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Message-ID: <2025050922-CVE-2025-37859-cf97@gregkh> Date: Fri, 9 May 2025 08:42:37 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2025-37859: page_pool: avoid infinite loop to schedule delayed worker From: Greg Kroah-Hartman <gregkh@...nel.org> 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-rc1 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
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