From: Dan Carpenter <[email protected]>
The "size" variable comes from the user so we need to verify that it's
large enough to hold an stp_policy_id struct.
Fixes: 7bd1d4093c2f ("stm class: Introduce an abstraction for System Trace
Module devices")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Alexander Shishkin <[email protected]>
---
drivers/hwtracing/stm/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
index 0e731143f6..9414900575 100644
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -566,7 +566,7 @@ static int stm_char_policy_set_ioctl(struct stm_file *stmf,
void __user *arg)
if (copy_from_user(&size, arg, sizeof(size)))
return -EFAULT;
- if (size >= PATH_MAX + sizeof(*id))
+ if (size < sizeof(*id) || size >= PATH_MAX + sizeof(*id))
return -EINVAL;
/*
--
2.14.1
