Re: [PATCH] net/sched: ematch: check nla_put_nohdr() return value in tcf_em_tree_dump()

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski [off-list ref]:

On Sat, 19 Sep 2026 21:06:24 +0000 you wrote:

When tcf_em_tree_dump() was converted from the legacy rtnetlink
`RTA_PUT_NOHDR` macro (which contained an implicit `goto
rtattr_failure;`) to `nla_put_nohdr()`, the return value check on
`nla_put_nohdr()` was omitted for container/simple matches and raw match
payloads.

If the netlink dump skb runs out of tailroom at `nla_put_nohdr()`, the
error is silently ignored and `match_start->nla_len` is finalized
without the match payload, emitting a malformed/truncated
TCA_EMATCH_TREE_LIST attribute to userspace instead of returning `-1`
via `nla_put_failure` so rtnetlink can reallocate and retry the dump.

[...]

Here is the summary with links:
  - net/sched: ematch: check nla_put_nohdr() return value in tcf_em_tree_dump()
    https://git.kernel.org/netdev/net-next/c/528de6832b21

You are awesome, thank you!
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