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commit 705a79f82560ff6472cebed86aa5db04cdea3bce
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Nov 30 14:59:27 2016 +0100
libio: Limit buffer size to 8192 bytes [BZ #4099]
This avoids overly large buffers with network file systems which report
very large block sizes.
Index: b/libio/filedoalloc.c
===================================================================
--- a/libio/filedoalloc.c
+++ b/libio/filedoalloc.c
@@ -121,7 +121,7 @@ _IO_file_doallocate (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
}