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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2012-08-08 21:02:37 +0400
committerBoaz Harrosh <bharrosh@panasas.com>2012-08-12 21:54:44 +0300
commitb8017d2957fb0ebf0c2aa91d48f2465f6f799738 (patch)
tree10910f00c4f4e4fa8ad00a64ba3e8e181900418c
parent0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff)
exofs: check for allocation failure in uri_store()
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 <khoroshilov@ispras.ru> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
-rw-r--r--fs/exofs/sys.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/exofs/sys.c b/fs/exofs/sys.c
index 5a7b691..1b4f2f9 100644
--- a/fs/exofs/sys.c
+++ b/fs/exofs/sys.c
@@ -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;
}