Closed Bug 664955 Opened 13 years ago Closed 13 years ago

"ASSERTION: parser should have rejected negative length"

Categories

(Core :: CSS Parsing and Computation, defect)

Product:
Core
Component:
CSS Parsing and Computation
Platform:
x86
macOS
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED FIXED
Milestone:
mozilla7

People

(Reporter: jruderman, Assigned: arno)

References

Details

(Keywords: assertion, testcase)

Attachments

(2 files, 3 obsolete files)

testcase
163 bytes, text/html
Details
patch v2.1
6.41 KB, patch
bzbarsky
: review+
Details | Diff | Splinter Review
Attached file testcase — 
###!!! ASSERTION: FindNextLargerFontSize failed: '*aSize > parentSize', file layout/style/nsRuleNode.cpp, line 2538
(bug 427322)

###!!! ASSERTION: parser should have rejected negative length: 'widthValue.IsCalcUnit()', file layout/style/nsRuleNode.cpp, line 6283
Attached patch patch v1 (obsolete) — — Splinter Review 
This is because nsStyleUtil::FindNextLargerFontSize returns a negative value (because of PRInt32 overflow).
Maybe it can be fixed by checking that returned value is positive (and also, below or equal nscoord_MAX).
Attachment #540231 - Flags: review?(bzbarsky)
Comment on attachment 540231 [details] [diff] [review]
patch v1

Should FindNextLargerFontSize be using the saturating computation functions?
Attached patch patch v2 (obsolete) — — Splinter Review 

        Attachment #540231 -
        Attachment is obsolete: true

        Attachment #540231 -
        Flags: review?(bzbarsky)

        Attachment #543231 -
        Flags: review?(bzbarsky)

    
    

    
  
That looks identical to v1 to me.  What about my question from comment 2?

    
    

    
  

      
      
      
      

        Attached patch
          
          
        patch v2 (obsolete)
        — 
          — Splinter Review
      

    


  
Sorry, wrong file attached. I should have checked more.

        Attachment #543231 -
        Attachment is obsolete: true

        Attachment #543231 -
        Flags: review?(bzbarsky)

        Attachment #543266 -
        Flags: review?(bzbarsky)

    
    

    
  
>+      largerSize = indexFontSize + NSCoordSaturatingNonnegativeMultiply(largerIndexFontSize - indexFontSize, relativePosition);

Should that be a saturating add?

    
    

    
  

      
      
      
      

        Attached patch
          
          
        patch v2.1
        — 
          — Splinter Review
      

    


  

        Attachment #543266 -
        Attachment is obsolete: true

        Attachment #543266 -
        Flags: review?(bzbarsky)

        Attachment #543360 -
        Flags: review?(bzbarsky)

    
    

    
  
Comment on attachment 543360 [details] [diff] [review]
patch v2.1

r=me.  Thank you!

        Attachment #543360 -
        Flags: review?(bzbarsky) → review+

    
  
Keywords: checkin-needed

    
    

    
  
http://hg.mozilla.org/mozilla-central/rev/7281d9de99eb
Assignee: nobody → arno
Status: NEW → RESOLVED
Closed: 13 years ago
Flags: in-testsuite+
Keywords: checkin-needed
Resolution: --- → FIXED
Target Milestone: --- → mozilla7

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