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authorLi Zefan <lizf@cn.fujitsu.com>2010-11-09 08:27:27 +0800
committerLi Zefan <lizf@cn.fujitsu.com>2010-12-22 23:15:43 +0800
commit4b72029dc3fd6ba7dc45ccd1cf0aa0ebfa209bd3 (patch)
tree116285c40ed2fa30e91d164e2e16e0d82ae450f9 /fs/btrfs/zlib.c
parent8844355df7f4e091b03cc131e1549631238b397b (diff)
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btrfs: Fix error handling in zlib
Return failure if alloc_page() fails to allocate memory, and the upper code will just give up compression. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to 'fs/btrfs/zlib.c')
-rw-r--r--fs/btrfs/zlib.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index e5b8b22..b015586 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 = -1;
+ 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 = -1;
+ goto out;
+ }
cpage_out = kmap(out_page);
pages[nr_pages] = out_page;
nr_pages++;