os: fix BigReq ignoring when another request is pending

Not sure how it came to this situation, but the following commit is partly contained in our version of the code. Some lines had not been removed, tough... commit c80c41767eb101e9dbd8393d8cca7764b4e248a4 Author: Aaron Plattner <aplattner@nvidia.com> Date: Mon Oct 25 22:01:32 2010 -0700 os: Fix BigReq ignoring when another request is pending Commit cf88363db0ebb42df7cc286b85d30d7898aea840 fixed the handling of BigReq requests that are way too large and handles the case where the read() syscall returns a short read. However, it neglected to handle the case where it returns a long read, which happens when the client has another request in the queue after the bogus large one. Handle the long read case by subtracting the smaller of 'needed' and 'gotnow' from oci->ignoreBytes. If needed < gotnow, simply subtract the two, leaving gotnow equal to the number of extra bytes read. Since the code immediately following the (oci->ignoreBytes > 0) block tries to handle the next request, advance oci->bufptr immediately instead of setting oci->lenLastReq and letting the next call to ReadRequestFromClient do it. Fixes the XTS pChangeKeyboardMapping-3 test. CASES TESTS PASS UNSUP UNTST NOTIU WARN FIP FAIL UNRES UNIN ABORT -Xproto 122 389 367 2 19 0 0 0 1 0 0 0 +Xproto 122 389 368 2 19 0 0 0 0 0 0 0 Signed-off-by: Aaron Plattner <aplattner@nvidia.com> Reviewed-by: Adam Jackson <ajax@redhat.com> Signed-off-by: Keith Packard <keithp@keithp.com>

os: fix BigReq ignoring when another request is pending
a736122f · Ulrich Sibiller · Mike Gabriel · 49adb1e5 · a736122f
Commit a736122f authored May 27, 2019 by Ulrich Sibiller Committed by Mike Gabriel Jun 11, 2019
Hide whitespace changes
Inline Side-by-side

Showing with 0 additions and 2 deletions

io.c nx-X11/programs/Xserver/os/io.c +0 -2

No files found.
--- a/nx-X11/programs/Xserver/os/io.c
+++ b/nx-X11/programs/Xserver/os/io.c
@@ -424,8 +424,6 @@ ReadRequestFromClient(ClientPtr client)

    if (oci->ignoreBytes > 0) {
 	assert(needed == oci->ignoreBytes || needed == oci->size);
-	oci->ignoreBytes -= gotnow;
-	needed = gotnow = 0;
 	/*
 	 * The _XSERVTransRead call above may return more or fewer bytes than we
 	 * want to ignore.  Ignore the smaller of the two sizes.