[haiku-bugs] Re: [Haiku] #10469: [Gravity] crashes in BBitmap::_AssertPointer()
- From: "pulkomandy" <trac@xxxxxxxxxxxx>
- Date: Tue, 19 Aug 2014 11:48:39 -0000
#10469: [Gravity] crashes in BBitmap::_AssertPointer()
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Reporter: diver | Owner: kallisti5
Type: bug | Status: new
Priority: normal | Milestone: R1/alpha5
Component: Kits/OpenGL Kit | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by pulkomandy):
I tried to debug mesa_legacy, and I found that there is an integer
overflow. The fWidth and fHeight used when allocating the bitmap are
unsigned ints, so an attempt to set them to -1 leads to an overflow. This
prevents the already existing "<1" checks from working. Since we also
don't check wether the bitmap allocation and InitCheck succeded, we hit a
BBitmap assert when accessing the non existing bits.
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Ticket URL: <https://dev.haiku-os.org/ticket/10469#comment:4>
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