From b528a54a708c4cd2149c8e6884af2063c2b272cd Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 17 Jun 2023 22:19:36 +0200
Subject: kernel: fix procfs overflow bug, add safeguard to prevent similar
 ones

---
 src/kernel/syscalls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/kernel/syscalls.c')

diff --git a/src/kernel/syscalls.c b/src/kernel/syscalls.c
index 66f8757..ebdf64e 100644
--- a/src/kernel/syscalls.c
+++ b/src/kernel/syscalls.c
@@ -295,7 +295,7 @@ long _sys_fs_respond(hid_t hid, const void __user *buf, long ret, int flags) {
 	if (!h || h->type != HANDLE_FS_REQ) SYSCALL_RETURN(-EBADF);
 	VfsReq *req = h->req;
 	if (req) {
-		if (req->output.len > 0 && ret > 0) {
+		if (ret > 0 && req->type == VFSOP_READ) {
 			// if this vfsop outputs data and ret is positive, it's the length of the buffer
 			// TODO document
 			// TODO move to vfsreq_finish
-- 
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