Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: smb/server: abort initialization when proc setup fails ksmbd_server_init() calls ksmbd_proc_init() before creating the remaining proc entries and server subsystems. ksmbd_proc_init() tears down partial state on a procfs or percpu_counter allocation failure, but returns void, so ksmbd_server_init() continues as if the counters were usable. Once userspace starts the server, server_ctrl_handle_init() calls ksmbd_proc_reset(), which reaches percpu_counter_set() with a NULL per-CPU counters pointer on SMP systems. The later ksmbd_proc_create() calls also receive a NULL parent and may create entries in the /proc root; ksmbd_proc_cleanup() cannot remove those entries because ksmbd_proc_fs is NULL.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b38f99c1217ae04753340f0fdcd8f35bf56841dc before fb4ba2bdfc1de8866e7c8e00df99f4b03ff42f09; affected b38f99c1217ae04753340f0fdcd8f35bf56841dc before db97f3763727d652112ae70038d4e17b3ce277bb |
| Linux / Linux | affected 7.0; unaffected 0 before 7.0; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.