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Ricardo Salveti <ricardo.salveti@linaro.org> found one place where the
randr code could use the randr screen private data without checking
for null first. This happens when the X server is running with
multiple screens, some of which are randr enabled and some of which
are not. Applications making protocol requests to the non-randr
screens can cause segfaults where the server touches the unset private
structure.
I audited the code and found two more possible problem spots; the
trick to auditing for this issue was to look for functions not taking
a RandR data structure and where there was no null screen private
check above them in the call graph.
Signed-off-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit
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|---|---|---|
| .. | ||
| Makefile.am | ||
| randr.c | ||
| randrstr.h | ||
| rrcrtc.c | ||
| rrdispatch.c | ||
| rrinfo.c | ||
| rrmode.c | ||
| rroutput.c | ||
| rrpointer.c | ||
| rrproperty.c | ||
| rrscreen.c | ||
| rrsdispatch.c | ||
| rrtransform.c | ||
| rrtransform.h | ||
| rrxinerama.c | ||