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Change History

In the Linux kernel, the following vulnerability has been resolved:

wifi: wilc1000: avoid buffer overflow in WID string configuration

Fix the following copy overflow warning identified by Smatch checker.

 drivers/net/wireless/microchip/wilc1000/wlan_cfg.c:184 wilc_wlan_parse_response_frame()
        error: '__memcpy()' 'cfg->s[i]->str' copy overflow (512 vs 65537)

This patch introduces size check before accessing the memory buffer.
The checks are base on the WID type of received data from the firmware.
For WID string configuration, the size limit is determined by individual
element size in 'struct wilc_cfg_str_vals' that is maintained in 'len' field
of 'struct wilc_cfg_str'.

https://git.kernel.org/stable/c/2203ef417044b10a8563ade6a17c74183745d72e

https://git.kernel.org/stable/c/6085291a1a5865d4ad70f0e5812d524ebd5d1711

https://git.kernel.org/stable/c/ae50f8562306a7ea1cf3c9722f97ee244f974729

https://git.kernel.org/stable/c/fe9e4d0c39311d0f97b024147a0d155333f388b5