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nfp: flower: Use struct_size() helper in kmalloc()

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Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worst scenario, could lead to heap overflows.

Also, address the following sparse warnings:
drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c:359:25: warning: using sizeof on a flexible structure

Link: https://github.com/KSPP/linux/issues/174
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gustavo A. R. Silva 2022-01-25 13:33:19 -06:00 committed by David S. Miller
parent 70b3c38b4c
commit 40cd4f1550
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
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@ -356,7 +356,7 @@ __nfp_tun_add_route_to_cache(struct list_head *route_list,
return 0;
}
entry = kmalloc(sizeof(*entry) + add_len, GFP_ATOMIC);
entry = kmalloc(struct_size(entry, ip_add, add_len), GFP_ATOMIC);
if (!entry) {
spin_unlock_bh(list_lock);
return -ENOMEM;