Re: [PATCH] media: pci: ttpci: av7110: avoid compiler optimization of reading data[0] in debiirq()

On Sun 2020-08-30 09:30:36, Sean Young wrote: > On Sun, Aug 30, 2020 at 04:20:42PM +0800, Jia-Ju Bai wrote: > > In debiirq(), data_0 stores the value of data[0], but it can be dropped > > by compiler optimization. Thus, data[0] is read through READ_ONCE(). > > > > Fixes: 6499a0db9b0f ("media: pci:

Re: [PATCH] media: pci: ttpci: av7110: avoid compiler optimization of reading data[0] in debiirq()

On Sun, Aug 30, 2020 at 04:20:42PM +0800, Jia-Ju Bai wrote: > In debiirq(), data_0 stores the value of data[0], but it can be dropped > by compiler optimization. Thus, data[0] is read through READ_ONCE(). > > Fixes: 6499a0db9b0f ("media: pci: ttpci: av7110: fix possible buffer overflow > caused b

[PATCH] media: pci: ttpci: av7110: avoid compiler optimization of reading data[0] in debiirq()

In debiirq(), data_0 stores the value of data[0], but it can be dropped by compiler optimization. Thus, data[0] is read through READ_ONCE(). Fixes: 6499a0db9b0f ("media: pci: ttpci: av7110: fix possible buffer overflow caused by bad DMA value in debiirq()") Reported-by: Pavel Machek Signed-off-b