On Tue, May 10, 2016 at 03:40:31PM +0100, Julien Grall wrote:
> The loop that browses the array compat_hwcap_str will stop when a NULL
> is encountered, however NULL is missing at the end of array. This will
> result to overrun until one NULL is found somewhere in the memory.
Probably worth adding something like:
Note for backporting: commit 12d11817eaafa414 ("arm64: Move
/proc/cpuinfo handling code") moved this code. Prior to that commit, the
same change should be made in arch/arm64/kernel/setup.c.
> Fixes: 44b82b7700d0 "arm64: Fix up /proc/cpuinfo"
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
>
> ---
>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Suzuki K. Poulose <suzuki.poulose@xxxxxxx>
> ---
Wierd middle '---' between the Cc lines above.
Otherwise:
Reviewed-by: Mark Rutland <mark.rutland@xxxxxxx>
Thanks for fixing this, sorry for introducing it in the first place!
Mark.
> arch/arm64/kernel/cpuinfo.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
> index 84c8684..f0c3fb7 100644
> --- a/arch/arm64/kernel/cpuinfo.c
> +++ b/arch/arm64/kernel/cpuinfo.c
> @@ -87,7 +87,8 @@ static const char *const compat_hwcap_str[] = {
> "idivt",
> "vfpd32",
> "lpae",
> - "evtstrm"
> + "evtstrm",
> + NULL
> };
>
> static const char *const compat_hwcap2_str[] = {
> --
> 1.9.1
>
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