From: Jeongjun Park <aha310510@gmail.com>
To: syzbot+6c21aeb59d0e82eb2782@syzkaller.appspotmail.com
Cc: stefanha@redhat.com, sgarzare@redhat.com, mst@redhat.com,
jasowang@redhat.com, kvm@vger.kernel.org,
virtualization@lists.linux.dev, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com,
Jeongjun Park <aha310510@gmail.com>
Subject: [PATCH virt] virt: fix uninit-value in vhost_vsock_dev_open
Date: Sat, 20 Apr 2024 17:57:50 +0900 [thread overview]
Message-ID: <20240420085750.64274-1-aha310510@gmail.com> (raw)
In-Reply-To: <000000000000be4e1c06166fdc85@google.com>
Change vhost_vsock_dev_open() to use kvzalloc() instead of kvmalloc()
to avoid uninit state.
Reported-by: syzbot+6c21aeb59d0e82eb2782@syzkaller.appspotmail.com
Fixes: dcda9b04713c ("mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic")
Signed-off-by: Jeongjun Park <aha310510@gmail.com>
---
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
next prev parent reply other threads:[~2024-04-20 8:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-19 9:39 [syzbot] [virt?] [net?] KMSAN: uninit-value in vsock_assign_transport (2) syzbot
2024-04-19 12:39 ` Jeongjun Park
2024-04-19 14:44 ` syzbot
2024-04-19 14:56 ` Jeongjun Park
2024-04-19 15:39 ` syzbot
2024-04-20 8:57 ` Jeongjun Park [this message]
2024-04-20 10:05 ` [PATCH virt] virt: fix uninit-value in vhost_vsock_dev_open Michael S. Tsirkin
2024-04-21 3:06 ` Jeongjun Park
2024-04-22 13:00 ` Stefan Hajnoczi
2024-04-22 14:20 ` Michael S. Tsirkin
2024-04-22 14:18 ` [syzbot] [virt?] [net?] KMSAN: uninit-value in vsock_assign_transport (2) Michael S. Tsirkin
2024-04-23 1:31 ` syzbot
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