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| author |   Frank Rowand <frank.rowand@sony.com> | 2021-04-08 15:45:08 -0500 |
|---|---|---|
| committer |   Rob Herring <robh@kernel.org> | 2021-04-08 16:38:47 -0500 |
| commit | 48d499bd89191b359a6dbe44d32107e3021571c2 (patch) | |
| tree | 2fa58efa7eeb0a6367f6efbcd4b5f4438a1fdfc0 /drivers/of/of_private.h | |
| parent | of: properly check for error returned by fdt_get_name() (diff) | |
| download | linux-dev-48d499bd89191b359a6dbe44d32107e3021571c2.tar.xz linux-dev-48d499bd89191b359a6dbe44d32107e3021571c2.zip | |
of: unittest: overlay: ensure proper alignment of copied FDT
The Devicetree standard specifies an 8 byte alignment of the FDT.
Code in libfdt expects this alignment for an FDT image in memory.
kmemdup() returns 4 byte alignment on openrisc. Replace kmemdup()
with kmalloc(), align pointer, memcpy() to get proper alignment.
The 4 byte alignment exposed a related bug which triggered a crash
on openrisc with:
commit 79edff12060f ("scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9")
as reported in:
https://lore.kernel.org/lkml/20210327224116.69309-1-linux@roeck-us.net/
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Link: https://lore.kernel.org/r/20210408204508.2276230-1-frowand.list@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/of_private.h')
| -rw-r--r-- | drivers/of/of_private.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index d9e6a324de0a..d717efbd637d 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -8,6 +8,8 @@ * Copyright (C) 1996-2005 Paul Mackerras. */ +#define FDT_ALIGN_SIZE 8 + /** * struct alias_prop - Alias property in 'aliases' node * @link: List node to link the structure in aliases_lookup list |