linux-kernel - Re: ubiblock: null pointer dereference using scatterlist in work

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Message-ID: <961736756.5775.1689627258484.JavaMail.zimbra@nod.at>
Date:   Mon, 17 Jul 2023 22:54:18 +0200 (CEST)
From:   Richard Weinberger <richard@....at>
To:     Stephan Wurm <stephan.wurm@...berle.de>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Johannes Eigner <johannes.eigner@...berle.de>
Subject: Re: ubiblock: null pointer dereference using scatterlist in
 work_queue

----- Ursprüngliche Mail -----
> Von: "Stephan Wurm" <stephan.wurm@...berle.de>
> [   50.502309] 55nth call of ubi_ea_read_leb_sg
> [   64.939917] sgl[00000000] => 00000000: page_link=4025764322, offset=0,
> length=512

Hmm, blk_rq_map_sg() returns non-zero,  sg_nents() is also non-zero but the very first sg list entry is
not virtually mapped.


Thanks,
//richard