Intel driver is unable to map large textures. which generates GL_OUT_OF_MEMORY error and a segfault/assertion failure later on. This issue is closely related to Bug:44970.

Piglit test case error log:

GL_TEXTURE_2D, Maximum allowable texture size = 8192
Mesa: User error: GL_OUT_OF_MEMORY in glTexSubImage2D
GL error 1 while testing GL_TEXTURE_2D, texture size = 4097, internal format = GL_RGBA8
intel-miptree-release: intel_regions.c:310: intel_region_release: Assertion `region->map_refcount == 0' failed.

Program received signal SIGABRT, Aborted.
0x00110416 in __kernel_vsyscall ()
(gdb) bt
#0  0x00110416 in __kernel_vsyscall ()
#1  0x4dc3698f in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0x4dc382d5 in __GI_abort () at abort.c:91
#3  0x4dc2f6a5 in __assert_fail_base (fmt=0x4dd6fc48 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x29a949 "region->map_refcount == 0", 
    file=0x29a85f "intel_regions.c", line=310, function=0x29a9b1 "intel_region_release") at assert.c:94
#4  0x4dc2f757 in __GI___assert_fail (assertion=0x29a949 "region->map_refcount == 0", file=0x29a85f "intel_regions.c", line=310, 
    function=0x29a9b1 "intel_region_release") at assert.c:103
#5  0x001f4b52 in intel_region_release (region_handle=0x83203bc) at intel_regions.c:310
#6  0x001f1def in intel_miptree_release (mt=0x8328d2c) at intel_mipmap_tree.c:299
#7  0x001f1cab in intel_miptree_reference (dst=0x8328d2c, src=0x831f1f8) at intel_mipmap_tree.c:276
#8  0x001fa117 in intel_alloc_texture_image_buffer (ctx=0x80c8aa0, image=0x831d3b8, format=MESA_FORMAT_ARGB8888, width=4098, height=4098, depth=1) at intel_tex.c:104
#9  0x003f9815 in _mesa_store_teximage3d (ctx=0x80c8aa0, texImage=0x831d3b8, internalFormat=32856, width=4098, height=4098, depth=1, border=0, format=6408, 
    type=5126, pixels=0x0, packing=0x80ce530) at main/texstore.c:4280
#10 0x001fb3ac in intelTexImage (ctx=0x80c8aa0, dims=2, texImage=0x831d3b8, internalFormat=32856, width=4098, height=4098, depth=1, format=6408, type=5126, 
    pixels=0x0, unpack=0x80ce530, imageSize=0) at intel_tex_image.c:227
#11 0x001fb479 in intelTexImage2D (ctx=0x80c8aa0, texImage=0x831d3b8, internalFormat=32856, width=4098, height=4098, border=0, format=6408, type=5126, pixels=0x0, 
    unpack=0x80ce530) at intel_tex_image.c:256
#12 0x003e16ec in teximage (ctx=0x80c8aa0, dims=2, target=3553, level=0, internalFormat=32856, width=4098, height=4098, depth=1, border=0, format=6408, type=5126, 
    pixels=0x0) at main/teximage.c:2535
#13 0x003e193c in _mesa_TexImage2D (target=3553, level=0, internalFormat=32856, width=4098, height=4098, border=0, format=6408, type=5126, pixels=0x0)
    at main/teximage.c:2587
#14 0x0806bedb in piglit_display () at /home/anuj/projects/piglit/tests/bugs/intel-miptree-release.c:109
#15 0x0806c6d7 in display () at /home/anuj/projects/piglit/tests/util/piglit-framework.c:56
#16 0x4d13a3c3 in ?? () from /usr/lib/libglut.so.3
#17 0x4d13ddc7 in fgEnumWindows () from /usr/lib/libglut.so.3
#18 0x4d13a86e in glutMainLoopEvent () from /usr/lib/libglut.so.3
#19 0x4d13b0b8 in glutMainLoop () from /usr/lib/libglut.so.3
#20 0x0806ce59 in main (argc=1, argv=0xbffff1d4) at /home/anuj/projects/piglit/tests/util/piglit-framework.c:304