store to misaligned address / for type 'int64_t', which requires 8 byte alignment

[malaterre]

OpenEXR test suite fails on m68k and sparc64. OpenEXR rely on undefined behavior for accessing 8 byte aligned data.

Full backtrace is:

Running testCopyDeepScanLine

Testing raw data copy in DeepScanLineInput/OutputFile:

[New Thread 0xfffff80101c85910 (LWP 20279)]
[New Thread 0xfffff80102485910 (LWP 20280)]
[New Thread 0xfffff80102c85910 (LWP 20281)]
[New Thread 0xfffff80103485910 (LWP 20282)]
Testing files with 1 channels 100 times.
generating compression 0 writing copying
Program received signal SIGBUS, Bus error.
Imf_2_2::DeepScanLineInputFile::rawPixelData
(this=this@entry=0x7feffffef08, firstScanLine=,
pixelData=0x3cbb30 "", pixelDataSize=@0x7feffffeca0: 8220) at
ImfDeepScanLineInputFile.cpp:1464
1464 *(Int64 *) (pixelData+4) =sampleCountTableSize;
(gdb) bt full
#0 Imf_2_2::DeepScanLineInputFile::rawPixelData

(this=this@entry=0x7feffffef08, firstScanLine=,
pixelData=0x3cbb30 "", pixelDataSize=@0x7feffffeca0: 8220) at
ImfDeepScanLineInputFile.cpp:1464
minY = 51
lineBufferNumber =
lineOffset = 2220
lock = {_mutex = @0x33cc40, _locked = false}
yInFile = 51
sampleCountTableSize = 2152
packedDataSize = 6040
totalSizeRequired = 8220
big_enough =
#1 0xfffff801008836b8 in Imf_2_2::DeepScanLineOutputFile::copyPixels

(this=this@entry=0x7feffffef18, in=...) at
ImfDeepScanLineOutputFile.cpp:1480
unpackedDataSize =
dataSize = 8220
packedSampleCountSize =
packedDataSize =
sampleCountTable =
pixelData =
lock = {_mutex = @0x33c3c0, _locked = false}
hdr =
inHdr =
dataWindow =
data = std::vector of length 8220, capacity 8220 = {0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000', 0 '\000',
0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000', 0 '\000',
0 '\000'...}
#2 0x0000000000189994 in (anonymous namespace)::copyFile

(copy_filename="/var/tmp/IlmImfTest_EMVUZQZE/imf_test_copy_deep_scanline_copy.exr",
source_filename="/var/tmp/IlmImfTest_EMVUZQZE/imf_test_copy_deep_scanline_source.exr")
at testCopyDeepScanLine.cpp:224
in_file = {<Imf_2_2::GenericInputFile> =
{_vptr.GenericInputFile = 0xfffff80100a97bb0 <vtable for
Imf_2_2::DeepScanLineInputFile+16>}, _data = 0x33bfe0}
out_file = {<Imf_2_2::GenericOutputFile> =
{_vptr.GenericOutputFile = 0xfffff80100a97c00 <vtable for
Imf_2_2::DeepScanLineOutputFile+16>}, _data = 0x341190}
#3 (anonymous namespace)::readCopyWriteTest

(tempDir="/var/tmp/IlmImfTest_EMVUZQZE/",
channelCount=channelCount@entry=1, testTimes=testTimes@entry=100) at
testCopyDeepScanLine.cpp:404
compressionIndex = 0
compression = Imf_2_2::NO_COMPRESSION
i = 0
source_filename =
"/var/tmp/IlmImfTest_EMVUZQZE/imf_test_copy_deep_scanline_source.exr"
copy_filename =
"/var/tmp/IlmImfTest_EMVUZQZE/imf_test_copy_deep_scanline_copy.exr"
#4 0x0000000000189be8 in testCopyDeepScanLine

(tempDir="/var/tmp/IlmImfTest_EMVUZQZE/") at
testCopyDeepScanLine.cpp:428
numThreads = 0
PRETTY_FUNCTION = "void testCopyDeepScanLine(const string&)"
#5 0x0000000000118870 in main (argc=,

argv=0x7fefffff638) at main.cpp:182
rand48 = {_state = {6487, 20709, 10507}}
tempDir = "/var/tmp/IlmImfTest_EMVUZQZE/"
ss =
(gdb)

[malaterre]

Original bug report: https://bugs.debian.org/822583

[malaterre]

This is a lot of work to do: https://github.com/openexr/openexr/blob/master/OpenEXR/IlmImf/ImfXdr.h#L764

[cary-ilm]

Looking into the backlog of open OpenEXR issues. The OpenEXR maintainers don't have access to m68k or sparc64 machines, if anyone would like to volunteer a fix, we'd be happy to review it, but barring that, we have to say OpenEXR is not supported on those systems. Closing the issue for now, feel free to reopen or file a new issue if you'd like to pursue it further.