CVE-2022-49493

There is a logic error when removing rt5645 device as the function rt5645i2cremove() first cancel the &rt5645->jackdetectwork and delete the &rt5645->btnchecktimer latter. However, since the timer handler rt5645btncheckcallback() will re-queue the jackdetect_work, this cleanup order is buggy.

That is, once the deltimersync in rt5645i2cremove is concurrently run with the rt5645btncheckcallback, the canceled jackdetect_work will be rescheduled again, leading to possible use-after-free.

This patch fix the issue by placing the deltimersync function before the canceldelayedwork_sync.

References

Affected packages

Debian:11 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.10.127-1

Affected versions

5.*

5.10.46-4

5.10.46-5

5.10.70-1~bpo10+1

5.10.70-1

5.10.84-1

5.10.92-1~bpo10+1

5.10.92-1

5.10.92-2

5.10.103-1~bpo10+1

5.10.103-1

5.10.106-1

5.10.113-1

5.10.120-1~bpo10+1

5.10.120-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.18.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name: linux
Purl: pkg:deb/debian/linux?arch=source

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

5.18.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}