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| author | Jeremy Kerr <jk@codeconstruct.com.au> | 2024-02-19 12:51:54 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-02-22 15:32:55 +0300 |
| commit | 1394c1dec1c619a46867ed32791a29695372bff8 (patch) | |
| tree | 8158ab99710caf5a19bad1acc578a0b9901d0805 /net/core | |
| parent | 9acdc089c08884c1f1b4567efcd7290781ee8e3a (diff) | |
| download | linux-1394c1dec1c619a46867ed32791a29695372bff8.tar.xz | |
net: mctp: copy skb ext data when fragmenting
If we're fragmenting on local output, the original packet may contain
ext data for the MCTP flows. We'll want this in the resulting fragment
skbs too.
So, do a skb_ext_copy() in the fragmentation path, and implement the
MCTP-specific parts of an ext copy operation.
Fixes: 67737c457281 ("mctp: Pass flow data & flow release events to drivers")
Reported-by: Jian Zhang <zhangjian.3032@bytedance.com>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/skbuff.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index b9de3ee65ae6..1f918e602bc4 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -6850,6 +6850,14 @@ static struct skb_ext *skb_ext_maybe_cow(struct skb_ext *old, xfrm_state_hold(sp->xvec[i]); } #endif +#ifdef CONFIG_MCTP_FLOWS + if (old_active & (1 << SKB_EXT_MCTP)) { + struct mctp_flow *flow = skb_ext_get_ptr(old, SKB_EXT_MCTP); + + if (flow->key) + refcount_inc(&flow->key->refs); + } +#endif __skb_ext_put(old); return new; } |