On Fri, Jan 19, 2018 at 04:10:56PM +0100, Thomas Gleixner wrote:
> Upstream commit 45d55e7bac4028af93f5fa324e69958a0b868e96
>
> Keith reported the following warning:
>
> WARNING: CPU: 28 PID: 1420 at kernel/irq/matrix.c:222 irq_matrix_remove_managed+0x10f/0x120
> x86_vector_free_irqs+0xa1/0x180
> x86_vector_alloc_irqs+0x1e4/0x3a0
> msi_domain_alloc+0x62/0x130
>
> The reason for this is that if the vector allocation fails the error
> handling code tries to free the failed vector as well, which causes the
> above imbalance warning to trigger.
>
> Adjust the error path to handle this correctly.
>
> Fixes: b5dc8e6c21e7 ("x86/irq: Use hierarchical irqdomain to manage CPU interrupt vectors")
> Reported-by: Keith Busch <keith.busch@xxxxxxxxx>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Tested-by: Keith Busch <keith.busch@xxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801161217300.1823@nanos
Thanks for the backports, now queued up.
greg k-h