Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvme: remove stale namespaces by NSID range during scan nvme_scan_ns_list() drops the stale namespaces in each gap in the reported NSID list one NSID at a time. Every iteration calls nvme_find_get_ns() to look the namespace up and removes it if it is present. The loop runs once per NSID in the gap rather than once per namespace actually present. NSIDs are 32-bit, so a target with a sparse NSID space can make a single gap spin the loop billions of times with nothing to remove. watchdog: BUG: soft lockup - CPU#4 stuck for 26s! Workqueue: nvme-wq nvme_scan_work [nvme_core] RIP: 0010:__srcu_read_unlock+0xb/0x20 Call Trace: nvme_find_get_ns+0x7d/0xb0 [nvme_core] nvme_scan_ns_list+0xe8/0x280 [nvme_core] nvme_scan_work+0x18a/0x280 [nvme_core] process_one_work+0x197/0x380 worker_thread+0x2fe/0x410 kthread+0xe0/0x100 Rename nvme_remove_invalid_namespaces() to nvme_remove_nsid_range() and give it an open (start, end) NSID range. ctrl->namespaces is sorted by NSID, so the whole gap is dropped in a single walk that stops once end is reached. This bounds the work by the namespaces that are present instead of by the size of the gap.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 before e6a94b2c4c80a38002346ce915a9b9a3d478a3e6; affected 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 before c84ad7407fb16b92d9b7a649cc304a9cf3757897; affected 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 before f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4; affected 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 before 52200fc41a79da430ccf7c126ed837535b087ea2; affected 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 before 4ed7f3d7d435bf5b63da2814dc9270f5ba896011 |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 6.6.160 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e6a94b2c4c80a38002346ce915a9b9a3d478a3e6
- https://git.kernel.org/stable/c/c84ad7407fb16b92d9b7a649cc304a9cf3757897
- https://git.kernel.org/stable/c/f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4
- https://git.kernel.org/stable/c/52200fc41a79da430ccf7c126ed837535b087ea2
- https://git.kernel.org/stable/c/4ed7f3d7d435bf5b63da2814dc9270f5ba896011