4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Shigeru Yoshida <syoshida@xxxxxxxxxx>
[ Upstream commit fa96c6baef1b5385e2f0c0677b32b3839e716076 ]
tipc_udp_addr2str() should return non-zero value if the UDP media
address is invalid. Otherwise, a buffer overflow access can occur in
tipc_media_addr_printf(). Fix this by returning 1 on an invalid UDP
media address.
Fixes: d0f91938bede ("tipc: add ip/udp media type")
Signed-off-by: Shigeru Yoshida <syoshida@xxxxxxxxxx>
Reviewed-by: Tung Nguyen <tung.q.nguyen@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/tipc/udp_media.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 1d62354797061..796309b50bb6a 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -127,8 +127,11 @@ static int tipc_udp_addr2str(struct tipc_media_addr *a, char *buf, int size)
snprintf(buf, size, "%pI4:%u", &ua->ipv4, ntohs(ua->port));
else if (ntohs(ua->proto) == ETH_P_IPV6)
snprintf(buf, size, "%pI6:%u", &ua->ipv6, ntohs(ua->port));
- else
+ else {
pr_err("Invalid UDP media address\n");
+ return 1;
+ }
+
return 0;
}
--
2.43.0
