lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Sun, 31 Oct 2021 08:40:04 +0530
From:   Kishon Vijay Abraham I <>
To:     Péter Ujfalusi <>,
        Vinod Koul <>
CC:     <>, <>,
        Vignesh Raghavendra <>
Subject: Re: [PATCH v3 0/2] dmaengine: ti: k3-udma: Fix NULL pointer
 dereference error

Hi Peter,

On 30/10/21 12:15 pm, Péter Ujfalusi wrote:
> Hi Kishon,
> On 29/10/2021 18:12, Kishon Vijay Abraham I wrote:
>> NULL pointer de-reference error was observed when all the PCIe endpoint
>> functions (22 function in J721E) request a DMA channel. The issue was
>> specfically observed when using mem-to-mem copy.
>> Changes from v2:
>> 1) Fix commit subject and commit log to mention bchan/rchan/tchan to NULL
>>    suggested by Peter.
> Looks good, however the second patch also fixes the rflow. It is
> mentioned in the commit message itself.
> I suppose the reason for a split is that the UDMA part
> (rchan/tchan/rflow) could be backported as fix for older kernel since
> the bchan came later with BCDMA/PKTDMA support?
> Can you find a good Fixes tag for these?

I'll now add "Cc: <>" so that it gets merged to 5.14. It
doesn't apply cleanly to any of the other stable kernel.
>> Changes from v1:
>> 1) Split the patch for BCDMA and PKTDMA separately
>> 2) Fixed the return value of udma_get_rflow() to 0.
>> 3) Removed the fixes tag as the patches does not directly apply to the
>> commits.
>> v1 =>
>> v2 =>
>> Kishon Vijay Abraham I (2):
>>   dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail
>>   dmaengine: ti: k3-udma: Set rchan/tchan to NULL if a channel request
>>     fail
> dmaengine: ti: k3-udma: Set r/tchan or rflow to NULL if request fail
> would have bee a better subject line, if you feel you can send an update.
> Acked-by: Peter Ujfalusi <>

Thank You! Will fix and resend.

Best Regards,

Powered by blists - more mailing lists