title: Input: powermate - fix use-after-free in powermate_config_complete
description: In the Linux kernel, the following vulnerability has been resolved:
Input: powermate - fix use-after-free in powermate_config_complete
syzbot has found a use-after-free bug [1] in the powermate driver. This
happens when the device is disconnected, which leads to a memory free from
the powermate_device struct.  When an asynchronous control message
completes after the kfree and its callback is invoked, the lock does not
exist anymore and hence the bug.
Use usb_kill_urb() on pm->config to cancel any in-progress requests upon
device disconnection.
[1] https://syzkaller.appspot.com/bug?extid=0434ac83f907a1dbdd1e
affected:
{
product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: 1da177e4c3f4, lessThan: 8677575c4f39, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 67cace72606b, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 5aa514100aaf, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: cd2fbfd8b922, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 6a4a39638640, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 2efe67c581a2, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: e528b1b9d607, status: affected, versionType: git
version: 1da177e4c3f4, lessThan: 5c15c60e7be6, status: affected, versionType: git
}
{
product: Linux
vendor: Linux
defaultStatus: affected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: 4.14.328, lessThanOrEqual: 4.14.*, status: unaffected, versionType: custom
version: 4.19.297, lessThanOrEqual: 4.19.*, status: unaffected, versionType: custom
version: 5.4.259, lessThanOrEqual: 5.4.*, status: unaffected, versionType: custom
version: 5.10.199, lessThanOrEqual: 5.10.*, status: unaffected, versionType: custom
version: 5.15.136, lessThanOrEqual: 5.15.*, status: unaffected, versionType: custom
version: 6.1.59, lessThanOrEqual: 6.1.*, status: unaffected, versionType: custom
version: 6.5.8, lessThanOrEqual: 6.5.*, status: unaffected, versionType: custom
version: 6.6, lessThanOrEqual: *, status: unaffected, versionType: original_commit_for_fix
}
