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Author SHA1 Message Date
Florian Hahn 19d3fdb08b Recommit "[BitcodeReader] Validate OpNum, before accessing Record array." 
This recommits r365750 (git commit 8b222ecf27)

Original message:

   Currently invalid bitcode files can cause a crash, when OpNum exceeds
   the number of elements in Record, like in the attached bitcode file.

   The test case was generated by clusterfuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15698

   Reviewers: t.p.northover, thegameg, jfb

   Reviewed By: jfb

   Differential Revision: https://reviews.llvm.org/D64507

   llvm-svn: 365750jkkkk

llvm-svn: 366018
 2019-07-14 14:06:25 +00:00
Florian Hahn 3b9994615f Revert [BitcodeReader] Validate OpNum, before accessing Record array. 
This reverts r365750 (git commit 8b222ecf27)

llvm-dis runs out of memory while opening invalid-fcmp-opnum.bc on
llvm-hexagon-elf, probably because the bitcode file contains other
suspicious values.

http://lab.llvm.org:8011/builders/llvm-hexagon-elf/builds/21949

llvm-svn: 365757
 2019-07-11 10:53:40 +00:00
Florian Hahn 8b222ecf27 [BitcodeReader] Validate OpNum, before accessing Record array. 
Currently invalid bitcode files can cause a crash, when OpNum exceeds
the number of elements in Record, like in the attached bitcode file.

The test case was generated by clusterfuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15698

Reviewers: t.p.northover, thegameg, jfb

Reviewed By: jfb

Differential Revision: https://reviews.llvm.org/D64507

llvm-svn: 365750
 2019-07-11 09:57:00 +00:00