diff options
Diffstat (limited to 'app-arch/bzip2/files/bzip2-1.0.6-ubsan-error.patch')
| -rw-r--r-- | app-arch/bzip2/files/bzip2-1.0.6-ubsan-error.patch | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/app-arch/bzip2/files/bzip2-1.0.6-ubsan-error.patch b/app-arch/bzip2/files/bzip2-1.0.6-ubsan-error.patch new file mode 100644 index 000000000000..84b811177ed5 --- /dev/null +++ b/app-arch/bzip2/files/bzip2-1.0.6-ubsan-error.patch @@ -0,0 +1,24 @@ +Author: Manoj Gupta <manojgupta@google.com> + +Use unsigned 1 for shifting instead of signed 1. + +This fixed an issue with shift caught by undefined behavior +sanitizer in clang. +bzip2-1.0.6/blocksort.c:255:7 +runtime error: left shift of 1 by 31 places cannot be represented in type 'int' + +--- a/blocksort.c ++++ b/blocksort.c +@@ -202,9 +202,9 @@ void fallbackQSort3 ( UInt32* fmap, + bhtab [ 0 .. 2+(nblock/32) ] destroyed + */ + +-#define SET_BH(zz) bhtab[(zz) >> 5] |= (1 << ((zz) & 31)) +-#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~(1 << ((zz) & 31)) +-#define ISSET_BH(zz) (bhtab[(zz) >> 5] & (1 << ((zz) & 31))) ++#define SET_BH(zz) bhtab[(zz) >> 5] |= (1u << ((zz) & 31)) ++#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~(1u << ((zz) & 31)) ++#define ISSET_BH(zz) (bhtab[(zz) >> 5] & (1u << ((zz) & 31))) + #define WORD_BH(zz) bhtab[(zz) >> 5] + #define UNALIGNED_BH(zz) ((zz) & 0x01f) + |