CVE-2025-38009

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: mt76: disable napi on driver removal<br /> <br /> A warning on driver removal started occurring after commit 9dd05df8403b<br /> ("net: warn if NAPI instance wasn&amp;#39;t shut down"). Disable tx napi before<br /> deleting it in mt76_dma_cleanup().<br /> <br /> WARNING: CPU: 4 PID: 18828 at net/core/dev.c:7288 __netif_napi_del_locked+0xf0/0x100<br /> CPU: 4 UID: 0 PID: 18828 Comm: modprobe Not tainted 6.15.0-rc4 #4 PREEMPT(lazy)<br /> Hardware name: ASUS System Product Name/PRIME X670E-PRO WIFI, BIOS 3035 09/05/2024<br /> RIP: 0010:__netif_napi_del_locked+0xf0/0x100<br /> Call Trace:<br /> <br /> mt76_dma_cleanup+0x54/0x2f0 [mt76]<br /> mt7921_pci_remove+0xd5/0x190 [mt7921e]<br /> pci_device_remove+0x47/0xc0<br /> device_release_driver_internal+0x19e/0x200<br /> driver_detach+0x48/0x90<br /> bus_remove_driver+0x6d/0xf0<br /> pci_unregister_driver+0x2e/0xb0<br /> __do_sys_delete_module.isra.0+0x197/0x2e0<br /> do_syscall_64+0x7b/0x160<br /> entry_SYSCALL_64_after_hwframe+0x76/0x7e<br /> <br /> Tested with mt7921e but the same pattern can be actually applied to other<br /> mt76 drivers calling mt76_dma_cleanup() during removal. Tx napi is enabled<br /> in their *_dma_init() functions and only toggled off and on again inside<br /> their suspend/resume/reset paths. So it should be okay to disable tx<br /> napi in such a generic way.<br /> <br /> Found by Linux Verification Center (linuxtesting.org).