From 3c01bab8a306eb395d238717ea76e6da24f6acfe Mon Sep 17 00:00:00 2001
From: Tom Rhodes <trhodes@FreeBSD.org>
Date: Thu, 3 Jul 2003 14:54:47 +0000
Subject: [PATCH] If bread() returns a zero-length buffer, as can happen after
 a failed write, return an error instead of looping forever.

PR:		37035
Submitted by:	das
---
 sys/fs/msdosfs/msdosfs_vnops.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/fs/msdosfs/msdosfs_vnops.c b/sys/fs/msdosfs/msdosfs_vnops.c
index 6a8341451cc..bce6b0d151d 100644
--- a/sys/fs/msdosfs/msdosfs_vnops.c
+++ b/sys/fs/msdosfs/msdosfs_vnops.c
@@ -1571,6 +1571,10 @@ msdosfs_readdir(ap)
 			return (error);
 		}
 		n = min(n, blsize - bp->b_resid);
+		if (n == 0) {
+			brelse(bp);
+			return (EIO);
+		}
 
 		/*
 		 * Convert from dos directory entries to fs-independent