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mctp: Use output netdev to allocate skb headroom

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Previously the skb was allocated with headroom MCTP_HEADER_MAXLEN,
but that isn't sufficient if we are using devs that are not MCTP
specific.

This also adds a check that the smctp_halen provided to sendmsg for
extended addressing is the correct size for the netdev.

Fixes: 833ef3b91d ("mctp: Populate socket implementation")
Reported-by: Matthew Rinaldi <mjrinal@g.clemson.edu>
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Johnston
2022-04-01 10:48:44 +08:00
committed by David S. Miller
parent 8ce40a2fd3
commit 4a9dda1c1d
3 changed files with 44 additions and 18 deletions
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2
include/net/mctp.h
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@@ -36,8 +36,6 @@ struct mctp_hdr {
#define MCTP_HDR_TAG_SHIFT 0
#define MCTP_HDR_TAG_MASK GENMASK(2, 0)
#define MCTP_HEADER_MAXLEN 4
#define MCTP_INITIAL_DEFAULT_NET 1
static inline bool mctp_address_unicast(mctp_eid_t eid)