From: Yu Kuai <yukuai1@huaweicloud.com> To: Jan Kara <jack@suse.cz>, Yu Kuai <yukuai1@huaweicloud.com> Cc: tj@kernel.org, josef@toxicpanda.com, axboe@kernel.dk, paolo.valente@linaro.org, cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, yi.zhang@huawei.com, "yukuai (C)" <yukuai3@huawei.com> Subject: Re: [PATCH] block, bfq: fix null pointer dereference in bfq_bio_bfqg() Date: Tue, 8 Nov 2022 21:15:08 +0800 [thread overview] Message-ID: <6cd64e77-e14d-ff9c-d97f-055165a7b214@huaweicloud.com> (raw) In-Reply-To: <20221108124841.et6cddvczncp2cz7@quack3> Hi! 在 2022/11/08 20:48, Jan Kara 写道: > > Hum, that is indeed contrieved ;). Your fixup makes sense so feel free to > add: > > Reviewed-by: Jan Kara <jack@suse.cz> Thanks for the review, our test do many unusual operations together... Thanks, Kuai > > Honza > >> >> diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c >> index 144bca006463..7d624a3a3f0f 100644 >> --- a/block/bfq-cgroup.c >> +++ b/block/bfq-cgroup.c >> @@ -610,6 +610,10 @@ struct bfq_group *bfq_bio_bfqg(struct bfq_data *bfqd, struct bio *bio) >> struct bfq_group *bfqg; >> >> while (blkg) { >> + if (!blkg->online) { >> + blkg = blkg->parent; >> + continue; >> + } >> bfqg = blkg_to_bfqg(blkg); >> if (bfqg->online) { >> bio_associate_blkg_from_css(bio, &blkg->blkcg->css); >> -- >> 2.31.1 >>
WARNING: multiple messages have this Message-ID (diff)
From: Yu Kuai <yukuai1-XF6JlduFytWkHkcT6e4Xnw@public.gmane.org> To: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>, Yu Kuai <yukuai1-XF6JlduFytWkHkcT6e4Xnw@public.gmane.org> Cc: tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, josef-DigfWCa+lFGyeJad7bwFQA@public.gmane.org, axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org, paolo.valente-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, yi.zhang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, "yukuai (C)" <yukuai3-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> Subject: Re: [PATCH] block, bfq: fix null pointer dereference in bfq_bio_bfqg() Date: Tue, 8 Nov 2022 21:15:08 +0800 [thread overview] Message-ID: <6cd64e77-e14d-ff9c-d97f-055165a7b214@huaweicloud.com> (raw) In-Reply-To: <20221108124841.et6cddvczncp2cz7@quack3> Hi! ÔÚ 2022/11/08 20:48, Jan Kara дµÀ: > > Hum, that is indeed contrieved ;). Your fixup makes sense so feel free to > add: > > Reviewed-by: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org> Thanks for the review, our test do many unusual operations together... Thanks, Kuai > > Honza > >> >> diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c >> index 144bca006463..7d624a3a3f0f 100644 >> --- a/block/bfq-cgroup.c >> +++ b/block/bfq-cgroup.c >> @@ -610,6 +610,10 @@ struct bfq_group *bfq_bio_bfqg(struct bfq_data *bfqd, struct bio *bio) >> struct bfq_group *bfqg; >> >> while (blkg) { >> + if (!blkg->online) { >> + blkg = blkg->parent; >> + continue; >> + } >> bfqg = blkg_to_bfqg(blkg); >> if (bfqg->online) { >> bio_associate_blkg_from_css(bio, &blkg->blkcg->css); >> -- >> 2.31.1 >>
next prev parent reply other threads:[~2022-11-08 13:15 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-08 10:34 [PATCH] block, bfq: fix null pointer dereference in bfq_bio_bfqg() Yu Kuai 2022-11-08 10:34 ` Yu Kuai 2022-11-08 12:48 ` Jan Kara 2022-11-08 12:48 ` Jan Kara 2022-11-08 13:15 ` Yu Kuai [this message] 2022-11-08 13:15 ` Yu Kuai 2022-11-08 14:13 ` Jens Axboe 2022-11-08 14:13 ` Jens Axboe 2022-11-08 22:50 ` Chaitanya Kulkarni 2022-11-08 22:50 ` Chaitanya Kulkarni 2022-11-10 3:30 ` Yu Kuai
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