[Bug 220061] [REGRESSION, BISECTED] Multiple Bluetooth devices cannot be paired under Linux 6.14.4

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220061

--- Comment #16 from Artem S. Tashkinov (aros@gmx.com) ---
Strangely I don't see anything relevant queued for the stable.(In reply to Luiz
Von Dentz from comment #12)
> (In reply to Sandro Forster from comment #11)
> > I've tested v2 of the fix with a DualShock 4 v1 and v2 (the firmware is
> > probably the same, but just to be sure). Both had the same behavior.
> > Connecting failed on the first attempt, but every following connection
> > succeeded. When bluetooth is restarted, the first connection fails again.
> > Here is the output of btmon for a unsuccessful and successful connection
> > attempt. I've attached to logs above.
> 
> I think that is because when you restart the daemon the link keys are
> reloaded and then their key size is lost in the process (for Classic, for LE
> the key size seem to be stored by the daemon), anyway I just spin a v3 to
> address this so if we don't know the key encryption size we use
> hdev->min_enc_key_size to satisfy l2cap_check_enc_key_size:
> 
> https://patchwork.kernel.org/project/bluetooth/patch/20250502202052.2802441-
> 1-luiz.dentz@gmail.com/

Strangely I don't see anything relevant queued for the stable.

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