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exofs: check for allocation failure in uri_store()

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There is no memory allocation failure check in uri_store().
That can lead to NULL pointer dereference.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <[email protected]>
Signed-off-by: Boaz Harrosh <[email protected]>
This commit is contained in:
Alexey Khoroshilov 2012-08-08 21:02:37 +04:00 • committed by Boaz Harrosh
commit b8017d2957
1 changed files with 6 additions and 1 deletions
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7
fs/exofs/sys.c
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@ -80,8 +80,13 @@ static ssize_t uri_show(struct exofs_dev *edp, char *buf)
static ssize_t uri_store(struct exofs_dev *edp, const char *buf, size_t len)
{
uint8_t *new_uri;
edp->urilen = strlen(buf) + 1;
edp->uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL);
new_uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL);
if (new_uri == NULL)
return -ENOMEM;
edp->uri = new_uri;
strncpy(edp->uri, buf, edp->urilen);
return edp->urilen;
}