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RDMA/rxe: Restore setting tot_len in the IPv4 header

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An earlier patch removed setting of tot_len in IPv4 headers because it was
also set in ip_local_out. However, this change resulted in an incorrect
ICRC being computed because the tot_len field is not masked out. This
patch restores that line. This fixes the bug reported by Zhu Yanjun.  This
bug affects anyone using rxe which is currently broken.

Fixes: 230bb836ee ("RDMA/rxe: Fix redundant call to ip_send_check")
Link: https://lore.kernel.org/r/20210729220039.18549-3-rpearsonhpe@gmail.com
Reported-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Reviewed-and-tested-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2021-07-29 17:00:39 -05:00 committed by Jason Gunthorpe
parent e2a05339fa
commit ef4b96a577
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/sw/rxe/rxe_net.c
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@ -259,6 +259,7 @@ static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb,
iph->version = IPVERSION;
iph->ihl = sizeof(struct iphdr) >> 2;
iph->tot_len = htons(skb->len);
iph->frag_off = df;
iph->protocol = proto;
iph->tos = tos;