[Bug 219458] bluetooth connection fails after L2CAP: Fix uaf in l2cap_connect patch

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https://bugzilla.kernel.org/show_bug.cgi?id=219458

--- Comment #6 from Luiz Von Dentz (luiz.dentz@xxxxxxxxx) ---
(In reply to Giuseppe Ghibò from comment #4)
> btmon output added. As you can see in the working case the behaviour
> diverges from packet #16 (in the first case, working) and after packet #94
> in the "not working" case, both calls ACL Data RX with L2CAP: Information
> Request:, but in the working case it's followed by HCI Event: Read Remote...
> and other commands, while in the not working case it's immediately followed
> by "MGMT Event: Device Connected", like if something was truncated.
> 
> [working]
> > ACL Data RX: Handle 256 flags 0x02 dlen 10              #16 [hci0]
> 413.700565
>       L2CAP: Information Request (0x0a) ident 1 len 2
>         Type: Extended features supported (0x0002)
> > HCI Event: Read Remote Extended Featu.. (0x23) plen 13  #17 [hci0]
> 413.700588
> 
> 
> [not working]
> > ACL Data RX: Handle 256 flags 0x02 dlen 10               #94 [hci0]
> 20.205711
>       L2CAP: Information Request (0x0a) ident 7 len 2
>         Type: Extended features supported (0x0002)
> @ MGMT Event: Device Connected (0x000b) plen 13       {0x0001} [hci0]
> 20.205764
>         BR/EDR Address: AA:BB:CC:DD:EE:FF (Company)

Any chance to check with the patch above?

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