diff options
| -rw-r--r-- | qemu-timer.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/qemu-timer.c b/qemu-timer.c index 00a5d35c3f..c77de64301 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -314,7 +314,14 @@ int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout) return ppoll((struct pollfd *)fds, nfds, NULL, NULL); } else { struct timespec ts; - ts.tv_sec = timeout / 1000000000LL; + int64_t tvsec = timeout / 1000000000LL; + /* Avoid possibly overflowing and specifying a negative number of + * seconds, which would turn a very long timeout into a busy-wait. + */ + if (tvsec > (int64_t)INT32_MAX) { + tvsec = INT32_MAX; + } + ts.tv_sec = tvsec; ts.tv_nsec = timeout % 1000000000LL; return ppoll((struct pollfd *)fds, nfds, &ts, NULL); } |