tags 619306 + confirmed
quit
Hi,
Alexandre Duret-Lutz wrote:
> Running gs on the attached file ends with a segfault.
>
> % gs -dSAFER arch-SPOT.eps
I can't reproduce this with upstream gs (I'm probably using the wrong
build-time parameters) but I can easily reproduce it with the ghostscript
Debian package. Backtrace:
Program received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x00007ffff7fc4206 in cmsEvalLUT (Lut=0x887920, In=<value optimized out>,
Out=0x7fffffffc970)
at cmslut.c:512
#2 0x00007ffff7fcb741 in NormalXFORM (p=0x887770, in=<value optimized out>,
out=<value optimized out>, Size=1)
at cmsxform.c:210
#3 0x00007ffff7fbab71 in _cmsComputePrelinearizationTablesFromXFORM
(h=0x7fffffffcb10, nTransforms=1,
Grid=0x8895c0) at cmsgmt.c:1121
#4 0x00007ffff7fce217 in _cmsPrecalculateDeviceLink (h=0x887770,
dwFlags=<value optimized out>)
at cmssamp.c:271
#5 0x00007ffff7fcc8bd in cmsCreateProofingTransform (InputProfile=<value
optimized out>, InputFormat=196618,
OutputProfile=0x580660, OutputFormat=262170, ProofingProfile=<value
optimized out>, nIntent=1,
ProofingIntent=3, dwFlags=9216) at cmsxform.c:1537
#6 0x00007ffff7fccfbb in cmsCreateTransform (Input=<value optimized out>,
InputFormat=<value optimized out>,
Output=<value optimized out>, OutputFormat=<value optimized out>,
Intent=<value optimized out>,
dwFlags=<value optimized out>) at cmsxform.c:1618
#7 0x00007ffff75eb3d7 in gsicc_get_link_profile (pis=<value optimized out>,
dev=<value optimized out>,
gs_input_profile=0x885bf0, gs_output_profile=0x5b1c10,
rendering_params=0x7fffffffccf0, memory=0x4028c8,
include_softproof=0) at ./base/gsicc_cache.c:592
#8 0x00007ffff75e82f7 in gx_remap_ICC (pcc=0x6d1b00, pcs=0x445ba8,
pdc=0x770db0, pis=0x428d58, dev=0x4903b8,
select=gs_color_select_texture) at ./base/gsicc.c:347
#9 0x00007ffff7529b8a in gx_remap_CIEA (pc=0x6d1b00, pcs=0x445af8,
pdc=0x770db0, pis=0x428d58, dev=0x4903b8,
select=gs_color_select_texture) at ./base/gsciemap.c:665
#10 0x00007ffff77862bc in gx_remap_color (pgs=0x428d58) at ./base/gxcmap.c:553
#11 0x00007ffff7778cb8 in gs_text_begin (pgs=0x428d58, text=0x7fffffffce60,
mem=0x4028c8, ppte=0x7fffffffcf48)
at ./base/gstext.c:262
#12 0x00007ffff7779015 in gs_xyshow_begin (pgs=0x428d58, str=<value optimized
out>, size=<value optimized out>,
x_widths=0x882b08, y_widths=0x0, widths_size=6, mem=0x4028c8,
ppte=0x7fffffffcf48) at ./base/gstext.c:413
#13 0x00007ffff74f1777 in moveshow (i_ctx_p=0x444d50, have_x=1, have_y=0) at
./psi/zcharx.c:113
#14 0x00007ffff75592eb in interp (pi_ctx_p=0x402388, pref=<value optimized
out>, perror_object=0x7fffffffde20)
at ./psi/interp.c:1263
In other words, the Device2PCS->CLut16params.Interp3D callback passed
to cmsEvalLUT is null. In fact, the entire CLut16params struct
consists of zeroes. The relevant Device2PCS structure has few nonzero
fields:
.wFlags = 584,
.InputChan = 3,
.OutputChan = 3,
.OutputEntries = 2,
.L2 = {0x72ea80, 0x72efc0, 0x729e70, 0, ...},
.Out16params = {
.nSamples = 2,
.nInputs = 1,
.nOutputs = 1,
.Domain = 1,
},
.Mat4 = {
.v = {
[0] = {.n = {14870, 11683, 5040},},
[1] = {.n = {7908, 22229, 2630},},
[2] = {.n = {467, 2684, 23883},},
}
},
.L4 = {0x78ebc0, 0x78efd0, 0x78f3e0, 0, ...},
.L4params = {
.nSamples = 512,
.nInputs = 1,
.nOutputs = 1,
.Domain = 511,
},
.L4Entries = 512
That structure is filled by cmsReadICCLut, which calls
ReadLUT_A2B(Icc, NewLUT, offset, sig) to fill it. What this all means
is beyond my expertise. Hints?
$ dpkg-query -W liblcms1
liblcms1 1.18.dfsg-1.2
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