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Date: Tue, 16 Apr 2013 09:53:12 +0800 From: libin <huawei.libin@...wei.com> To: Jonghwan Choi <jhbird.choi@...il.com> CC: <stable@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <jiang.liu@...wei.com>, <guohanjun@...wei.com>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, Jonghwan Choi <jhbird.choi@...sung.com> Subject: Re: [PATCH 3.8-stable] sched/debug: Fix sd->*_idx limit range avoiding overflow On 2013/4/15 22:15, Jonghwan Choi wrote: > From: libin <huawei.libin@...wei.com> > > This patch looks like it should be in the 3.8-stable tree, should we apply > it? > yes, I think this patch should be applied to the 3.8-stable tree. Thanks. Libin > ------------------ > > From: "libin <huawei.libin@...wei.com>" > > commit fd9b86d37a600488dbd80fe60cca46b822bff1cd upstream > > Commit 201c373e8e ("sched/debug: Limit sd->*_idx range on > sysctl") was an incomplete bug fix. > > This patch fixes sd->*_idx limit range to [0 ~ CPU_LOAD_IDX_MAX-1] > avoiding array overflow caused by setting sd->*_idx to CPU_LOAD_IDX_MAX > on sysctl. > > Signed-off-by: Libin <huawei.libin@...wei.com> > Cc: <jiang.liu@...wei.com> > Cc: <guohanjun@...wei.com> > Cc: Peter Zijlstra <peterz@...radead.org> > Link: http://lkml.kernel.org/r/51626610.2040607@huawei.com > Signed-off-by: Ingo Molnar <mingo@...nel.org> > Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com> > --- > kernel/sched/core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index 26058d0..112a32a 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -4948,7 +4948,7 @@ static void sd_free_ctl_entry(struct ctl_table **tablep) > } > > static int min_load_idx = 0; > -static int max_load_idx = CPU_LOAD_IDX_MAX; > +static int max_load_idx = CPU_LOAD_IDX_MAX-1; > > static void > set_table_entry(struct ctl_table *entry, > -- 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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