diff options
| -rw-r--r-- | util/cutils.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/util/cutils.c b/util/cutils.c index fd591cadf0..77acadc70a 100644 --- a/util/cutils.c +++ b/util/cutils.c @@ -239,10 +239,12 @@ static int do_strtosz(const char *nptr, const char **end, goto out; } /* - * Values >= 0xfffffffffffffc00 overflow uint64_t after their trip - * through double (53 bits of precision). + * Values near UINT64_MAX overflow to 2**64 when converting to double + * precision. Compare against the maximum representable double precision + * value below 2**64, computed as "the next value after 2**64 (0x1p64) in + * the direction of 0". */ - if ((val * mul >= 0xfffffffffffffc00) || val < 0) { + if ((val * mul > nextafter(0x1p64, 0)) || val < 0) { retval = -ERANGE; goto out; } |