ntdll: fix get_server_context_flags
wine at mkarcher.dialup.fu-berlin.de
Sat Jul 25 07:23:31 CDT 2009
The "mask CPU id flags" line did the opposite of what it said: It
left only the CPU id bits in, as ~0x3f is everything except the
register selection. This made all output bits set, as the CPU id
bit is set in the symbolic constants like CONTEXT_CONTROL and in
the flags passed in, so the bitwise and is never zero.
The result is a memory overwrite in the clients as
CONTEXT_EXTENDED_REGISTERS gets passed to client not expecting it.
This fixes for example the crash reported in Bug 15259, comment 10. As
that bug is a sort of catch-all basket for the rather generic
"setup_exception_record stack overflow" error message caused usually by
memory corruption, the other issues reported there probably won't be
fixed by this patch.
dlls/ntdll/thread.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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