Frank Rowand 29acfb6559 of: unittest: kmemleak in duplicate property update ...

kmemleak reports several memory leaks from devicetree unittest.
This is the fix for problem 5 of 5.

When overlay 'overlay_bad_add_dup_prop' is applied, the apply code
properly detects that a memory leak will occur if the overlay is removed
since the duplicate property is located in a base devicetree node and
reports via printk():

  OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/motor-1/rpm_avail
  OF: overlay: WARNING: memory leak will occur if overlay removed, property: /testcase-data-2/substation@100/motor-1/rpm_avail

The overlay is removed when the apply code detects multiple changesets
modifying the same property.  This is reported via printk():

  OF: overlay: ERROR: multiple fragments add, update, and/or delete property /testcase-data-2/substation@100/motor-1/rpm_avail

As a result of this error, the overlay is removed resulting in the
expected memory leak.

Add another device node level to the overlay so that the duplicate
property is located in a node added by the overlay, thus no memory
leak will occur when the overlay is removed.

Thus users of kmemleak will not have to debug this leak in the future.

Fixes: 2fe0e8769df9 ("of: overlay: check prevents multiple fragments touching same property")
Reported-by: Erhard F. <erhard_f@mailbox.org>
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>

2020-04-17 08:31:34 -05:00

..

unittest-data

of: unittest: kmemleak in duplicate property update

2020-04-17 08:31:34 -05:00

address.c

of/address: Support multiple 'dma-ranges' entries

2020-02-14 15:27:08 -06:00

base.c

ARM: SoC-related driver updates

2020-02-08 14:04:19 -08:00

device.c

treewide: remove redundant IS_ERR() before error code check

2020-02-04 03:05:27 +00:00

dynamic.c

of: Rework and simplify phandle cache to use a fixed size

2019-12-24 14:17:52 -07:00

fdt_address.c

of: Use SPDX license tag for DT files

2018-01-08 08:22:45 -06:00

fdt.c

Devicetree updates for v5.5:

2019-12-02 11:41:35 -08:00

irq.c

of: irq: fix a trivial typo in a doc comment

2019-08-14 20:12:16 -06:00

Kconfig

of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc

2020-01-28 08:26:20 -06:00

kobj.c

of: overlay: add missing of_node_get() in __of_attach_node_sysfs

2018-11-08 22:10:53 -08:00

Makefile

PCI: Move OF-related PCI functions into PCI core

2018-01-17 17:36:39 -06:00

of_mdio.c

drivers/of/of_mdio.c:fix of_mdiobus_register()

2020-03-03 19:01:51 -08:00

of_net.c

net: of_get_phy_mode: Change API to solve int/unit warnings

2019-11-04 11:21:25 -08:00

of_numa.c

of, numa: Validate some distance map rules

2018-11-08 12:44:34 -06:00

of_private.h

of: of_private.h: Replace zero-length array with flexible-array member

2020-03-31 09:03:34 -06:00

of_reserved_mem.c

of: of_reserved_mem: Increase limit on number of reserved regions

2020-02-25 15:08:28 -06:00

overlay.c

of: overlay: kmemleak in dup_and_fixup_symbol_prop()

2020-04-17 08:31:34 -05:00

pdt.c

of: Remove struct device_node.type pointer

2019-01-10 16:24:44 -06:00

platform.c

of/platform: Unconditionally pause/resume sync state during kernel init

2019-12-12 18:39:52 -06:00

property.c

Devicetree updates for v5.7:

2020-04-02 17:32:52 -07:00

resolver.c

of: overlay: log the error cause on resolver failure

2020-03-02 11:32:44 -06:00

unittest.c

of: unittest: kmemleak in duplicate property update

2020-04-17 08:31:34 -05:00