From 331f63bc7e8e80e914bb8fb93ef48381bc737feb Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Fri, 1 Jul 2022 21:43:49 +0200
Subject: kernel/fsroot: respect offset when reading root

---
 src/kernel/arch/i386/driver/fsroot.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/kernel/arch/i386/driver')

diff --git a/src/kernel/arch/i386/driver/fsroot.c b/src/kernel/arch/i386/driver/fsroot.c
index 4207541..bea89cd 100644
--- a/src/kernel/arch/i386/driver/fsroot.c
+++ b/src/kernel/arch/i386/driver/fsroot.c
@@ -74,7 +74,9 @@ static int handle(struct vfs_request *req) {
 						"ps2\0"
 						"ata/";
 					int len = min((size_t) req->output.len, sizeof(src));
-					virt_cpy_to(req->caller->pages, req->output.buf, src, len);
+					if (req->offset > len) return 0;
+					virt_cpy_to(req->caller->pages, req->output.buf,
+							src + req->offset, len - req->offset);
 					return len;
 				}
 				case HANDLE_VGA: {
-- 
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