Module: Mesa Branch: staging/19.0 Commit: cb70d28e04756bdd0abe0df3846b45efa8015b72 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=cb70d28e04756bdd0abe0df3846b45efa8015b72
Author: Hal Gentz <[email protected]> Date: Sun Mar 24 16:52:39 2019 -0600 glx: Fix synthetic error generation in __glXSendError To quote Uli Schlachter, who understands this stuff more than I do: > The function __glXSendError() in mesa's src/glx/glx_error.c invents an X11 > protocol error out of thin air. For the sequence number it uses dpy->request. > This is the sequence number of the last request that was sent. _XError() will > then update dpy->last_request_read based on the sequence number of the error > that just "came in". > > If now another something comes in with a sequence number less than > dpy->last_request_read, since sequence numbers are monotonically increasing, > widen() will incorrectly add 1<<32 to the sequence number and things might go > downhill afterwards. `__glXSendErrorForXcb` was also patched, as that's the function that `glXCreateContextAttribsARB` actually uses. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99781 Cc: [email protected] Fixes: ad503c41 'apple: Initial import of libGL for OSX from AppleSGLX svn repository' Reviewed-by: Adam Jackson <[email protected]> Reviewed-by: Ian Romanick <[email protected]> Signed-off-by: Hal Gentz <[email protected]> (cherry picked from commit e91ee763c378d03883eb88cf0eadd8aa916f7878) --- src/glx/glx_error.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/glx/glx_error.c b/src/glx/glx_error.c index 653cbeb2d2a..712ecf8213d 100644 --- a/src/glx/glx_error.c +++ b/src/glx/glx_error.c @@ -54,7 +54,7 @@ __glXSendError(Display * dpy, int_fast8_t errorCode, uint_fast32_t resourceID, error.errorCode = glx_dpy->codes->first_error + errorCode; } - error.sequenceNumber = dpy->request; + error.sequenceNumber = dpy->last_request_read; error.resourceID = resourceID; error.minorCode = minorCode; error.majorCode = glx_dpy->majorOpcode; @@ -73,7 +73,7 @@ __glXSendErrorForXcb(Display * dpy, const xcb_generic_error_t *err) error.type = X_Error; error.errorCode = err->error_code; - error.sequenceNumber = err->sequence; + error.sequenceNumber = dpy->last_request_read; error.resourceID = err->resource_id; error.minorCode = err->minor_code; error.majorCode = err->major_code; _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
