5 Commits

Author	SHA1	Message	Date
JF Bastien	8c253f7e88	Use common parse routine to read alignment values from bitcode ... While fuzzing LLVM bitcode files, I discovered that (1) the bitcode reader doesn't check that alignments are no larger than 2**29; (2) downstream code doesn't check the range; and (3) for values out of range, corresponding large memory requests (based on alignment size) will fail. This code fixes the bitcode reader to check for valid alignments, fixing this problem. This CL fixes alignment value on global variables, functions, and instructions: alloca, load, load atomic, store, store atomic. Patch by Karl Schimpf (kschimpf@google.com). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230180 91177308-0d34-0410-b5e6-96231b3b80d8	2015-02-22 19:32:03 +00:00
Filipe Cabecinhas	9183d13f45	[Bitcode reader] Fix a few assertions when reading invalid files ... Summary: When creating {insert,extract}value instructions from a BitcodeReader, we weren't verifying the fields were valid. Bugs found with afl-fuzz Reviewers: rafael Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D7325 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229345 91177308-0d34-0410-b5e6-96231b3b80d8	2015-02-16 00:03:11 +00:00
Filipe Cabecinhas	1897b5c08c	Check bit widths before trying to get a type. ... Added a test case for it. Also added run lines for the test case in r227566. Bugs found with afl-fuzz git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227589 91177308-0d34-0410-b5e6-96231b3b80d8	2015-01-30 18:13:50 +00:00
Filipe Cabecinhas	5d8bb5c7c5	[Bitcode] Diagnose errors instead of asserting from bad input ... Eventually we can make some of these pass the error along to the caller. Reports a fatal error if: We find an invalid abbrev record We try to get an invalid abbrev number We can't fill the current word due to an EOF Fixed an invalid bitcode test to check for output with FileCheck Bugs found with afl-fuzz git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226986 91177308-0d34-0410-b5e6-96231b3b80d8	2015-01-24 04:15:05 +00:00
Filipe Cabecinhas	293d3deea3	Use report_fatal_error instead of llvm_unreachable, so we don't crash on user input ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226248 91177308-0d34-0410-b5e6-96231b3b80d8	2015-01-16 04:54:12 +00:00