Re: [syzbot] [virt?] [net?] KMSAN: uninit-value in vsock_assign_transport (2)

From: Jeongjun Park
Date: Fri Apr 19 2024 - 10:56:31 EST



please test uninit-value in vsock_assign_transport

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

---
drivers/vhost/vsock.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index ec20ecff85c7..652ef97a444b 100644
--- a/drivers/vhost/vsock.c
+++ b/drivers/vhost/vsock.c
@@ -656,7 +656,7 @@ static int vhost_vsock_dev_open(struct inode *inode, struct file *file)
/* This struct is large and allocation could fail, fall back to vmalloc
* if there is no other way.
*/
- vsock = kvmalloc(sizeof(*vsock), GFP_KERNEL | __GFP_RETRY_MAYFAIL);
+ vsock = kvzalloc(sizeof(*vsock), GFP_KERNEL | __GFP_RETRY_MAYFAIL);
if (!vsock)
return -ENOMEM;

--
2.34.1