opnsense-src/sys/ofed
Hans Petter Selasky 1ecd211915 ibcore: Fix sysfs registration error flow
The kernel commit cited below restructured ib device management
so that the device kobject is initialized in ib_alloc_device.

As part of the restructuring, the kobject is now initialized in
procedure ib_alloc_device, and is later added to the device hierarchy
in the ib_register_device call stack, in procedure
ib_device_register_sysfs (which calls device_add).

However, in the ib_device_register_sysfs error flow, if an error
occurs following the call to device_add, the cleanup procedure
device_unregister is called. This call results in the device object
being deleted -- which results in various use-after-free crashes.

The correct cleanup call is device_del -- which undoes device_add
without deleting the device object.

The device object will then (correctly) be deleted in the
ib_register_device caller's error cleanup flow, when the caller invokes
ib_dealloc_device.

Linux commit:
b312be3d87e4c80872cbea869e569175c5eb0f9a

PR:		264472
Sponsored by:	NVIDIA Networking

(cherry picked from commit 55d1833671)
2022-06-27 10:14:49 +02:00
..
drivers/infiniband ibcore: Fix sysfs registration error flow 2022-06-27 10:14:49 +02:00
include ibcore: Add support for NDR link speed. 2022-03-03 15:28:53 +01:00