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control/ts2021: fix data race during concurrent Close and conn ending

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Fixes tailscale/corp#33125

Change-Id: I9911f5059d5ebe42ecf7db9becb2326cca240765
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-10-08 07:50:56 -07:00
committed by Brad Fitzpatrick
parent 109cb50d5f
commit 9556a0c6da
1 changed files with 1 additions and 0 deletions
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control/ts2021/client.go
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@@ -180,6 +180,7 @@ func (nc *Client) Close() error {
nc.mu.Lock() nc.mu.Lock()
live := nc.connPool live := nc.connPool
nc.closed = true nc.closed = true
nc.connPool = nil // stop noteConnClosed from mutating it as we loop over it (in live) below
nc.mu.Unlock() nc.mu.Unlock()
for _, c := range live { for _, c := range live {