Fix kvm bitmap index
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Authored by luporl on Sep 6 2019, 5:43 PM.

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alfredo

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will
emaste

Summary

_kvm_bitmap_next may perform an out-of-bounds access on bm->map array.
It seems the right is to divide *idx by CHAR_BIT, instead of multiplying it.

Another thing that looks strange to me is the function returning when it finds a bit that is not set. Shouldn't it be the opposite?

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Buildable 26319
Build 24798: arc lint + arc unit

Event Timeline

luporl created this revision.Sep 6 2019, 5:43 PM

Harbormaster completed remote builds in B26319: Diff 61745.Sep 6 2019, 5:43 PM

luporl added a reviewer: emaste.Dec 9 2019, 3:57 PM

luporl abandoned this revision.Jul 28 2021, 5:37 PM

emaste mentioned this in D19183: libkvm: Fix the kvm_walk_pages in amd64.Jul 28 2021, 6:31 PM

There's more that needs to be fixed here but you can go ahead and commit this change

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lib/

libkvm/

kvm_private.c

2 lines

Diff 61745

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Fix kvm bitmap indexAbandonedPublicActions