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unix: handle cloexec failure in kqueue init

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Refactor uv__kqueue_init to use a temporary fd variable and properly
handle errors from uv__cloexec. If setting CLOEXEC fails, close the
kqueue fd and return the error instead of leaking the descriptor.

Fixes: https://github.com/libuv/libuv/issues/5081
Signed-off-by: Juan José Arboleda <soyjuanarbol@gmail.com>
This commit is contained in:
Juan José Arboleda 2026-03-27 17:38:10 -05:00
parent 901e28384b
commit 6b594943ba
1 changed files with 11 additions and 3 deletions
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14
src/unix/kqueue.c
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@ -50,12 +50,20 @@
int uv__kqueue_init(uv_loop_t* loop) {
loop->backend_fd = kqueue();
if (loop->backend_fd == -1)
int fd;
int err;
fd = kqueue();
if (fd == -1)
return UV__ERR(errno);
uv__cloexec(loop->backend_fd, 1);
err = uv__cloexec(fd, 1);
if (err) {
uv__close(fd);
return err;
}
loop->backend_fd = fd;
return 0;
}