جزئیات آسیب‌پذیری

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.

• https://git.kernel.org/stable/c/7ca44a63d9a554ba7ad05b06d88746eab08b760e
• https://git.kernel.org/stable/c/2c9efc6b692a153643d0f204b3c3632cb6b5761e
• https://git.kernel.org/stable/c/a22ee3a2cadef44f2edeb909ae36bd72450a3a35
• 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