CVE-2026-98544

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

bna: prevent IOC timer rearm during teardown

bna: prevent IOC timer rearm during teardown

bnad_pci_remove() and the probe disable_ioceth path call

timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for

iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after

free_netdev() has freed the struct bnad.

Deleting iocpf_timer last does not fix this. sem_timer and

iocpf_timer rearm each other: bnad_iocpf_sem_timeout() can arm

iocpf_timer, and bnad_iocpf_timeout() arms sem_timer from

bfa_ioc_hw_sem_get() when the semaphore is busy.

timer_delete_sync() only waits out its own callback.

bnad_ioceth_disable() can time out and leave that callback live.

Shut all four IOC timers down with timer_shutdown_sync() on both

paths, so a later mod_timer() is ignored.

This issue was identified during our ongoing static-analysis research

while reviewing kernel code.