From 705a79f82560ff6472cebed86aa5db04cdea3bce Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Wed, 30 Nov 2016 14:59:27 +0100
Subject: libio: Limit buffer size to 8192 bytes [BZ #4099]

This avoids overly large buffers with network file systems which report
very large block sizes.
---
 libio/filedoalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libio/filedoalloc.c')

diff --git a/libio/filedoalloc.c b/libio/filedoalloc.c
index 4f9d738968..ded0725356 100644
--- a/libio/filedoalloc.c
+++ b/libio/filedoalloc.c
@@ -94,7 +94,7 @@ _IO_file_doallocate (_IO_FILE *fp)
 	    fp->_flags |= _IO_LINE_BUF;
 	}
 #if _IO_HAVE_ST_BLKSIZE
-      if (st.st_blksize > 0)
+      if (st.st_blksize > 0 && st.st_blksize < _IO_BUFSIZ)
 	size = st.st_blksize;
 #endif
     }
-- 
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