src/hb-ot-layout-gsubgpos-private.hh | 5 +++++ test/shaping/fonts/sha1sum/MANIFEST | 1 + test/shaping/fonts/sha1sum/fab39d60d758cb586db5a504f218442cd1395725.ttf |binary test/shaping/tests/fuzzed.tests | 1 + 4 files changed, 7 insertions(+)
New commits: commit 9cc1ed4fa68075b3b142a2737438109772dd0002 Author: Behdad Esfahbod <beh...@behdad.org> Date: Thu Nov 19 12:39:09 2015 -0800 Do not allow recursiving to same position and same lookup This is just to make it harder to be extremely slow. There definitely are ways still, just harder. Oh well... how do we tame this problem without solving halting problem?! Fixes https://github.com/behdad/harfbuzz/issues/174 diff --git a/src/hb-ot-layout-gsubgpos-private.hh b/src/hb-ot-layout-gsubgpos-private.hh index 36f6dd4..2873d0f 100644 --- a/src/hb-ot-layout-gsubgpos-private.hh +++ b/src/hb-ot-layout-gsubgpos-private.hh @@ -971,6 +971,11 @@ static inline bool apply_lookup (hb_apply_context_t *c, if (idx >= count) continue; + /* Don't recurse to ourself at same position. + * Note that this test is too naive, it doesn't catch longer loops. */ + if (idx == 0 && lookupRecord[i].lookupListIndex == c->lookup_index) + continue; + buffer->move_to (match_positions[idx]); unsigned int orig_len = buffer->backtrack_len () + buffer->lookahead_len (); diff --git a/test/shaping/fonts/sha1sum/MANIFEST b/test/shaping/fonts/sha1sum/MANIFEST index cb5abe2..86871aa 100644 --- a/test/shaping/fonts/sha1sum/MANIFEST +++ b/test/shaping/fonts/sha1sum/MANIFEST @@ -34,3 +34,4 @@ df768b9c257e0c9c35786c47cae15c46571d56be.ttf e207635780b42f898d58654b65098763e340f5c7.ttf ef86fe710cfea877bbe0dbb6946a1f88d0661031.ttf f499fbc23865022234775c43503bba2e63978fe1.ttf +fab39d60d758cb586db5a504f218442cd1395725.ttf diff --git a/test/shaping/fonts/sha1sum/fab39d60d758cb586db5a504f218442cd1395725.ttf b/test/shaping/fonts/sha1sum/fab39d60d758cb586db5a504f218442cd1395725.ttf new file mode 100644 index 0000000..451ed04 Binary files /dev/null and b/test/shaping/fonts/sha1sum/fab39d60d758cb586db5a504f218442cd1395725.ttf differ diff --git a/test/shaping/tests/fuzzed.tests b/test/shaping/tests/fuzzed.tests index 23a691e..6d4aa00 100644 --- a/test/shaping/tests/fuzzed.tests +++ b/test/shaping/tests/fuzzed.tests @@ -7,3 +7,4 @@ fonts/sha1sum/8240789f6d12d4cfc4b5e8e6f246c3701bcf861f.ttf:--font-funcs=ot:U+004 fonts/sha1sum/b9e2aaa0d75fcef6971ec3a96d806ba4a6b31fe2.ttf:--font-funcs=ot:U+0041:[gid0=0+1000|gid1=0+1000|gid8=0+1000|gid3=0+1000|gid0=0+1000|gid1=0+1000|gid1=0+1000|gid8=0+1000|gid3=0+1000|gid0=0+1000|gid1=0+1000|gid8=0+1000|gid3=0+1000|gid0=0+1000|gid1=0+1000|gid1=0+1000] fonts/sha1sum/43979b90b2dd929723cf4fe1715990bcb9c9a56b.ttf:--font-funcs=ot:U+0041:[gid0=0+1000] fonts/sha1sum/3511ff5c1647150595846ac414c595cccac34f18.ttf:--font-funcs=ot:U+0041:[gid0=0+1000|gid512=0+1000|gid15104=0+1000|gid11004=0+1000|gid3408=0+1000|gid18244=0+1000|gid17872=0+1000|gid17961=0+1000|gid0=0+1000|gid992=0+1000|gid15616=0+1000|gid0=0+1000|gid14151=0+1000|gid20559=0+1000|gid20992=0+1000|gid5440=0+1000|gid256=0+1000|gid0=0+1000|gid10=0+1000|gid8960=0+1000|gid256=0+1000|gid1024=0+1000|gid1490=0+1000|gid0=0+1000|gid768=0+1000|gid4096=0+1000|gid256=0+1000|gid2216=0+1000|gid0=0+1000|gid256=0+1000|gid256=0+1000|gid0=0+1000|gid768=0+1000|gid10752=0+1000|gid11004=0+1000|gid3408=0+1000|gid18244=0+1000|gid17734=0+1000|gid53248=0+1000|gid256=0+1000|gid0=0+1000|gid512=0+1000|gid14848=0+1000|gid10793=0+1000|gid57344=0+1000|gid768=0+1000|gid18227=0+1000|gid20285=0+1000|gid20480=0+1000|gid0=0+1000|gid256=0+1000|gid0=0+1000|gid810=0+1000|gid0=0+1000|gid11004=0+1000|gid3408=0+1000|gid18244=0+1000|gid17734=0+1000|gid53289=0+1000|gid57344=0+1000|gid768=0+1000|gid15667=0+1000|gid71=0+ 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