From d98ddadd79ae45dec44f191986bf59136dd15e88 Mon Sep 17 00:00:00 2001
From: Frans Kaashoek <kaashoek@mit.edu>
Date: Tue, 20 Aug 2019 12:46:56 -0400
Subject: Also release buffer on failed copyout
---
kernel/fs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(limited to 'kernel')
diff --git a/kernel/fs.c b/kernel/fs.c
index da9bcca..5505408 100644
--- a/kernel/fs.c
+++ b/kernel/fs.c
@@ -470,8 +470,10 @@ readi(struct inode *ip, int user_dst, uint64 dst, uint off, uint n)
for(tot=0; tot<n; tot+=m, off+=m, dst+=m){
bp = bread(ip->dev, bmap(ip, off/BSIZE));
m = min(n - tot, BSIZE - off%BSIZE);
- if(either_copyout(user_dst, dst, bp->data + (off % BSIZE), m) == -1)
+ if(either_copyout(user_dst, dst, bp->data + (off % BSIZE), m) == -1) {
+ brelse(bp);
break;
+ }
brelse(bp);
}
return n;
--
cgit v1.2.3