From 5fe71fda89745fc3cd95f70d06e9162b595c3702 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 17 Jan 2025 12:36:14 +0300 Subject: [PATCH] tipc: re-order conditions in tipc_crypto_key_rcv() On a 32bit system the "keylen + sizeof(struct tipc_aead_key)" math could have an integer wrapping issue. It doesn't matter because the "keylen" is checked on the next line, but just to make life easier for static analysis tools, let's re-order these conditions and avoid the integer overflow. Signed-off-by: Dan Carpenter Reviewed-by: Simon Horman Signed-off-by: David S. Miller --- net/tipc/crypto.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c index 43c3f1c971b8f..c524421ec6525 100644 --- a/net/tipc/crypto.c +++ b/net/tipc/crypto.c @@ -2293,8 +2293,8 @@ static bool tipc_crypto_key_rcv(struct tipc_crypto *rx, struct tipc_msg *hdr) keylen = ntohl(*((__be32 *)(data + TIPC_AEAD_ALG_NAME))); /* Verify the supplied size values */ - if (unlikely(size != keylen + sizeof(struct tipc_aead_key) || - keylen > TIPC_AEAD_KEY_SIZE_MAX)) { + if (unlikely(keylen > TIPC_AEAD_KEY_SIZE_MAX || + size != keylen + sizeof(struct tipc_aead_key))) { pr_debug("%s: invalid MSG_CRYPTO key size\n", rx->name); goto exit; }