[haiku-bugs] Re: [Haiku] #8650: KDL launching WebPositive development version
- From: "anevilyak" <trac@xxxxxxxxxxxx>
- Date: Sat, 30 Jun 2012 19:37:17 -0000
#8650: KDL launching WebPositive development version
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Reporter: aldeck | Owner: nobody
Type: bug | Status: new
Priority: high | Milestone: R1
Component: System | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by anevilyak):
With that panic in place, I'm quite reliably getting a backtrace that
leads into the user_strlcpy() being called from _user_access(). However,
I'm not seeing what's special about that one that's causing corruption,
the userspace source address being passed in is 0xa9 with a length of
1024, and the copy in question is targetting the KPath's buffer, so that
looks ok in theory apart from the invalid user source address. The thread
in question is currently performing a recursive access()/mkdir() pair to
completely construct all children of a path, so I don't see anything
overly suspicious there, so I'm not quite sure what's so unusual here as
to cause stack corruption, unless it already goes wrong while handling the
syscall and copying the arguments down (with syscall tracing enabled I
sometimes hit the added panic() while adding the syscall pre tracing entry
copying a string from userland).
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Ticket URL: <http://dev.haiku-os.org/ticket/8650#comment:11>
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