[Bug 91577] [HD Graphics 4000] Crash

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91577

--- Comment #8 from Dominic <fdo-bugs.aspseka at xoxy.net> ---
More info:

First crash
__kgem_ring_is_idle+0x24 is in src/sna/kgem.c:3132
gen7_render_fill+0x234 is in src/sna/kgem.h:359
sna_poly_fill_rect_blt+0x442 is in src/sna/sna_accel.c:465

Second crash:
kgem_retire__requests_ring+0x1a is in src/sna/kgem.c:3061
kgem_retire__requests+0x1e is in src/sna/kgem.c:3095
kgem_retire+0x50 is in src/sna/kgem.c:3111
__kgem_throttle_retire+0x3f is in src/sna/kgem.c:549
search_linear_cache+0x26b is in src/sna/kgem.c:4438
kgem_create_buffer+0x5fa is in src/sna/kgem.c:7396
sna_write_boxes+0x13c6 is in src/sna/sna_io.c:1174
sna_copy_boxes+0x14dc is in src/sna/sna_accel.c:6857
sna_do_copy+0x7c8 is in src/sna/sna_accel.c:7176
sna_copy_area+0x1e2 is in src/sna/sna_accel.c:7267


So both segfault addresses are in calls to
 __kgem_busy(kgem, rq->bo->handle)

Unfortunately, I cannot catch it in gdb to see whether rq->bo or rq->bo->handle
fails.

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