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vsock_addr: Check for supported flag values 

Check if the provided flags value from the vsock address data structure
includes the supported flags in the corresponding kernel version.

The first byte of the "svm_zero" field is used as "svm_flags", so add
the flags check instead.

Changelog

v3 -> v4

* New patch in v4.

Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Andra Paraschiv 2020-12-14 18:11:20 +02:00 committed by Jakub Kicinski
parent caaf95e0f2
commit cada7ccd9d
1 changed files with 3 additions and 1 deletions
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4
net/vmw_vsock/vsock_addr.c
View File

@ -22,13 +22,15 @@ EXPORT_SYMBOL_GPL(vsock_addr_init);
int vsock_addr_validate(const struct sockaddr_vm *addr)
{
__u8 svm_valid_flags = VMADDR_FLAG_TO_HOST;
if (!addr)
return -EFAULT;
if (addr->svm_family != AF_VSOCK)
return -EAFNOSUPPORT;
if (addr->svm_zero[0] != 0)
if (addr->svm_flags & ~svm_valid_flags)
return -EINVAL;
return 0;