From 8769f37868631983e7e73fc3bf514f92d9540ea2 Mon Sep 17 00:00:00 2001 From: Hendrik Date: Sun, 25 Jan 2026 15:46:56 +0100 Subject: [PATCH] Improve error handling for file descriptor range --- mrbgems/hal-posix-io/src/io_hal.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/mrbgems/hal-posix-io/src/io_hal.c b/mrbgems/hal-posix-io/src/io_hal.c index bf3f1630b..2283fdd7e 100644 --- a/mrbgems/hal-posix-io/src/io_hal.c +++ b/mrbgems/hal-posix-io/src/io_hal.c @@ -519,8 +519,8 @@ void mrb_hal_io_fdset_set(mrb_state *mrb, int fd, mrb_io_fdset *fdset) { (void)mrb; - if (fd >= FD_SETSIZE) { - mrb_raise(mrb, E_ARGUMENT_ERROR, "fd is larger than FD_SETSIZE"); + if (fd < 0 || fd >= FD_SETSIZE) { + mrb_raise(mrb, E_ARGUMENT_ERROR, "fd is out of range"); return; } if (fdset) { @@ -532,8 +532,8 @@ int mrb_hal_io_fdset_isset(mrb_state *mrb, int fd, mrb_io_fdset *fdset) { (void)mrb; - if (fd >= FD_SETSIZE) { - mrb_raise(mrb, E_ARGUMENT_ERROR, "fd is larger than FD_SETSIZE"); + if (fd < 0 || fd >= FD_SETSIZE) { + mrb_raise(mrb, E_ARGUMENT_ERROR, "fd is out of range"); return 0; } if (fdset) {