Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix clock domain mismatch in clients_still_reclaiming() clients_still_reclaiming() computes a deadline from nn->boot_time (CLOCK_REALTIME, ~1.7 billion) but compares it against ktime_get_boottime_seconds() (CLOCK_BOOTTIME, seconds since boot). The comparison is always false — it would take ~54 years of uptime for BOOTTIME to exceed the REALTIME-derived deadline. This means any client can hold the server in grace indefinitely by sending CLAIM_PREVIOUS OPEN requests, blocking all non-reclaim operations for all other clients. Add boot_time_bt (CLOCK_BOOTTIME) alongside the existing boot_time and use it for the deadline computation. boot_time (CLOCK_REALTIME) is preserved for its cl_boot clientid-nonce role.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 20b7d86f29d39e8ae19bb29c24ffee70dc385ddf before 04c3e4456fe76e8d7c94171009df3165c3262c51; affected 20b7d86f29d39e8ae19bb29c24ffee70dc385ddf before e92e80c5b043108029bc729b30d12c37158fb9cb; affected 20b7d86f29d39e8ae19bb29c24ffee70dc385ddf before f9cec313efb2fd18d962aad738a4892bce806016; affected 20b7d86f29d39e8ae19bb29c24ffee70dc385ddf before 9843649196221152b6e5d138a3ce859bdaae1d96; affected 20b7d86f29d39e8ae19bb29c24ffee70dc385ddf before 09ea3eb9a518565f5bca386e81b993ed8825f5e8 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/04c3e4456fe76e8d7c94171009df3165c3262c51
- https://git.kernel.org/stable/c/e92e80c5b043108029bc729b30d12c37158fb9cb
- https://git.kernel.org/stable/c/f9cec313efb2fd18d962aad738a4892bce806016
- https://git.kernel.org/stable/c/9843649196221152b6e5d138a3ce859bdaae1d96
- https://git.kernel.org/stable/c/09ea3eb9a518565f5bca386e81b993ed8825f5e8
ADP enrichment
No English description supplied.
No references supplied.