Messages in this thread |  | | Subject | Re: [PATCH] block, bfq: fix uaf for bfqq in bic_set_bfqq() | From | Yu Kuai <> | Date | Mon, 30 Jan 2023 09:06:41 +0800 |
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Hi,
在 2023/01/30 5:51, Jens Axboe 写道: > On 1/28/23 6:38 PM, Yu Kuai wrote: >> Hi, Jens >> >> 在 2023/01/13 17:44, Yu Kuai 写道: >>> After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), >>> bic->bfqq will be accessed in bic_set_bfqq(), however, in some context >>> bic->bfqq will be freed first, and bic_set_bfqq() is called with the freed >>> bic->bfqq. >>> >>> Fix the problem by always freeing bfqq after bic_set_bfqq(). >>> >> >> Sorry that I send this patch will wrong email, and you might missed this >> patch. >> >> Can you apply this patch? This patch can't be applied directly to lower >> version due to Paolo's patchset, I'll send lts patch seperately. > > I'm confused... So this patch only applies to the 6.3 branch, yet we > need it in 6.2 as far as I can tell. Why isn't it against block-6.2 > then? >
Ok, I'll send a new patch against block-6.2.
Thanks, Kuai
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