Description: USB: iowarrior: fix use-after-free on disconnect
References:
 http://www.openwall.com/lists/oss-security/2019/12/03/4
Notes:
 carnil> The fix c468a8aa790e ("usb: iowarrior: fix deadlock on
 carnil> disconnect") in 5.3-rc4 (and backported to 5.2.9, 4.19.67 and
 carnil> 4.9.190) introduced the issue.
Bugs:
upstream: released (5.4-rc3) [edc4746f253d907d048de680a621e121517f484b]
4.19-upstream-stable: released (4.19.80) [2fdcf7e19bdefc683da824264c0898af39bf8d50]
4.9-upstream-stable: released (4.9.197) [323f425a7618fdb0b961dec2c58685fa32eafa1b]
3.16-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.3.7-1)
4.19-buster-security: released (4.19.87-1)
4.9-stretch-security: N/A "Vulnerable code not yet present in released version"
3.16-jessie-security: N/A "Vulnerable code not present"