bugGNU GRUB - Bugs: bug #42134, loadenv.c – check_blocklists –...


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bug #42134: loadenv.c – check_blocklists – algorithm for block overlap check is wrong

Submitted by:  Роман Пехов <roman_pekhov>
Submitted on:  Thu 17 Apr 2014 02:17:55 PM UTC  
Votes:  101  
Category: ConfigurationSeverity: Major
Priority: 5 - NormalItem Group: Software Error
Status: FixedPrivacy: Public
Assigned to: NoneOriginator Name: 
Open/Closed: ClosedRelease: 
Release: Git masterReproducibility: Every Time
Planned Release: None

Sun 22 Jun 2014 01:37:50 AM UTC, comment #1:

Committed, thanks.

Vladimir Serbinenko <phcoder>
Project Administrator
Thu 17 Apr 2014 02:17:55 PM UTC, original submission:

The check_blocklists function surely writes "malformed file" error if the block list contains more than one blocks.

The well-known overlap check algorithm is:

if (s1 < e2 && s2 < e1)
return grub_error (GRUB_ERR_BAD_FS, "malformed file");

Swap (s1 <-> s2, e1 <-> e2) is not needed in this case.

Роман Пехов <roman_pekhov>


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Carbon-Copy List
  • -unavailable- added by phcoder (Posted a comment)
  • -unavailable- added by sharifm (Voted in favor of this item)
  • -unavailable- added by roman_pekhov (Voted in favor of this item)
  • -unavailable- added by roman_pekhov (Submitted the item)

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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 22 Jun 2014 01:37:50 AM UTCphcoderStatusNone=>Fixed
    Sun 18 May 2014 02:03:31 AM UTCsharifmCarbon-Copy-=>Added sharifm
    Sat 19 Apr 2014 10:20:45 PM UTCroman_pekhovCarbon-Copy-=>Added roman_pekhov

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