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Date: Tue, 6 Aug 2013 11:36:44 -0700 From: Kees Cook <keescook@...omium.org> To: Chen Gang <gang.chen@...anux.com> Cc: Al Viro <viro@...iv.linux.org.uk>, Oleg Nesterov <oleg@...hat.com>, Robin Holt <holt@....com>, Andrew Morton <akpm@...ux-foundation.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 0/2] kernel/sys.c: for setfsgid(), return the current gid when error occurs On Tue, Aug 6, 2013 at 1:00 AM, Chen Gang <gang.chen@...anux.com> wrote: > They are 2 related patches for setfsgid(). > > Patch 1 for bug fix: return the current gid when error occurs. > Patch 2 for cleaning code: remove useless variable 'old_fsgid'. > > Signed-off-by: Chen Gang <gang.chen@...anux.com> > -- > kernel/sys.c | 15 +++++---------- > 1 files changed, 5 insertions(+), 10 deletions(-) Making a change like this might have dramatic effects. So, a few questions, to help better understand: How long as the behavior been this way on Linux? What is the origin of the documentation that states it differently? Do existing userspace tools already depend on the current behavior? What specific problem will be solved by changing this? Thanks, -Kees -- Kees Cook Chrome OS Security -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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