d842a8fe
• https://git.kernel.org/stable/c/17199b69a84798efffc475040fbef44374ef1de1
• https://git.kernel.org/stable/c/fef7b51f22cf2049b0ca6740adeb0ba6f2e671dc
• https://git.kernel.org/stable/c/71267bd4e8c752d7af6c6b96bb83984a6a95273d
• https://git.kernel.org/stable/c/a3a12c30f9510f3753286fadbc6cdb7dad78c1d5
• https://git.kernel.org/stable/c/498365e52bebcbc36a93279fe7e9d6aec8479cee