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SubjectRe: [PATCH] perf kmem: Fix memory leak in compact_gfp_flags()
Em Wed, Oct 16, 2019 at 10:04:03AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Oct 16, 2019 at 04:38:45PM +0800, Yunfeng Ye escreveu:
> > The memory @orig_flags is allocated by strdup(), it is freed on the
> > normal path, but leak to free on the error path.
>
> Are you using some tool to find out these problems? Or is it just visual
> inspection?

Anyway, applied after adding this to the commit log message:

Fixes: 0e11115644b3 ("perf kmem: Print gfp flags in human readable string")

- Arnaldo

> - Arnaldo
>
> > Fix this by adding free(orig_flags) on the error path.
> >
> > Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
> > ---
> > tools/perf/builtin-kmem.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
> > index 1e61e353f579..9661671cc26e 100644
> > --- a/tools/perf/builtin-kmem.c
> > +++ b/tools/perf/builtin-kmem.c
> > @@ -691,6 +691,7 @@ static char *compact_gfp_flags(char *gfp_flags)
> > new = realloc(new_flags, len + strlen(cpt) + 2);
> > if (new == NULL) {
> > free(new_flags);
> > + free(orig_flags);
> > return NULL;
> > }
> >
> > --
> > 2.7.4.3
>
> --
>
> - Arnaldo

--

- Arnaldo

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