mirror of
https://github.com/tailscale/tailscale.git
synced 2025-02-27 18:57:35 +00:00
1cd4e11b26
We were crashing on in initPeerAPIListener when called from authReconfig when b.netMap is nil. But authReconfig already returns before the call to initPeerAPIListener when b.netMap is nil, but it releases the b.mu mutex before calling initPeerAPIListener which reacquires it and assumes it's still nil. The only thing that can be setting it to nil is setNetMapLocked, which is called by ResetForClientDisconnect, Logout/logout, or Start, all of which can happen during an authReconfig. So be more defensive. Fixes #1996 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> (cherry picked from commit ecfb2639cc3a50510d54335d22dc1e3584afcf8a)