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853410a873
ProcDRI2Dispatch uses LocalClient to determine if it's safe to respond
to a client that has made DRI2 requests which aren't sensible for
remote clients (anything but version). When the client has disappeared
mid-request stream (e.g. as a result of a kill -9, or a client-side
bug), LocalClient causes the X server to follow suit, as
((OsCommPtr)client->osPrivate)->trans_conn is NULL at this point.
The simple and obvious fix is to just return "not local" when
trans_conn is NULL, which fixes the crash I was seeing; however Keith
Packard pointed out that just checking trans_conn isn't enough;
quoting Keith:
"This looks almost right to me -- I reviewed the os code to see when
_XSERVTransClose is called (which is what frees the trans_conn data) and
found that every place which called that immediately set trans_conn to
NULL, except for the call in CloseDownFileDescriptor which is only
called from CloseDownConnection and which is immediately followed by
freeing the OsCommRec and setting client->osPrivate to NULL. So, I'd
suggest checking client->osPrivate in addition to the above check."
Signed-off-by: Simon Farnsworth <simon.farnsworth@onelan.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit
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| .. | ||
| .gitignore | ||
| access.c | ||
| auth.c | ||
| backtrace.c | ||
| connection.c | ||
| io.c | ||
| log.c | ||
| Makefile.am | ||
| mitauth.c | ||
| oscolor.c | ||
| osdep.h | ||
| osinit.c | ||
| rpcauth.c | ||
| strcasecmp.c | ||
| strcasestr.c | ||
| strlcat.c | ||
| strlcpy.c | ||
| utils.c | ||
| WaitFor.c | ||
| xdmauth.c | ||
| xdmcp.c | ||
| xprintf.c | ||
| xsha1.c | ||
| xstrans.c | ||