6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tomas Krcka <krckatom@xxxxxxxxx>
commit 35cb2c6ce7da545f3b5cb1e6473ad7c3a6f08310 upstream.
The following call-chain leads to enabling interrupts in a nested interrupt
disabled section:
irq_set_vcpu_affinity()
irq_get_desc_lock()
raw_spin_lock_irqsave() <--- Disable interrupts
its_irq_set_vcpu_affinity()
guard(raw_spinlock_irq) <--- Enables interrupts when leaving the guard()
irq_put_desc_unlock() <--- Warns because interrupts are enabled
This was broken in commit b97e8a2f7130, which replaced the original
raw_spin_[un]lock() pair with guard(raw_spinlock_irq).
Fix the issue by using guard(raw_spinlock).
[ tglx: Massaged change log ]
Fixes: b97e8a2f7130 ("irqchip/gic-v3-its: Fix potential race condition in its_vlpi_prop_update()")
Signed-off-by: Tomas Krcka <krckatom@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/all/20241230150825.62894-1-krckatom@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/irqchip/irq-gic-v3-its.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1970,7 +1970,7 @@ static int its_irq_set_vcpu_affinity(str
if (!is_v4(its_dev->its))
return -EINVAL;
- guard(raw_spinlock_irq)(&its_dev->event_map.vlpi_lock);
+ guard(raw_spinlock)(&its_dev->event_map.vlpi_lock);
/* Unmap request? */
if (!info)
