| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37859: page_pool: avoid infinite loop to schedule delayed worker |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| page_pool: avoid infinite loop to schedule delayed worker |
| |
| We noticed the kworker in page_pool_release_retry() was waken |
| up repeatedly and infinitely in production because of the |
| buggy driver causing the inflight less than 0 and warning |
| us in page_pool_inflight()[1]. |
| |
| Since the inflight value goes negative, it means we should |
| not expect the whole page_pool to get back to work normally. |
| |
| This patch mitigates the adverse effect by not rescheduling |
| the kworker when detecting the inflight negative in |
| page_pool_release_retry(). |
| |
| [1] |
| [Mon Feb 10 20:36:11 2025] ------------[ cut here ]------------ |
| [Mon Feb 10 20:36:11 2025] Negative(-51446) inflight packet-pages |
| ... |
| [Mon Feb 10 20:36:11 2025] Call Trace: |
| [Mon Feb 10 20:36:11 2025] page_pool_release_retry+0x23/0x70 |
| [Mon Feb 10 20:36:11 2025] process_one_work+0x1b1/0x370 |
| [Mon Feb 10 20:36:11 2025] worker_thread+0x37/0x3a0 |
| [Mon Feb 10 20:36:11 2025] kthread+0x11a/0x140 |
| [Mon Feb 10 20:36:11 2025] ? process_one_work+0x370/0x370 |
| [Mon Feb 10 20:36:11 2025] ? __kthread_cancel_work+0x40/0x40 |
| [Mon Feb 10 20:36:11 2025] ret_from_fork+0x35/0x40 |
| [Mon Feb 10 20:36:11 2025] ---[ end trace ebffe800f33e7e34 ]--- |
| Note: before this patch, the above calltrace would flood the |
| dmesg due to repeated reschedule of release_dw kworker. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37859 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.293 with commit c3c7c57017ce1d4b2d3788c1fc59e7e39026e158 |
| Fixed in 5.10.237 with commit 9f71db4fb82deb889e0bac4a51b34daea7d506a3 |
| Fixed in 5.15.181 with commit 91522aba56e9fcdf64da25ffef9b27f8fad48e0f |
| Fixed in 6.1.135 with commit 90e089a64504982f8d62f223027cb9f903781f78 |
| Fixed in 6.6.88 with commit 95f17738b86fd198924d874a5639bcdc49c7e5b8 |
| Fixed in 6.12.24 with commit 7204335d1991c23fc615ab76f31f175748a578e1 |
| Fixed in 6.13.12 with commit e74e5aa33228c5e2cb4fc80ad103541a7b7805ec |
| Fixed in 6.14.3 with commit 738d1812ec2e395e953258aea912ddd867d11a13 |
| Fixed in 6.15 with commit 43130d02baa137033c25297aaae95fd0edc41654 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-37859 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/core/page_pool.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/c3c7c57017ce1d4b2d3788c1fc59e7e39026e158 |
| https://git.kernel.org/stable/c/9f71db4fb82deb889e0bac4a51b34daea7d506a3 |
| https://git.kernel.org/stable/c/91522aba56e9fcdf64da25ffef9b27f8fad48e0f |
| https://git.kernel.org/stable/c/90e089a64504982f8d62f223027cb9f903781f78 |
| https://git.kernel.org/stable/c/95f17738b86fd198924d874a5639bcdc49c7e5b8 |
| https://git.kernel.org/stable/c/7204335d1991c23fc615ab76f31f175748a578e1 |
| https://git.kernel.org/stable/c/e74e5aa33228c5e2cb4fc80ad103541a7b7805ec |
| https://git.kernel.org/stable/c/738d1812ec2e395e953258aea912ddd867d11a13 |
| https://git.kernel.org/stable/c/43130d02baa137033c25297aaae95fd0edc41654 |
