From: Robbie Ko <robbieko@xxxxxxxxxxxx>
When lock_delalloc_page, we first lock the page and then
check that the page dirty, if the page is not dirty, we
will return -EAGAIN but all pages must be freed, otherwise
page leak.
Signed-off-by: Robbie Ko <robbieko@xxxxxxxxxxxx>
---
fs/btrfs/extent_io.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 68c96057ad2d..34d55b1e2a88 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1951,7 +1951,7 @@ static int __process_pages_contig(struct address_space *mapping,
struct page *pages[16];
unsigned ret;
int err = 0;
- int i;
+ int i, j;
if (page_ops & PAGE_LOCK) {
ASSERT(page_ops == PAGE_LOCK);
@@ -1999,7 +1999,8 @@ static int __process_pages_contig(struct address_space *mapping,
if (!PageDirty(pages[i]) ||
pages[i]->mapping != mapping) {
unlock_page(pages[i]);
- put_page(pages[i]);
+ for (j = i; j < ret; j++)
+ put_page(pages[j]);
err = -EAGAIN;
goto out;
}
--
2.17.1
