* [PATCH] use clamp_t in UNAME26 fix
@ 2012-10-20 1:45 Kees Cook
2012-10-20 3:22 ` Andrew Morton
0 siblings, 1 reply; 4+ messages in thread
From: Kees Cook @ 2012-10-20 1:45 UTC (permalink / raw)
To: Linus Torvalds; +Cc: linux-kernel, Fengguang Wu, Andrew Morton
The min/max call needed to have explicit types on some architectures
(e.g. mn10300). Use clamp_t instead to avoid the warning.
kernel/sys.c: In function 'override_release':
kernel/sys.c:1287:10: warning: comparison of distinct pointer types lacks a cast [enabled by default]
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
kernel/sys.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sys.c b/kernel/sys.c
index 01865c6..e6e0ece 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1284,7 +1284,7 @@ static int override_release(char __user *release, size_t len)
rest++;
}
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 40;
- copy = min(sizeof(buf), max_t(size_t, 1, len));
+ copy = clamp_t(size_t, len, 1, sizeof(buf));
copy = scnprintf(buf, copy, "2.6.%u%s", v, rest);
ret = copy_to_user(release, buf, copy + 1);
}
--
1.7.9.5
--
Kees Cook
Chrome OS Security
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] use clamp_t in UNAME26 fix
2012-10-20 1:45 [PATCH] use clamp_t in UNAME26 fix Kees Cook
@ 2012-10-20 3:22 ` Andrew Morton
2012-10-20 4:30 ` Kees Cook
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Morton @ 2012-10-20 3:22 UTC (permalink / raw)
To: Kees Cook; +Cc: Linus Torvalds, linux-kernel, Fengguang Wu
On Fri, 19 Oct 2012 18:45:53 -0700 Kees Cook <keescook@chromium.org> wrote:
>
> The min/max call needed to have explicit types on some architectures
> (e.g. mn10300). Use clamp_t instead to avoid the warning.
>
> kernel/sys.c: In function 'override_release':
> kernel/sys.c:1287:10: warning: comparison of distinct pointer types lacks a cast [enabled by default]
>
> Reported-by: Fengguang Wu <fengguang.wu@intel.com>
> Signed-off-by: Kees Cook <keescook@chromium.org>
Needs a cc:stable in the changelog before committing, please.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] use clamp_t in UNAME26 fix
2012-10-20 3:22 ` Andrew Morton
@ 2012-10-20 4:30 ` Kees Cook
2012-10-24 15:48 ` Greg KH
0 siblings, 1 reply; 4+ messages in thread
From: Kees Cook @ 2012-10-20 4:30 UTC (permalink / raw)
To: Andrew Morton; +Cc: Linus Torvalds, linux-kernel, Fengguang Wu, stable
Argh, whoops. Greg, can you please include
31fd84b95eb211d5db460a1dda85e004800a7b52 in stable?
Thanks,
-Kees
On Fri, Oct 19, 2012 at 8:22 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
> On Fri, 19 Oct 2012 18:45:53 -0700 Kees Cook <keescook@chromium.org> wrote:
>
>>
>> The min/max call needed to have explicit types on some architectures
>> (e.g. mn10300). Use clamp_t instead to avoid the warning.
>>
>> kernel/sys.c: In function 'override_release':
>> kernel/sys.c:1287:10: warning: comparison of distinct pointer types lacks a cast [enabled by default]
>>
>> Reported-by: Fengguang Wu <fengguang.wu@intel.com>
>> Signed-off-by: Kees Cook <keescook@chromium.org>
>
> Needs a cc:stable in the changelog before committing, please.
--
Kees Cook
Chrome OS Security
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] use clamp_t in UNAME26 fix
2012-10-20 4:30 ` Kees Cook
@ 2012-10-24 15:48 ` Greg KH
0 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2012-10-24 15:48 UTC (permalink / raw)
To: Kees Cook
Cc: Andrew Morton, Linus Torvalds, linux-kernel, Fengguang Wu, stable
On Fri, Oct 19, 2012 at 09:30:24PM -0700, Kees Cook wrote:
> Argh, whoops. Greg, can you please include
> 31fd84b95eb211d5db460a1dda85e004800a7b52 in stable?
Now applied, thanks.
greg k-h
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-10-24 15:48 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2012-10-20 1:45 [PATCH] use clamp_t in UNAME26 fix Kees Cook
2012-10-20 3:22 ` Andrew Morton
2012-10-20 4:30 ` Kees Cook
2012-10-24 15:48 ` Greg KH
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