linux-kernel - Re: [PATCH] block: Replace bio_check_ro()'s WARN

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Message-ID: <20191122190707.GA2136@infradead.org>
Date:   Fri, 22 Nov 2019 11:07:07 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Jens Axboe <axboe@...nel.dk>,
        syzbot+21cfe1f803e0e158acf1@...kaller.appspotmail.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: Replace bio_check_ro()'s WARN_ON()

On Fri, Nov 22, 2019 at 10:53:22AM -0800, Kees Cook wrote:
> Friendly ping! I keep tripping over this. Can this please get applied so
> we can silence syzbot and avoid needless WARNs? :)

What call stack reaches this?  Upper layers should never submit a write
bio on a read-only queue, and we need to fix that in the upper layer.