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authorJens Axboe <jens.axboe@oracle.com>2007-07-20 15:18:12 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-20 09:07:01 -0700
commit6a860c979b35469e4d77da781a96bdb2ca05ae64 (patch)
tree3160a7a4c76743fa4ca9a9eb9ccb0d67bc363d9b /fs
parent9d1ca6f13cfedfd127f3be7e447bd6d922806a65 (diff)
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splice: fix bad unlock_page() in error case
If add_to_page_cache_lru() fails, the page will not be locked. But splice jumps to an error path that does a page release and unlock, causing a BUG() in unlock_page(). Fix this by adding one more label that just releases the page. This bug was actually triggered on EL5 by gurudas pai <gurudas.pai@oracle.com> using fio. Signed-off-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/splice.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/splice.c b/fs/splice.c
index 22496d2..0a09732 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -594,7 +594,7 @@ find_page:
ret = add_to_page_cache_lru(page, mapping, index,
GFP_KERNEL);
if (unlikely(ret))
- goto out;
+ goto out_release;
}
ret = mapping->a_ops->prepare_write(file, page, offset, offset+this_len);
@@ -650,8 +650,9 @@ find_page:
*/
mark_page_accessed(page);
out:
- page_cache_release(page);
unlock_page(page);
+out_release:
+ page_cache_release(page);
out_ret:
return ret;
}