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Subject[PATCH net-next v4 3/5] vsock_addr: Check for supported flag values
Date
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>
---
net/vmw_vsock/vsock_addr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/vmw_vsock/vsock_addr.c b/net/vmw_vsock/vsock_addr.c
index 909de26cb0e70..223b9660a759f 100644
--- a/net/vmw_vsock/vsock_addr.c
+++ b/net/vmw_vsock/vsock_addr.c
@@ -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;
--
2.20.1 (Apple Git-117)



Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania. Registration number J22/2621/2005.

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