From 36e1ed699210fd0173dfe0a8b2cde8a6b648ba3f Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 20 Jul 2007 15:21:36 +0200 Subject: [PATCH] splice: fix double page unlock 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 using fio. Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- fs/splice.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/splice.c b/fs/splice.c index e7d7080de2f9..d3c6668bdbdd 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -601,7 +601,7 @@ 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); @@ -657,8 +657,9 @@ find_page: */ mark_page_accessed(page); out: - page_cache_release(page); unlock_page(page); +out_release: + page_cache_release(page); out_ret: return ret; } -- 2.39.5