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SubjectRe: [PATCH 4/5] fs/ecryptfs: Return -ENOMEM on memory allocation failure
Thanks Julia - Applied to
git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6.git#next

Tyler

On Wed Aug 11, 2010 at 12:11:41PM +0200, Julia Lawall <julia@diku.dk> wrote:
> From: Julia Lawall <julia@diku.dk>
>
> In this code, 0 is returned on memory allocation failure, even though other
> failures return -ENOMEM or other similar values.
>
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@
> expression ret;
> expression x,e1,e2,e3;
> @@
>
> ret = 0
> ... when != ret = e1
> *x = \(kmalloc\|kcalloc\|kzalloc\)(...)
> ... when != ret = e2
> if (x == NULL) { ... when != ret = e3
> return ret;
> }
> // </smpl>
>
> Signed-off-by: Julia Lawall <julia@diku.dk>
>
> ---
> fs/ecryptfs/keystore.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
> index 89c5476..73811cf 100644
> --- a/fs/ecryptfs/keystore.c
> +++ b/fs/ecryptfs/keystore.c
> @@ -515,6 +515,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
> if (!s) {
> printk(KERN_ERR "%s: Out of memory whilst trying to kmalloc "
> "[%zd] bytes of kernel memory\n", __func__, sizeof(*s));
> + rc = -ENOMEM;
> goto out;
> }
> s->desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
> @@ -806,6 +807,7 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
> if (!s) {
> printk(KERN_ERR "%s: Out of memory whilst trying to kmalloc "
> "[%zd] bytes of kernel memory\n", __func__, sizeof(*s));
> + rc = -ENOMEM;
> goto out;
> }
> s->desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;


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