linux-kernel - Re: [PATCH] scsi: libsas: fix use-after-free bug in smp_execute_task

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Message-ID: <yq15yhbs890.fsf@ca-mkp.ca.oracle.com>
Date:   Sun, 25 Sep 2022 12:56:44 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Duoming Zhou <duoming@....edu.cn>
Cc:     linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        jejb@...ux.ibm.com, martin.petersen@...cle.com, kuba@...nel.org,
        john.garry@...wei.com, gregkh@...uxfoundation.org,
        davem@...emloft.net
Subject: Re: [PATCH] scsi: libsas: fix use-after-free bug in
 smp_execute_task_sg


Duoming,

> When executing SMP task failed, the smp_execute_task_sg() calls
> del_timer() to delete the "slow_task->timer". However, if the timer
> handler sas_task_internal_timedout() is running, the del_timer() in
> smp_execute_task_sg() will not stop it and the UAF bug will happen.

Applied to 6.1/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering