On 32 bit, if n is too large then "n * sizeof(*args->devs)" could
overflow and args->devs would be smaller than expected.
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
This is a static checker fix. I haven't tested this. Sorry for that.
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 726e59a..d50b274 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -305,6 +305,10 @@ __be32 decode_devicenotify_args(struct svc_rqst *rqstp,
n = ntohl(*p++);
if (n <= 0)
goto out;
+ if (n > ULONG_MAX / sizeof(*args->devs)) {
+ status = htonl(NFS4ERR_BADXDR);
+ goto out;
+ }
args->devs = kmalloc(n * sizeof(*args->devs), GFP_KERNEL);
if (!args->devs) {
--
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