Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ksmbd: safely discard unregistered deferred locks When vfs_lock_file() defers a lock, smb2_lock() puts its ksmbd_lock on rollback_list before allocating and registering the asynchronous work. If either operation fails, rollback assumes that smb_lock->conn is initialized and dereferences NULL. The deferred file_lock also remains linked into the VFS blocked-lock state while it is freed. Keep the lock off rollback_list until async setup succeeds. On setup failures, explicitly unblock and wake the deferred lock before freeing it and its ksmbd wrapper.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before ecdcfa15b3d799476c685cecd433ebefc93015c8; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 77413400f083a959724de6f36348c9677ef9873a; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 52b91bc5253bb83665f3ea70565d0b2487dae643; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before d09af9a35ff7b77a950b507133d9092aadbfeff4; affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 054bcca4cd9f00719b01f7108b51a2168fb94f15 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ecdcfa15b3d799476c685cecd433ebefc93015c8
- https://git.kernel.org/stable/c/77413400f083a959724de6f36348c9677ef9873a
- https://git.kernel.org/stable/c/52b91bc5253bb83665f3ea70565d0b2487dae643
- https://git.kernel.org/stable/c/d09af9a35ff7b77a950b507133d9092aadbfeff4
- https://git.kernel.org/stable/c/054bcca4cd9f00719b01f7108b51a2168fb94f15