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| author | Robin Watts <robin.watts@artifex.com> | 2017-11-07 17:53:40 +0000 |
|---|---|---|
| committer | Robin Watts <robin.watts@artifex.com> | 2017-11-08 09:36:23 +0000 |
| commit | d18bc728e46c5a5708f14d27c2b6c44e1d0c3232 (patch) | |
| tree | abdcb02045caf591b9855315085142aae27acc07 | |
| parent | e664cdb39b3b1d55fd143239ec5d58f28bec3008 (diff) | |
| download | mupdf-d18bc728e46c5a5708f14d27c2b6c44e1d0c3232.tar.xz | |
Bug 698704: Fix for overflow check failing due to 'clever' compiler.
Adopt Josephs suggested fix for arithmetic overflow.
Thanks to Kan-Ru Chen for spotting the problem.
| -rw-r--r-- | source/pdf/pdf-xref.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/source/pdf/pdf-xref.c b/source/pdf/pdf-xref.c index ba2d575f..00586dbd 100644 --- a/source/pdf/pdf-xref.c +++ b/source/pdf/pdf-xref.c @@ -933,7 +933,7 @@ pdf_read_new_xref_section(fz_context *ctx, pdf_document *doc, fz_stream *stm, in pdf_xref_entry *table; int i, n; - if (i0 < 0 || i1 < 0 || (i0+i1) < 0) + if (i0 < 0 || i1 < 0 || i0 > INT_MAX - i1) fz_throw(ctx, FZ_ERROR_GENERIC, "negative xref stream entry index"); //if (i0 + i1 > pdf_xref_len(ctx, doc)) // fz_throw(ctx, FZ_ERROR_GENERIC, "xref stream has too many entries"); |