Hi Linus/Andrew,
Please apply the below patch. It fixes a crash in NTFS on architectures
where flush_dcache_page() is a real function. I never noticed this as all
my testing is done on i386 where flush_dcache_page() is NULL.
Many thanks to Pauline Ng for the detailed bug report and analysis!
Best regards,
Anton
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/
---
[NTFS] Fix critical bug in ntfs_flush_dcache_pages().
Many thanks to Pauline Ng for the detailed bug report and analysis!
Signed-off-by: Anton Altaparmakov <[email protected]>
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index c63a83e..36e1e13 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -1484,14 +1484,15 @@ static inline void ntfs_flush_dcache_pag
unsigned nr_pages)
{
BUG_ON(!nr_pages);
+ /*
+ * Warning: Do not do the decrement at the same time as the call to
+ * flush_dcache_page() because it is a NULL macro on i386 and hence the
+ * decrement never happens so the loop never terminates.
+ */
do {
- /*
- * Warning: Do not do the decrement at the same time as the
- * call because flush_dcache_page() is a NULL macro on i386
- * and hence the decrement never happens.
- */
+ --nr_pages;
flush_dcache_page(pages[nr_pages]);
- } while (--nr_pages > 0);
+ } while (nr_pages > 0);
}
/**
-
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