On Wed, Dec 13, 2023 at 09:06:43AM -0800, Jeff Johnson wrote: > Currently struct wmi_tdls_peer_capabilities defines: > struct wmi_channel peer_chan_list[1]; > > Per the guidance in [1] this should be a flexible array, and at one > point Gustavo was trying to fix this [2], but had questions about the > correct behavior when the associated peer_chan_len is 0. > > I have been unable to determine if firmware requires that at least one > record be present even if peer_chan_len is 0. But since that is the > current behavior, follow the example from [3] and replace the > one-element array with a union that contains both a flexible array and > a single instance of the array element. This results in a struct that > has the same footprint as the original, so no other driver changes are > required. > > No functional changes, compile tested only. > > [1] https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays > [2] https://lore.kernel.org/linux-wireless/626ae2e7-66f8-423b-b17f-e75c1a6d29b3@xxxxxxxxxxxxxx/ > [3] https://lore.kernel.org/linux-wireless/202308301529.AC90A9EF98@keescook/ > > Signed-off-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx> Again, good to keep the struct the same size. Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> -- Kees Cook
