From e294f9814cfa0445cb04ab07d27534314b9b2889 Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Wed, 1 Apr 2026 16:51:12 -0300
Subject: [PATCH] poll: add check for nfds

---
 kernel-src/sys/syscalls/poll.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel-src/sys/syscalls/poll.c b/kernel-src/sys/syscalls/poll.c
index faa1d3a3..3496ca85 100644
--- a/kernel-src/sys/syscalls/poll.c
+++ b/kernel-src/sys/syscalls/poll.c
@@ -16,6 +16,11 @@ syscallret_t syscall_poll(context_t *, pollfd_t *fds, size_t nfds, int timeoutms
 		.ret = -1
 	};
 
+	if (nfds > FDTABLE_LIMIT) {
+		ret.errno = EINVAL;
+		return ret;
+	}
+
 	size_t fdsbuffsize = nfds * sizeof(pollfd_t);
 	pollfd_t *fdsbuff = alloc(fdsbuffsize);
 	if (fdsbuff == NULL) {