KMSAN: uninit-value in _copy_to_iter (2)
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Message ID
State New
Headers show

Commit Message

Michael S. Tsirkin June 7, 2018, 5:10 p.m. UTC
#syz test: master

Subject: vhost: fix info leak

Fixes: CVE-2018-1118
Signed-off-by: Michael S. Tsirkin <>


syzbot June 7, 2018, 5:31 p.m. UTC | #1

syzbot has tested the proposed patch and the reproducer did not trigger  


Tested on:

commit:         c6a6aed994b6 kmsan: remove dead code to trigger syzbot build
git tree:
kernel config:
compiler:       clang version 7.0.0 (trunk 334104)

Note: testing is done by a robot and is best-effort only.

diff mbox

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index f0be5f35ab28..9beefa6ed1ce 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2345,6 +2345,9 @@  struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type)
 	struct vhost_msg_node *node = kmalloc(sizeof *node, GFP_KERNEL);
 	if (!node)
 		return NULL;
+	/* Make sure all padding within the structure is initialized. */
+	memset(&node->msg, 0, sizeof node->msg);
 	node->vq = vq;
 	node->msg.type = type;
 	return node;