diff options
Diffstat (limited to 'stdlib/random_r.c')
| -rw-r--r-- | stdlib/random_r.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/stdlib/random_r.c b/stdlib/random_r.c index 605e96983c..b49f03f5be 100644 --- a/stdlib/random_r.c +++ b/stdlib/random_r.c @@ -390,9 +390,10 @@ __random_r (struct random_data *buf, int32_t *result) int32_t *end_ptr = buf->end_ptr; uint32_t val; - val = read_state (rptr, 0); - int32_t t = read_state (fptr, 0); - write_state (fptr, 0, t + val); + /* Avoid integer overflow with uint32_t arihmetic. */ + val = read_state (fptr, 0); + val += read_state (rptr, 0); + write_state (fptr, 0, val); /* Chucking least random bit. */ *result = val >> 1; ++fptr; |