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This patch adds a sanity check that avoids 'size' to overflow and crash when importing an environment that contains a checksum. Example with the wrong size that causes the crash: => env import -c 0x4100000 3 v1 This assumes that v1 has already been successfully exported with 'env export -c -s 0x100 0x4100000 v1' Signed-off-by: Pedro Aguilar <pedro.aguilar@vimar.com>