ARM: ensure interrupts are enabled in __do_user_fault()

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__do_user_fault() may be called from fault handling paths where the
interrupts are enabled or disabled. E.g. do_page_fault() calls this
with interrupts enabled, whereas do_sect_fault()->do_bad_area()
will call this with interrupts disabled. Since this is a userspace
fault, we know that interrupts were enabled in the parent context,
so call local_irq_enable() here to give a consistent interrupt state.

This is necessary for force_sig_info() when PREEMPT_RT is enabled.

Reported-by: Yadi.hu <yadi.hu@windriver.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

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Russell King (Oracle) 2025-12-05 12:17:00 +00:00

parent 05f7e89ab9

commit 59e4f3b45b

1 changed files with 5 additions and 1 deletions

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arch/arm/mm/fault.c

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