The branch stable/13 has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=1ecd211915ff0dd1989db9e8052794f1ea872772
commit 1ecd211915ff0dd1989db9e8052794f1ea872772 Author: Hans Petter Selasky <[email protected]> AuthorDate: 2022-06-21 09:07:06 +0000 Commit: Hans Petter Selasky <[email protected]> CommitDate: 2022-06-27 08:14:49 +0000 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 55d183367104e3efcdaa936f65e4f82303871271) --- sys/ofed/drivers/infiniband/core/ib_sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/ofed/drivers/infiniband/core/ib_sysfs.c b/sys/ofed/drivers/infiniband/core/ib_sysfs.c index 4cbb69ad899b..63f6c2641b83 100644 --- a/sys/ofed/drivers/infiniband/core/ib_sysfs.c +++ b/sys/ofed/drivers/infiniband/core/ib_sysfs.c @@ -1366,7 +1366,7 @@ err_put: free_port_list_attributes(device); err_unregister: - device_unregister(class_dev); + device_del(class_dev); err: return ret;
