Re: [PATCH net v2] sctp: fix addip_serial increment on ASCONF_ACK allocation failure

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <[email protected]>:

On Tue,  4 Aug 2026 10:55:14 +0800 you wrote:
> From: Qing Luo <[email protected]>
> 
> In sctp_process_asconf(), when sctp_make_asconf_ack() fails to allocate
> the ASCONF_ACK chunk due to memory pressure, the code jumps to the
> done label where asoc->peer.addip_serial is unconditionally incremented.
> 
> This leaves the peer's ASCONF (serial N) unacknowledged while the local
> endpoint now expects serial N+1. When the peer retransmits serial N, it
> falls into the serial < addip_serial + 1 branch ,
> which attempts to look up a cached ACK for serial N. No cached ACK
> exists since the allocation failed, so the retransmission is silently
> discarded. The peer eventually times out and ABORTs the association.
> 
> [...]

Here is the summary with links:
  - [net,v2] sctp: fix addip_serial increment on ASCONF_ACK allocation failure
    https://git.kernel.org/netdev/net/c/aa2e13ae8d3c

You are awesome, thank you!
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