[Bug 197881] [PATCH] boot1.efi UEFI system table corruption

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197881

--- Comment #4 from commit-hook at freebsd.org ---
A commit references this bug:

Author: emaste
Date: Tue Feb 24 22:11:08 UTC 2015
New revision: 279254
URL: https://svnweb.freebsd.org/changeset/base/279254

Log:
  MFC part of r273865: fix boot1.efi for block size != 512

  r273865 is part of the work for supporting 4Kn drives, but it turns out
  the underlying bug can actually cause corruption of the UEFI system
  table in any case where block size is not 512.

  Relevant portion of the original commit message:

    convert boot1.efi to corrrectly calculate the lba for what the
    media reports and convert the size based on what FreeBSD uses.
    existing code would use the 512 byte lba and convert the
    using 4K byte size.

  PR:        197881
  Reviewed by:    Chris Ruffin

Changes:
  stable/10/sys/boot/amd64/boot1.efi/boot1.c

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