linux/drivers/vfio/fsl-mc
Danilo Krummrich 6c8dfb0362 bus: fsl-mc: use generic driver_override infrastructure
When a driver is probed through __driver_attach(), the bus' match()
callback is called without the device lock held, thus accessing the
driver_override field without a lock, which can cause a UAF.

Fix this by using the driver-core driver_override infrastructure taking
care of proper locking internally.

Note that calling match() from __driver_attach() without the device lock
held is intentional. [1]

Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Link: https://lore.kernel.org/driver-core/DGRGTIRHA62X.3RY09D9SOK77P@kernel.org/ [1]
Reported-by: Gui-Dong Han <hanguidong02@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220789
Fixes: 1f86a00c11 ("bus/fsl-mc: add support for 'driver_override' in the mc-bus")
Link: https://patch.msgid.link/20260324005919.2408620-3-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-04-04 20:41:25 +02:00
..
Kconfig vfio/fsl-mc: add myself as maintainer 2026-02-06 15:08:06 -07:00
Makefile vfio/fsl-mc: Add irq infrastructure for fsl-mc devices 2020-10-12 11:33:06 -06:00
vfio_fsl_mc_intr.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
vfio_fsl_mc_private.h vfio: de-extern-ify function prototypes 2022-06-27 09:38:02 -06:00
vfio_fsl_mc.c bus: fsl-mc: use generic driver_override infrastructure 2026-04-04 20:41:25 +02:00