Messages in this thread | | | Subject | Re: [PATCH] watchdog: fix array may be out of bound | From | Guenter Roeck <> | Date | Sun, 12 Dec 2021 20:03:33 -0800 |
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On 12/12/21 7:34 PM, zhangyue wrote: > In this function, the param 'idx' may be > equal to 'DW_WDT_NUM_TOPS'. > At this time, the array 'dw_wdt->timeouts' > may be out of bound > > Signed-off-by: zhangyue <zhangyue1@kylinos.cn> > --- > drivers/watchdog/dw_wdt.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c > index cd578843277e..15fb1895c085 100644 > --- a/drivers/watchdog/dw_wdt.c > +++ b/drivers/watchdog/dw_wdt.c > @@ -155,6 +155,9 @@ static unsigned int dw_wdt_get_min_timeout(struct dw_wdt *dw_wdt) > break; > } > > + if (idx == DW_WDT_NUM_TOPS) > + return 1; > +
Please look at the code (and the comments) more closely. This can not happen.
Guenter
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