Julius Werner has posted comments on this change. ( https://review.coreboot.org/19679 )
Change subject: util/cbmem: mmap underflow on low addresses
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Patch Set 2: Code-Review+2
Could you please give more specific instructions on how to reproduce the issue?
You need any x86 platform where the first mmap() for offset 0x0 fails. This happens on Braswell-based Chromebooks due to broken memory tables, for example. You can also replace (v == MAP_FAILED) with (1) if you just want to see the kernel crash.
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