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Cell-index value is obtained from Device Tree and then used to calculate the index for accessing arrays port_mfl[], mac_mfl[] and intr_mng[]. In case of broken DT due to any error cell-index can contain any value and it is possible to go beyond the array boundaries which can lead at least to memory corruption. Validate cell-index value obtained from Device Tree. Found by Linux Verification Center (linuxtesting.org) with SVACE. Reviewed-by: Sean Anderson <sean.anderson@seco.com> Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru> Link: https://patch.msgid.link/20241028065824.15452-1-amishin@t-argos.ru Signed-off-by: Jakub Kicinski <kuba@kernel.org>