linux-kernel - Re: net/xfrm/xfrm_policy.c:1286:8: error: variable 'dir' is uninitialized when used here [-Werror,-Wuninitialized]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240830170449.GX1368797@kernel.org>
Date: Fri, 30 Aug 2024 18:04:49 +0100
From: Simon Horman <horms@...nel.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: clang-built-linux <llvm@...ts.linux.dev>,
	Netdev <netdev@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	lkft-triage@...ts.linaro.org,
	Linux Regressions <regressions@...ts.linux.dev>,
	Anders Roxell <anders.roxell@...aro.org>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Florian Westphal <fw@...len.de>,
	Steffen Klassert <steffen.klassert@...unet.com>
Subject: Re: net/xfrm/xfrm_policy.c:1286:8: error: variable 'dir' is
 uninitialized when used here [-Werror,-Wuninitialized]

On Fri, Aug 30, 2024 at 05:47:06PM +0100, Simon Horman wrote:
> + Florian, Steffen
> 
> On Fri, Aug 30, 2024 at 12:15:10PM +0530, Naresh Kamboju wrote:
> > The x86_64 defconfig builds failed on today's Linux next-20240829
> > due to following build warnings / errors.
> > 
> > Regressions:
> > * i386, build
> >   - clang-18-defconfig
> >   - clang-nightly-defconfig
> > 
> > * x86_64, build
> >   - clang-18-lkftconfig
> >   - clang-18-lkftconfig-compat
> >   - clang-18-lkftconfig-kcsan
> >   - clang-18-lkftconfig-no-kselftest-frag
> >   - clang-18-x86_64_defconfig
> >   - clang-nightly-lkftconfig
> >   - clang-nightly-lkftconfig-kselftest
> >   - clang-nightly-x86_64_defconfig
> >   - rustclang-nightly-lkftconfig-kselftest
> > 
> > first seen on next-20240829.
> >   Good: next-20240828
> >   BAD:  next-20240829
> > 
> > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> > 
> > build log:
> > --------
> > net/xfrm/xfrm_policy.c:1286:8: error: variable 'dir' is uninitialized
> > when used here [-Werror,-Wuninitialized]
> >  1286 |                 if ((dir & XFRM_POLICY_MASK) == XFRM_POLICY_OUT) {
> >       |                      ^~~
> > net/xfrm/xfrm_policy.c:1257:9: note: initialize the variable 'dir' to
> > silence this warning
> >  1257 |         int dir;
> >       |                ^
> >       |                 = 0
> > 1 error generated.
> 
> I believe that is due to
> commit 08c2182cf0b4 ("xfrm: policy: use recently added helper in more places")
> 
> I will work on a fix to initialise dir in the loop where it is used.

Patch is here:
- [PATCH ipsec-next] xfrm: Initialise dir in xfrm_hash_rebuild()
  https://lore.kernel.org/netdev/20240830-xfrm_hash_rebuild-dir-v1-1-f75092d07e1b@kernel.org/T/#u