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authordsinclair <dsinclair@chromium.org>2016-06-07 09:48:39 -0700
committerCommit bot <commit-bot@chromium.org>2016-06-07 09:48:39 -0700
commit8975902470dbfc15289b69f41e43ad0433ca51ae (patch)
tree8a83a3b3501e00092b11b62e92007141c6e479bd /xfa/fde
parent720217d3f9e65b8237748f01ffbd4a296f81612e (diff)
downloadpdfium-8975902470dbfc15289b69f41e43ad0433ca51ae.tar.xz
Verify we have a CJBig2_Image before attempting use.
In CJBig2_SDDProc::decode_Arith we will set a SDNEWSYMS value to nullptr if the height or width are 0. With the PDF from the bug, all of the decoders are set to nullptr. Then, we call into CJBig2_TRDProc::decode_Arith and pull out one of the nullptr decoders and attempt to use it, crashing. This CL adds a check that we have a non-null decoder before attempting to use the decoder. BUG=pdfium:511 Review-Url: https://codereview.chromium.org/2048683002
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