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| author | liubo <liubo2009@cn.fujitsu.com> | 2011-01-26 06:22:08 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-01-28 16:40:36 -0500 |
| commit | 2a29edc6b60a5248ccab588e7ba7dad38cef0235 (patch) | |
| tree | 45a7939e9e061cb2f06b09ae5f48aa79853e1250 /fs/btrfs/file.c | |
| parent | 6b82ce8d824bd46053e46a895876cde39d9026e4 (diff) | |
| download | op-kernel-dev-2a29edc6b60a5248ccab588e7ba7dad38cef0235.zip op-kernel-dev-2a29edc6b60a5248ccab588e7ba7dad38cef0235.tar.gz | |
btrfs: fix several uncheck memory allocations
To make btrfs more stable, add several missing necessary memory allocation
checks, and when no memory, return proper errno.
We've checked that some of those -ENOMEM errors will be returned to
userspace, and some will be catched by BUG_ON() in the upper callers,
and none will be ignored silently.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/file.c')
| -rw-r--r-- | 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 f903433..65b2424 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -945,6 +945,10 @@ 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; |
