linux-kernel - Re: WARNING: ODEBUG bug in ext4_fill

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Message-ID: <20190831001432.GB22191@zzz.localdomain>
Date:   Fri, 30 Aug 2019 19:14:32 -0500
From:   Eric Biggers <ebiggers@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        linux-ext4@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Theodore Ts'o <tytso@....edu>,
        syzbot <syzbot+0bf8ddafbdf2c46eb6f3@...kaller.appspotmail.com>
Subject: Re: WARNING: ODEBUG bug in ext4_fill_super

On Fri, Aug 30, 2019 at 12:46:21PM -0700, 'Dmitry Vyukov' via syzkaller-bugs wrote:
> On Fri, Aug 30, 2019 at 12:42 PM 'Nick Desaulniers' via syzkaller-bugs
> <syzkaller-bugs@...glegroups.com> wrote:
> >
> > Dmitry,
> > Any idea how clang-built-linux got CC'ed on this?  Is syzcaller
> > running clang builds, yet?  (this looks like a GCC build)
> 
> syzbot always uses get_maintainers:
> 
> $ ./scripts/get_maintainer.pl -f fs/ext4/super.c
> "Theodore Ts'o" <tytso@....edu> (maintainer:EXT4 FILE SYSTEM)
> Andreas Dilger <adilger.kernel@...ger.ca> (maintainer:EXT4 FILE SYSTEM)
> linux-ext4@...r.kernel.org (open list:EXT4 FILE SYSTEM)
> linux-kernel@...r.kernel.org (open list)
> clang-built-linux@...glegroups.com (open list:CLANG/LLVM BUILD SUPPORT)
> 

CLANG/LLVM BUILD SUPPORT
L:	clang-built-linux@...glegroups.com
W:	https://clangbuiltlinux.github.io/
B:	https://github.com/ClangBuiltLinux/linux/issues
C:	irc://chat.freenode.net/clangbuiltlinux
S:	Supported
K:	\b(?i:clang|llvm)\b

So, clang-built-linux has volunteered to maintain every file that contains the
word "clang" or "llvm" anywhere in its contents :-)

$ grep clang fs/ext4/super.c
	(void) ei;	/* shut up clang warning if !CONFIG_LOCKDEP */

- Eric