Georgi Djakov 802e113cf1 drivers/base/memory: set mem->altmap after successful device registration ...

[ Upstream commit a2b8d7827f ]

If __add_memory_block() fails at xa_store() (under memory pressure for
example), device_unregister() is called, which eventually triggers
memory_block_release() with mem->altmap still set, causing a
WARN_ON(mem->altmap).  This was triggered by modifying virtio-mem driver.

Fix this by delaying the assignment of mem->altmap until after
__add_memory_block() has succeeded.

Link: https://lore.kernel.org/20260514092657.3057141-1-georgi.djakov@oss.qualcomm.com
Fixes: 1a8c64e110 ("mm/memory_hotplug: embed vmem_altmap details in memory block")
Signed-off-by: Georgi Djakov <georgi.djakov@oss.qualcomm.com>
Acked-by: Oscar Salvador (SUSE) <osalvador@kernel.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Richard Cheng <icheng@nvidia.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Georgi Djakov <djakov@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-07-04 13:42:27 +02:00

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firmware_loader

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power

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2026-05-23 13:03:34 +02:00

regmap

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2026-04-02 13:07:21 +02:00

test

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arch_numa.c

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arch_topology.c

arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()

2025-10-29 14:07:02 +01:00

attribute_container.c

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auxiliary.c

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base.h

Revert "driver core: enforce device_lock for driver_match_device()"

2026-02-16 17:08:02 +01:00

bus.c

driver core: reject devices with unregistered buses

2026-06-19 13:39:37 +02:00

cacheinfo.c

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class.c

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component.c

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container.c

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core.c

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2026-06-01 17:43:04 +02:00

cpu.c

x86/vmscape: Enable the mitigation

2025-09-11 17:20:27 +02:00

dd.c

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2026-06-01 17:43:04 +02:00

devcoredump.c

devcoredump: Fix circular locking dependency with devcd->mutex.

2025-10-29 14:07:05 +01:00

devres.c

devres: fix missing node debug info in devm_krealloc()

2026-05-23 13:03:05 +02:00

devtmpfs.c

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driver.c

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firmware.c

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hypervisor.c

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init.c

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isa.c

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Kconfig

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Makefile

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map.c

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memory.c

drivers/base/memory: set mem->altmap after successful device registration

2026-07-04 13:42:27 +02:00

module.c

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node.c

base/node / ACPI: Enumerate node access class for 'struct access_coordinate'

2025-11-24 10:30:04 +01:00

physical_location.c

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physical_location.h

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pinctrl.c

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platform-msi.c

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platform.c

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property.c

device property: Allow secondary lookup in fwnode_get_next_child_node()

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soc.c

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swnode.c

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2025-06-27 11:08:56 +01:00

syscore.c

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topology.c

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trace.c

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trace.h

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transport_class.c

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