netdev - [net] tipc: fix link name length check

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Date:   Tue, 26 Nov 2019 13:52:55 +1100
From:   john.rutherford@...tech.com.au
To:     davem@...emloft.net, netdev@...r.kernel.org,
        tipc-discussion@...ts.sourceforge.net
Cc:     John Rutherford <john.rutherford@...tech.com.au>
Subject: [net] tipc: fix link name length check

From: John Rutherford <john.rutherford@...tech.com.au>

In commit 4f07b80c9733 ("tipc: check msg->req data len in
tipc_nl_compat_bearer_disable") the same patch code was copied into
routines: tipc_nl_compat_bearer_disable(),
tipc_nl_compat_link_stat_dump() and tipc_nl_compat_link_reset_stats().
The two link routine occurrences should have been modified to check
the maximum link name length and not bearer name length.

Fixes: 4f07b80c9733 ("tipc: check msg->reg data len in tipc_nl_compat_bearer_disable")
Signed-off-by: John Rutherford <john.rutherford@...tech.com.au>
Acked-by: Jon Maloy <jon.maloy@...csson.com>
---
 net/tipc/netlink_compat.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index e135d4e11231..d4d2928424e2 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -550,7 +550,7 @@ static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
 	if (len <= 0)
 		return -EINVAL;
 
-	len = min_t(int, len, TIPC_MAX_BEARER_NAME);
+	len = min_t(int, len, TIPC_MAX_LINK_NAME);
 	if (!string_is_valid(name, len))
 		return -EINVAL;
 
@@ -822,7 +822,7 @@ static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
 	if (len <= 0)
 		return -EINVAL;
 
-	len = min_t(int, len, TIPC_MAX_BEARER_NAME);
+	len = min_t(int, len, TIPC_MAX_LINK_NAME);
 	if (!string_is_valid(name, len))
 		return -EINVAL;
 
-- 
2.11.0