set errno to -ENOMEM and goto out

Signed-off-by: JieJing.Zhang <[email protected]>
---
 fs/btrfs/file.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e354c33..e0fcb6c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -926,6 +926,10 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
                     PAGE_CACHE_SIZE, PAGE_CACHE_SIZE /
                     (sizeof(struct page *)));
        pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL);
+       if (!pages) {
+               ret = -ENOMEM;
+               goto out;
+       }
 
        /* generic_write_checks can change our pos */
        start_pos = pos;
-- 
1.7.0.4

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