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RDMA/ucma: Limit possible option size
[pandora-kernel.git]
/
drivers
/
infiniband
/
core
/
ucma.c
diff --git
a/drivers/infiniband/core/ucma.c
b/drivers/infiniband/core/ucma.c
index
91e82b7
..
79d0333
100644
(file)
--- a/
drivers/infiniband/core/ucma.c
+++ b/
drivers/infiniband/core/ucma.c
@@
-1000,6
+1000,9
@@
static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
if (IS_ERR(ctx))
return PTR_ERR(ctx);
+ if (unlikely(cmd.optval > KMALLOC_MAX_SIZE))
+ return -EINVAL;
+
optval = kmalloc(cmd.optlen, GFP_KERNEL);
if (!optval) {
ret = -ENOMEM;