Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Thu, 1 Feb 2018 12:04:14 +0100 | Subject | Re: [PATCH] soc: mediatek: Handle return of of_match_device function |
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Hi Himanshu,
On Thu, Feb 1, 2018 at 12:00 PM, Himanshu Jha <himanshujha199640@gmail.com> wrote: > In scpsys_probe function, return value of of_match_device function which > returns null is dereferenced without checking. Therefore, add a check for > potential null dereference. > > Detected by CoverityScan, CID#1424087 "Dereference null return value" > > Fixes: commit 53fddb1a66dd ("soc: mediatek: reduce code duplication of scpsys_probe across all SoCs") > Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
This is a false positive: as this is a pure-OF driver, scpsys_probe() is called if and only if a match was found in of_scpsys_match_tbl[].
> --- > drivers/soc/mediatek/mtk-scpsys.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c > index 435ce5e..6e7f196 100644 > --- a/drivers/soc/mediatek/mtk-scpsys.c > +++ b/drivers/soc/mediatek/mtk-scpsys.c > @@ -981,6 +981,9 @@ static int scpsys_probe(struct platform_device *pdev) > int i, ret; > > match = of_match_device(of_scpsys_match_tbl, &pdev->dev); > + if (!match) > + return -EINVAL; > + > soc = (const struct scp_soc_data *)match->data; > > scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs,
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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