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fs/ecryptfs: Return -ENOMEM on memory allocation failure 

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>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
This commit is contained in:
Julia Lawall 2010-08-11 12:11:41 +02:00 committed by Tyler Hicks
parent 76be97c1fc
commit f137f15072
1 changed files with 2 additions and 0 deletions
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2
fs/ecryptfs/keystore.c
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@ -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;