[PATCH net-next v4 3/5] vsock_addr: Check for supported flag values
From: Andra Paraschiv <hidden>
Date: 2020-12-14 16:15:46
Also in:
lkml
Subsystem:
networking [general], the rest, vm sockets (af_vsock) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Stefano Garzarella
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 <redacted> --- 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)
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