Return failure if alloc_page() fails to allocate memory,
and the upper code will just give up compression.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
---
fs/btrfs/zlib.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index e5b8b22..5a8ba17 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -225,6 +225,10 @@ int btrfs_zlib_compress_pages(struct address_space *mapping,
data_in = kmap(in_page);
out_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM);
+ if (out_page == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
cpage_out = kmap(out_page);
pages[0] = out_page;
nr_pages = 1;
@@ -263,6 +267,10 @@ int btrfs_zlib_compress_pages(struct address_space *mapping,
goto out;
}
out_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM);
+ if (out_page == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
cpage_out = kmap(out_page);
pages[nr_pages] = out_page;
nr_pages++;
-- 1.7.3.1
--
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