linux-kernel - Re: [PATCH] scsi: libfc: Fix use after free in fc_exch_abts

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Message-ID: <yq135jrls0p.fsf@ca-mkp.ca.oracle.com>
Date:   Tue, 08 Mar 2022 22:33:03 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Jianglei Nie <niejianglei2021@....com>
Cc:     hare@...e.de, jejb@...ux.ibm.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: libfc: Fix use after free in fc_exch_abts_resp()


Jianglei,

> fc_exch_release(ep) will decrease the ep's reference count. When the
> reference count reaches zero, it is freed. But ep is still used in the
> following code, which will lead to a use after free.

Applied to 5.18/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering