[PATCH] net/packet: Allow MSG_NOSIGNAL flag in packet_recvmsg

[Adnan Dizdarevic]

By adding MSG_NOSIGNAL flag to allowed flags in packet_recvmsg, this
patch fixes io_uring recvmsg operations returning -EINVAL when used with
packet socket file descriptors.

In io_uring, MSG_NOSIGNAL flag is added in:
io_uring/net.c/io_recvmsg_prep

Signed-off-by: Adnan Dizdarevic <adnan.dizdarevic@xxxxxxxxxxxx>
---
 net/packet/af_packet.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index d4e76e2ae153..5ce62194af9e 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3410,7 +3410,8 @@ static int packet_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 	unsigned int origlen = 0;
 
 	err = -EINVAL;
-	if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
+	if (flags & ~(MSG_PEEK | MSG_DONTWAIT | MSG_TRUNC | MSG_CMSG_COMPAT |
+			MSG_ERRQUEUE | MSG_NOSIGNAL))
 		goto out;
 
 #if 0
-- 
2.37.2