From add659ce894352e967905ddf74683f28d2c2e44e Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 7 Feb 2024 22:22:03 +0100
Subject: Kernel: poll() should skip invalid file descriptors

---
 kernel/poll.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'kernel/poll.c')

diff --git a/kernel/poll.c b/kernel/poll.c
index ee92a8c..5181417 100644
--- a/kernel/poll.c
+++ b/kernel/poll.c
@@ -13,6 +13,9 @@ int poll(struct pollfd *fds, size_t nfds, int timeout) {
     if (fds[i].fd < 0)
       continue;
     vfs_fd_t *f = get_vfs_fd(fds[i].fd);
+    if (NULL == f) {
+      continue;
+    }
     if (fds[i].events & POLLIN)
       read_locks[i] = create_read_fdhalt(f);
     if (fds[i].events & POLLOUT)
-- 
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