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| author | Elena Reshetova <elena.reshetova@intel.com> | 2017-05-19 12:39:13 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-05-21 22:55:13 +0300 |
| commit | 473e90b2e8356f084dcf9c815a5170d4d4925897 (patch) | |
| tree | 59e060264aa0a1d6c3cc32a04dba8170bdceca56 /arch/x86/include/asm/amd_nb.h | |
| parent | 5f0744e50db1628d6de770b92278445b3de2779f (diff) | |
| download | linux-473e90b2e8356f084dcf9c815a5170d4d4925897.tar.xz | |
x86/mce: Convert threshold_bank.cpus from atomic_t to refcount_t
The refcount_t type and corresponding API should be used instead
of atomic_t when the variable is used as a reference counter. This
allows to avoid accidental refcounter overflows that might lead to
use-after-free situations.
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com>
Reviewed-by: David Windsor <dwindsor@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1492695536-5947-1-git-send-email-elena.reshetova@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/amd_nb.h')
| -rw-r--r-- | arch/x86/include/asm/amd_nb.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h index 00c88a01301d..da181ad1d5f8 100644 --- a/arch/x86/include/asm/amd_nb.h +++ b/arch/x86/include/asm/amd_nb.h @@ -3,6 +3,7 @@ #include <linux/ioport.h> #include <linux/pci.h> +#include <linux/refcount.h> struct amd_nb_bus_dev_range { u8 bus; @@ -55,7 +56,7 @@ struct threshold_bank { struct threshold_block *blocks; /* initialized to the number of CPUs on the node sharing this bank */ - atomic_t cpus; + refcount_t cpus; }; struct amd_northbridge { |