[Bug 73920] crash in R600UploadToScreenCS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73920

--- Comment #1 from Andriy Gapon <avg at icyb.net.ua> ---
Got another crash, this time in R600DownloadFromScreenCS:

(gdb) bt
#0  memcpy () at /usr/src/lib/libc/amd64/string/bcopy.S:65
#1  0x0000000804edce51 in R600DownloadFromScreenCS (pSrc=<optimized out>, x=0,
y=0, w=14400, h=<optimized out>, dst=<optimized out>, dst_pitch=14400) at
r600_exa.c:1752
#2  0x0000000805b4a960 in exaGetImage (pDrawable=0x81118da40, x=0, y=0, w=3600,
h=5364, format=2, planeMask=4294967295, d=0x816a00000 "") at exa_accel.c:1290
#3  0x000000000054be04 in miSpriteGetImage (pDrawable=0x81118da40, sx=0, sy=0,
w=3600, h=5364, format=2, planemask=4294967295, pdstLine=0x816a00000 "") at
misprite.c:413
#4  0x00000000004b7c7f in compGetImage (pDrawable=0x81118da40, sx=<optimized
out>, sy=<optimized out>, w=<optimized out>, h=<optimized out>,
format=<optimized out>, planemask=4294967295, pdstLine=0x816a00000 "") at
compinit.c:148
#5  0x00000000004c71ab in ProcShmGetImage (client=client at entry=0x809ca6240) at
shm.c:679
#6  0x00000000004c7cb5 in ProcShmDispatch (client=0x809ca6240) at shm.c:1114
#7  0x0000000000433091 in Dispatch () at dispatch.c:428
#8  0x00000000004224da in main (argc=8, argv=0x7fffffffdcd8, envp=<optimized
out>) at main.c:288

Again, it has been accompanied by the following system log messages:
[TTM] Failed to expire sync object before buffer eviction
[TTM] Unable to allocate page
error: [drm:pid39902:radeon_gem_object_create] *ERROR* Failed to allocate GEM
object (78331904, 2, 4096, -12)
vm_fault: pager read error, pid 39902 (Xorg)
pid 39902 (Xorg), uid 0: exited on signal 11 (core dumped)

Also, the following stderr messages have been captured in kdm.log:
Failed to allocate :
   size      : 78329856 bytes
   alignment : 256 bytes
   domains   : 2

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