Date: Thu, 21 Feb 2019 15:16:14 -0800 From: Kees Cook <keescook@...omium.org> To: Stephen Rothwell <sfr@...b.auug.org.au> Cc: "Tobin C. Harding" <me@...in.cc>, Jann Horn <jannh@...gle.com>, "Tobin C. Harding" <tobin@...nel.org>, Shuah Khan <shuah@...nel.org>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Kernel Hardening <kernel-hardening@...ts.openwall.com>, kernel list <linux-kernel@...r.kernel.org>, Andy Lutomirski <luto@...capital.net>, Rasmus Villemoes <linux@...musvillemoes.dk>, Daniel Micay <danielmicay@...il.com>, Arnd Bergmann <arnd@...db.de>, Miguel Ojeda <miguel.ojeda.sandonis@...il.com>, "Gustavo A. R. Silva" <gustavo@...eddedor.com> Subject: Re: [PATCH 5/6] lib: Fix function documentation for strncpy_from_user On Thu, Feb 21, 2019 at 12:27 PM Stephen Rothwell <sfr@...b.auug.org.au> wrote: > > Hi Kees, > > On Wed, 20 Feb 2019 22:02:32 -0800 Kees Cook <keescook@...omium.org> wrote: > > > > What I can't quite figure out yet is how to find a way for sfr to flag > > newly added users of strcpy, strncpy, and strlcpy. We might need to > > bring back __deprecated, but hide it behind a W=linux-next flag or > > something crazy. Stephen, in your builds you're already injecting > > -Wimplicit-fallthrough: do you do W=1 or anything like that? If not, I > > think we need some W= setting for your linux-next builds that generate > > the maintainer-nag warnings... > > I just have a set of compiler flags that my build scripts explicitly > enable by setting KCFLAGS. Okay, so you could include some -D option to enable it. I'll see if I can cook something up. -- Kees Cook
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