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chelsio/chtls: prevent potential integer overflow on 32bit

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The "gl->tot_len" variable is controlled by the user.  It comes from
process_responses().  On 32bit systems, the "gl->tot_len +
sizeof(struct cpl_pass_accept_req) + sizeof(struct rss_header)" addition
could have an integer wrapping bug.  Use size_add() to prevent this.

Fixes: a089439478 ("crypto: chtls - Register chtls with net tls")
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/c6bfb23c-2db2-4e1b-b8ab-ba3925c82ef5@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dan Carpenter 2024-12-13 12:47:27 +03:00 committed by Jakub Kicinski
parent c8eb0c3ffd
commit fbbd84af6b
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_main.c
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@ -346,8 +346,9 @@ static struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl,
* driver. Once driver synthesizes cpl_pass_accept_req the skb will go
* through the regular cpl_pass_accept_req processing in TOM.
*/
skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req)
- pktshift, GFP_ATOMIC);
skb = alloc_skb(size_add(gl->tot_len,
sizeof(struct cpl_pass_accept_req)) -
pktshift, GFP_ATOMIC);
if (unlikely(!skb))
return NULL;
__skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req)