diff options
| author | Luck, Tony <tony.luck@intel.com> | 2013-11-01 13:59:52 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-11-03 10:40:12 +0100 |
| commit | 0841c04d65937ad2808f59c43cb54a92473c8f0e (patch) | |
| tree | 92159fbcb7821de9ee55f7220e18b2117867ecb3 /drivers | |
| parent | d61ec845e2a2e2763aad3ee3024003ce1bb832cf (diff) | |
| download | linux-0841c04d65937ad2808f59c43cb54a92473c8f0e.tar.gz linux-0841c04d65937ad2808f59c43cb54a92473c8f0e.tar.bz2 linux-0841c04d65937ad2808f59c43cb54a92473c8f0e.zip | |
dmi: Avoid unaligned memory access in save_mem_devices()
Firmware is not required to maintain alignment of SMBIOS
entries, so we should take care accessing fields within these
structures. Use "get_unaligned()" to avoid problems.
[ Found on ia64 (which grumbles about unaligned access) ]
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: Chen Gong <gong.chen@linux.intel.com>
Link: http://lkml.kernel.org/r/27d82dbff5be1025bf18ab88498632d36c2fcf3c.1383331440.git.tony.luck@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/dmi_scan.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 59579a744d58..c7e81ff8f3ef 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -8,6 +8,7 @@ #include <linux/bootmem.h> #include <linux/random.h> #include <asm/dmi.h> +#include <asm/unaligned.h> /* * DMI stands for "Desktop Management Interface". It is part @@ -347,7 +348,7 @@ static void __init save_mem_devices(const struct dmi_header *dm, void *v) pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); return; } - dmi_memdev[nr].handle = dm->handle; + dmi_memdev[nr].handle = get_unaligned(&dm->handle); dmi_memdev[nr].device = dmi_string(dm, d[0x10]); dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); nr++; |