Description: ALSA: line6: Assure canceling delayed work at disconnection
References:
 https://syzkaller.appspot.com/bug?id=0c1e517c657d3de2361cb0cc2d3a8663c25039a7
Notes:
 bwh> Introduced in 5.2-rc1 by commit 7f84ff68be05 "ALSA: line6: toneport: Fix
 bwh> broken usage of timer for delayed execution".  This was backported
 bwh> into 4.19.45.
Bugs:
upstream: released (5.2-rc3) [0b074ab7fc0d575247b9cc9f93bb7e007ca38840]
4.19-upstream-stable: released (4.19.49) [eb2eeec920fb1b9b6faf8ea340f6295a2d03602b]
4.9-upstream-stable: N/A "Vulnerability introduced later"
3.16-upstream-stable: N/A "Vulnerability introduced later"
sid: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerability introduced later"
4.9-stretch-security: N/A "Vulnerability introduced later"
3.16-jessie-security: N/A "Vulnerability introduced later"