CVE-2024-26892

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7921e: fix use-after-free in free_irq()

From commit a304e1b82808 ("[PATCH] Debug shared irqs"), there is a test to make sure the shared irq handler should be able to handle the unexpected event after deregistration. For this case, let's apply MT76_REMOVED flag to indicate the device was removed and do not run into the resource access anymore.

BUG: KASAN: use-after-free in mt7921irqhandler+0xd8/0x100 [mt7921e] Read of size 8 at addr ffff88824a7d3b78 by task rmmod/11115 CPU: 28 PID: 11115 Comm: rmmod Tainted: G W L 5.17.0 #10 Hardware name: Micro-Star International Co., Ltd. MS-7D73/MPG B650I EDGE WIFI (MS-7D73), BIOS 1.81 01/05/2024 Call Trace: <TASK> dumpstacklvl+0x6f/0xa0 printaddressdescription.constprop.0+0x1f/0x190 ? mt7921irqhandler+0xd8/0x100 [mt7921e] ? mt7921irqhandler+0xd8/0x100 [mt7921e] kasanreport.cold+0x7f/0x11b ? mt7921irqhandler+0xd8/0x100 [mt7921e] mt7921irqhandler+0xd8/0x100 [mt7921e] freeirq+0x627/0xaa0 devmfreeirq+0x94/0xd0 ? devmrequestanycontextirq+0x160/0x160 ? kobjectput+0x18d/0x4a0 mt7921pciremove+0x153/0x190 [mt7921e] pcideviceremove+0xa2/0x1d0 _devicereleasedriver+0x346/0x6e0 driverdetach+0x1ef/0x2c0 busremovedriver+0xe7/0x2d0 ? _checkobjectsize+0x57/0x310 pciunregisterdriver+0x26/0x250 _dosysdeletemodule+0x307/0x510 ? freemodule+0x6a0/0x6a0 ? fpregsassertstateconsistent+0x4b/0xb0 ? rcureadlockschedheld+0x10/0x70 ? syscallenterfromusermode+0x20/0x70 ? tracehardirqson+0x1c/0x130 dosyscall64+0x5c/0x80 ? tracehardirqsonprepare+0x72/0x160 ? dosyscall64+0x68/0x80 ? tracehardirqsonprepare+0x72/0x160 entrySYSCALL64afterhwframe+0x44/0xae