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xorg/Xserver http://lists.x.org/archives/xorg-announce/2013-October/002332.html
Save a pointer to the passed in closure structure before copying it
and overwriting the *c pointer to point to our copy instead of the
original. If we hit an error, once we free(c), reset c to point to
the original structure before jumping to the cleanup code that
references *c.
Since one of the errors being checked for is whether the server was
able to malloc(c->nChars * itemSize), the client can potentially pass
a number of characters chosen to cause the malloc to fail and the
error path to be taken, resulting in the read from freed memory.
Since the memory is accessed almost immediately afterwards, and the
X server is mostly single threaded, the odds of the free memory having
invalid contents are low with most malloc implementations when not using
memory debugging features, but some allocators will definitely overwrite
the memory there, leading to a likely crash.
v2: Apply to NXdixfonts.c rather than dixfonts.c (Mike DePaulo)
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libXfont shared library and link dynamically.
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NX agent contains/ed two build trees. An old one (probably pre-3.x.y)
and a "newer" one. The "newer" code tree used to become enabled by
setting NXUpgradeAgentServer in nx-X11/config/cf/host.def to YES.
As building the NXUpgradeAgentServer has been the default for
years now, we drop all code that does not get used at build time
for NXUpgradeAgentServer == YES (i.e., the code that belongs to the
pre-3.x.y phase of NX agent).
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Summary: Imported nxagent-3.5.0-2.tar.gz
Keywords:
Imported nxagent-3.5.0-2.tar.gz
into Git repository
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Summary: Imported nxagent-3.4.0-5.tar.gz
Keywords:
Imported nxagent-3.4.0-5.tar.gz
into Git repository
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Summary: Imported nxagent-3.4.0-3.tar.gz
Keywords:
Imported nxagent-3.4.0-3.tar.gz
into Git repository
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Summary: Imported nxagent-3.4.0-16.tar.gz
Keywords:
Imported nxagent-3.4.0-16.tar.gz
into Git repository
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Summary: Imported nxagent-3.4.0-11.tar.gz
Keywords:
Imported nxagent-3.4.0-11.tar.gz
into Git repository
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Summary: Imported nxagent-3.1.0-2.tar.gz
Keywords:
Imported nxagent-3.1.0-2.tar.gz
into Git repository
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