libnvme: examples: validate AE numbers in mi-mctp-ae - #3915
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libnvme: examples: validate AE numbers in mi-mctp-ae#3915prabhakarpujeri wants to merge 1 commit into
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Port of linux-nvme/libnvme#1127. atoi() results were used unchecked to index the 256-entry aem_config.enabled_map.enabled[] array on the stack, so a value outside 0-255 (or negative) is an out-of-bounds stack write. Reject them. Lift 'argc == 4' to 'argc >= 4' so more than one AE can actually be enabled per the usage text. Signed-off-by: Prabhakar Pujeri <prabhakar.pujeri@dell.com>
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Problem
Port of linux-nvme/libnvme#1127 to libnvme3: the example in this tree has the identical argv-parsing bug as the 1.x version:
atoi()values index the 256-entryaem_config.enabled_map.enabled[]stack array unchecked (OOB stack write for out-of-range / negative inputs), andargc == 4accepts exactly one AE number although the usage text ([AE #s separated by spaces]) and the loop are written for a variable count.Fix
argc == 4toargc >= 4, matching the documented usage.Testing