linux-kernel - Re: [PATCH] Kbuild: Handle too long symbols in kallsyms.c

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Message-ID: <CAKv+Gu_6_K0ZrRLMST6bYxqgSfhDJACoiArQg+K3pFaYjJxQsA@mail.gmail.com>
Date:   Fri, 25 Jan 2019 14:29:40 +0100
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     eugene.loh@...cle.com,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andi Kleen <ak@...ux.intel.com>, andi@...stfloor.org
Subject: Re: [PATCH] Kbuild: Handle too long symbols in kallsyms.c

(+ masahiro)

On Fri, 25 Jan 2019 at 14:28, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
>
> On Thu, 17 Jan 2019 at 23:46, <eugene.loh@...cle.com> wrote:
> >
> > From: Eugene Loh <eugene.loh@...cle.com>
> >
> > When checking for symbols with excessively long names,
> > account for null terminating character.
> >
> > Fixes: f3462aa952cf ("Kbuild: Handle longer symbols in kallsyms.c")
> > Signed-off-by: Eugene Loh <eugene.loh@...cle.com>
>
> Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
>
> > ---
> >  scripts/kallsyms.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
> > index 77cebad..f75e7bd 100644
> > --- a/scripts/kallsyms.c
> > +++ b/scripts/kallsyms.c
> > @@ -118,8 +118,8 @@ static int read_symbol(FILE *in, struct sym_entry *s)
> >                         fprintf(stderr, "Read error or end of file.\n");
> >                 return -1;
> >         }
> > -       if (strlen(sym) > KSYM_NAME_LEN) {
> > -               fprintf(stderr, "Symbol %s too long for kallsyms (%zu vs %d).\n"
> > +       if (strlen(sym) >= KSYM_NAME_LEN) {
> > +               fprintf(stderr, "Symbol %s too long for kallsyms (%zu >= %d).\n"
> >                                 "Please increase KSYM_NAME_LEN both in kernel and kallsyms.c\n",
> >                         sym, strlen(sym), KSYM_NAME_LEN);
> >                 return -1;
> > --
> > 1.8.3.1
> >