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| author | Rich Felker <dalias@aerifal.cx> | 2012-04-30 02:56:47 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-04-30 02:56:47 -0400 |
| commit | 28c5d46d844684feba2ddfc9027ea308d8d3612c (patch) | |
| tree | fe917ab695dfae3277ef197376d769fb43a0a107 /src | |
| parent | e5a9b50e973aadff2e6303d01be8807b1fb9c325 (diff) | |
| download | musl-28c5d46d844684feba2ddfc9027ea308d8d3612c.tar.gz musl-28c5d46d844684feba2ddfc9027ea308d8d3612c.tar.xz musl-28c5d46d844684feba2ddfc9027ea308d8d3612c.zip | |
fix off-by-one error that caused uninitialized memory read in floatscan
this caused misreading of certain floating point values that are exact multiples of large powers of ten, unpredictable depending on prior stack contents.
Diffstat (limited to 'src')
| -rw-r--r-- | src/internal/floatscan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/internal/floatscan.c b/src/internal/floatscan.c index f80db383..4b335f5c 100644 --- a/src/internal/floatscan.c +++ b/src/internal/floatscan.c @@ -244,7 +244,7 @@ static long double decfloat(FILE *f, int c, int bits, int emin, int sign, int po /* Assemble desired bits into floating point variable */ for (y=i=0; i<LD_B1B_DIG; i++) { - if ((a+i & MASK)==z) x[z=(z+1 & MASK)] = 0; + if ((a+i & MASK)==z) x[(z=(z+1 & MASK))-1] = 0; y = 1000000000.0L * y + x[a+i & MASK]; } |