The patch titled
bh: ensure bh fits within a page
has been removed from the -mm tree. Its filename is
bh-ensure-bh-fits-within-a-page.patch
This patch was dropped because it is obsolete
------------------------------------------------------
Subject: bh: ensure bh fits within a page
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
There is a bug in jbd with slab debugging enabled where it was submitting a
bh obtained via jbd_rep_kmalloc which crossed a page boundary. A lot of
time was spent on tracking this down because the symptoms were far off from
where the problem was.
This patch adds a sanity check to submit_bh so we can immediately spot
anyone doing similar things in future.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/buffer.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/buffer.c~bh-ensure-bh-fits-within-a-page fs/buffer.c
--- a/fs/buffer.c~bh-ensure-bh-fits-within-a-page
+++ a/fs/buffer.c
@@ -2790,6 +2790,7 @@ int submit_bh(int rw, struct buffer_head
BUG_ON(!buffer_locked(bh));
BUG_ON(!buffer_mapped(bh));
BUG_ON(!bh->b_end_io);
+ WARN_ON(bh_offset(bh) + bh->b_size > PAGE_SIZE);
if (buffer_ordered(bh) && (rw == WRITE))
rw = WRITE_BARRIER;
_
Patches currently in -mm which might be from herbert@xxxxxxxxxxxxxxxxxxx are
git-cryptodev.patch
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