linux/drivers/xen/events
Thomas Gleixner c330fb1ddc XEN uses irqdesc::irq_data_common::handler_data to store a per interrupt
XEN data pointer which contains XEN specific information.

handler data is meant for interrupt handlers and not for storing irq chip
specific information as some devices require handler data to store internal
per interrupt information, e.g. pinctrl/GPIO chained interrupt handlers.

This obviously creates a conflict of interests and crashes the machine
because the XEN pointer is overwritten by the driver pointer.

As the XEN data is not handler specific it should be stored in
irqdesc::irq_data::chip_data instead.

A simple sed s/irq_[sg]et_handler_data/irq_[sg]et_chip_data/ cures that.

Cc: stable@vger.kernel.org
Reported-by: Roman Shaposhnik <roman@zededa.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Roman Shaposhnik <roman@zededa.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/87lfi2yckt.fsf@nanos.tec.linutronix.de
Signed-off-by: Juergen Gross <jgross@suse.com>
2020-08-27 08:32:36 +02:00
..
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
events_2l.c xen: Use evtchn_type_t as a type for event channels 2020-04-07 12:12:54 +02:00
events_base.c XEN uses irqdesc::irq_data_common::handler_data to store a per interrupt 2020-08-27 08:32:36 +02:00
events_fifo.c xen: Use evtchn_type_t as a type for event channels 2020-04-07 12:12:54 +02:00
events_internal.h xen: Use evtchn_type_t as a type for event channels 2020-04-07 12:12:54 +02:00