In the Linux kernel, the following vulnerability has been resolved: net: usb: lan78xx: fix WARN in _netifnapidellocked on disconnect Remove redundant netifnapidel() call from disconnect path. A WARN may be triggered in _netifnapidellocked() during USB device disconnect: WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 _netifnapidellocked+0x2b4/0x350 This happens because netifnapidel() is called in the disconnect path while NAPI is still enabled. However, it is not necessary to call netifnapidel() explicitly, since unregisternetdev() will handle NAPI teardown automatically and safely. Removing the redundant call avoids triggering the warning. Full trace: lan78xx 1-1:1.0 enu1: Failed to read register index 0x000000c4. ret = -ENODEV lan78xx 1-1:1.0 enu1: Failed to set MAC down with error -ENODEV lan78xx 1-1:1.0 enu1: Link is Down lan78xx 1-1:1.0 enu1: Failed to read register index 0x00000120. ret = -ENODEV ------------[ cut here ]------------ WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 _netifnapidellocked+0x2b4/0x350 Modules linked in: flexcan candev fuse CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc2-00624-ge926949dab03 #9 PREEMPT Hardware name: SKOV IMX8MP CPU revC - bd500 (DT) Workqueue: usbhubwq hubevent pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : _netifnapidellocked+0x2b4/0x350 lr : _netifnapidellocked+0x7c/0x350 sp : ffffffc085b673c0 x29: ffffffc085b673c0 x28: ffffff800b7f2000 x27: ffffff800b7f20d8 x26: ffffff80110bcf58 x25: ffffff80110bd978 x24: 1ffffff0022179eb x23: ffffff80110bc000 x22: ffffff800b7f5000 x21: ffffff80110bc000 x20: ffffff80110bcf38 x19: ffffff80110bcf28 x18: dfffffc000000000 x17: ffffffc081578940 x16: ffffffc08284cee0 x15: 0000000000000028 x14: 0000000000000006 x13: 0000000000040000 x12: ffffffb0022179e8 x11: 1ffffff0022179e7 x10: ffffffb0022179e7 x9 : dfffffc000000000 x8 : 0000004ffdde8619 x7 : ffffff80110bcf3f x6 : 0000000000000001 x5 : ffffff80110bcf38 x4 : ffffff80110bcf38 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 1ffffff0022179e7 x0 : 0000000000000000 Call trace: _netifnapidellocked+0x2b4/0x350 (P) lan78xxdisconnect+0xf4/0x360 usbunbindinterface+0x158/0x718 deviceremove+0x100/0x150 devicereleasedriverinternal+0x308/0x478 devicereleasedriver+0x1c/0x30 busremovedevice+0x1a8/0x368 devicedel+0x2e0/0x7b0 usbdisabledevice+0x244/0x540 usbdisconnect+0x220/0x758 hubevent+0x105c/0x35e0 processonework+0x760/0x17b0 workerthread+0x768/0xce8 kthread+0x3bc/0x690 retfromfork+0x10/0x20 irq event stamp: 211604 hardirqs last enabled at (211603): [<ffffffc0828cc9ec>] rawspinunlockirqrestore+0x84/0x98 hardirqs last disabled at (211604): [<ffffffc0828a9a84>] el1dbg+0x24/0x80 softirqs last enabled at (211296): [<ffffffc080095f10>] handlesoftirqs+0x820/0xbc8 softirqs last disabled at (210993): [<ffffffc080010288>] _dosoftirq+0x18/0x20 ---[ end trace 0000000000000000 ]--- lan78xx 1-1:1.0 enu1: failed to kill vid 0081/0