Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvme: add missing SRCU grace period in error path nvme_alloc_ns() error path at out_unlink_ns removes ns from the namespace head siblings list with list_del_rcu(&ns->siblings) but does not wait for SRCU readers before freeing the namespace struct. Multipath code iterates the head->list under srcu_read_lock() in nvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent reader can still hold a reference to ns when kfree(ns) runs. The normal removal path in nvme_ns_remove() correctly calls synchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for in-progress readers. Add the same grace period in the error path.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ed754e5deeb17f4e675c84e4b6c640cc7344e498 before 3868476cd39161f18720582df17a1b621e805b5d; affected ed754e5deeb17f4e675c84e4b6c640cc7344e498 before 0d4735418512ef825176726eaaa8bd6a35f6b46d; affected ed754e5deeb17f4e675c84e4b6c640cc7344e498 before d663944dbad81bb0e3635d7090db4713e6300858; affected ed754e5deeb17f4e675c84e4b6c640cc7344e498 before 76023560d60f10b4f808941163aa2975f1631683; affected ed754e5deeb17f4e675c84e4b6c640cc7344e498 before ef248d5de4469fb6bbaf8dbe0c4c47800080d648 |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3868476cd39161f18720582df17a1b621e805b5d
- https://git.kernel.org/stable/c/0d4735418512ef825176726eaaa8bd6a35f6b46d
- https://git.kernel.org/stable/c/d663944dbad81bb0e3635d7090db4713e6300858
- https://git.kernel.org/stable/c/76023560d60f10b4f808941163aa2975f1631683
- https://git.kernel.org/stable/c/ef248d5de4469fb6bbaf8dbe0c4c47800080d648