Hello:

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

On Wed,  3 Jun 2026 14:11:44 -0400 you wrote:

sctp_stream_update() is only invoked when the association is moved into
COOKIE_WAIT during association setup/reconfiguration. In this path, the
outbound stream scheduler state (stream->out_curr) is expected to be
clean, since no user data should have been transmitted yet unless the
state machine has already partially progressed.

However, a corner case exists in sctp_sf_do_5_2_6_stale(): when a
Stale Cookie ERROR is received, the association is rolled back from
COOKIE_ECHOED to COOKIE_WAIT. In this scenario, user data may already
have been queued and even bundled with the COOKIE-ECHO chunk.

[...]

Here is the summary with links:
  - [net] sctp: purge outqueue on stale COOKIE-ECHO handling
    https://git.kernel.org/netdev/net/c/e374b22e9b07

You are awesome, thank you!
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