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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2023-09-15 13:12:38 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-20 11:51:52 +0100 |
| commit | 065cb7ae3f157834715bf0dab1709461b8cc08d3 (patch) | |
| tree | d87611d4e8e172590b7e1b360a9cbee34e21c732 /net/tls | |
| parent | 8ae187386420c4d8366cfab812bb6478fcfcdd59 (diff) | |
| download | linux-stable-065cb7ae3f157834715bf0dab1709461b8cc08d3.tar.gz linux-stable-065cb7ae3f157834715bf0dab1709461b8cc08d3.tar.bz2 linux-stable-065cb7ae3f157834715bf0dab1709461b8cc08d3.zip | |
tls: Use size_add() in call to struct_size()
[ Upstream commit a2713257ee2be22827d7bc248302d408c91bfb95 ]
If, for any reason, the open-coded arithmetic causes a wraparound,
the protection that `struct_size()` adds against potential integer
overflows is defeated. Fix this by hardening call to `struct_size()`
with `size_add()`.
Fixes: b89fec54fd61 ("tls: rx: wrap decrypt params in a struct")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/tls')
| -rw-r--r-- | net/tls/tls_sw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 62d25f355d2c..2e60bf06adff 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -1512,7 +1512,7 @@ static int tls_decrypt_sg(struct sock *sk, struct iov_iter *out_iov, */ aead_size = sizeof(*aead_req) + crypto_aead_reqsize(ctx->aead_recv); aead_size = ALIGN(aead_size, __alignof__(*dctx)); - mem = kmalloc(aead_size + struct_size(dctx, sg, n_sgin + n_sgout), + mem = kmalloc(aead_size + struct_size(dctx, sg, size_add(n_sgin, n_sgout)), sk->sk_allocation); if (!mem) { err = -ENOMEM; |