Hi Raj, On Wed, Jan 16, 2019 at 11:16 AM Mani, Rajmohan <rajmohan.mani@xxxxxxxxx> wrote: > > Hi Laurent, > > Subject: Re: [PATCH v7 00/16] Intel IPU3 ImgU patchset > > > > Hello Raj, > > > > On Saturday, 12 January 2019 04:30:49 EET Mani, Rajmohan wrote: > > > > [snip] > > > > > I finally managed to reproduce the issue with 4.20-rc6, with KASAN > > > enabled and with CONFIG_SLUB_DEBUG_ON with SLAB_STORE_USER. > > > > Nice ! Thank you for your work. > > > > > The following line indicates the crash happens when yavta PID 10289 > > > tries to free the memory. > > > > > > [ 452.437844] BUG: KASAN: use-after-free in > > > ipu3_dmamap_free+0x50/0x9c [ipu3_imgu] [ 452.446123] Read of size 8 > > > at addr ffff8881503481a0 by task yavta/10289 > > > > > > The above looks to be normal, since it's the same task that allocated > > > this memory. > > > [ 452.685731] Allocated by task 10289: > > > > > > Before the above happened, yavta/10187 came in and freed this memory > > > per KASAN. > > > [ 452.787656] Freed by task 10187: > > > > > > Is this (one instance of yavta freeing the memory allocated by another > > > instance of yavta) expected? Or does it indicate that mmap giving the > > > same address across these 2 instances of yavta? I need to debug / > > > confirm the latter case. > > > > KASAN prints the task name (and process ID) to help you debugging the > > problem, but this doesn't mean that yavta is freeing the memory. yavta > > exercises the > > V4L2 API exposed by the driver, and internally, down the call stack, > > ipu3_dmamap_free() is called by the driver. According to the backtraces you > > posted, this is in response to a VIDIOC_STREAMOFF call from yavta. I would > > expect VIDIOC_STREAMOFF to free DMA mappings created for the buffers on > > the corresponding video nodes, and thus allocated by the same task. > > Ack. > > > The fact > > that memory is allocated in one task and freed in another seems weird to me > > in this case. > > > > I have instrumented the code around ipu3 dma map code, with a change to skip > dma free operations, if the current->pid is not the same as the pid that originally > did the dma alloc. > > There are no crashes in this case, as expected. > > I also confirmed that STREAM_ON/OFF is the one that results in this crash. > I need to spend more time on the alloc / free operations done by the yavta > Instances to see where the problem could be. > > This below line doesn't make sense, as the free call for pid 12986 occurs first, > before the alloc calls. Yavta application logs indicate the dma alloc has been > done for pid 12986, although I don't see corresponding dma alloc calls from pid 12986. I wonder if that doesn't mean that for some reason some V4L2 ioctls done from a context other than the owner (the one that first allocated vb2 buffers) end up triggering some buffer freeing/re-allocation. For VB2 buffers that's normally prevented by the core, but possibly we do some internal buffer management in non-buffer related V4L2 ioctls in the driver? > > [ 1604.194264] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > > > [ 1603.804102] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e530d000 @ VA 00000000a90fcad9 pid: 13281 comm: yavta > [ 1603.816015] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e530c000 @ VA 00000000a2315b8c pid: 13281 comm: yavta > [ 1603.827932] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e530b000 @ VA 0000000068fcc232 pid: 13281 comm: yavta > [ 1603.839818] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e530a000 @ VA 00000000bd8c0fc7 pid: 13281 comm: yavta > [ 1603.851904] ipu3_dmamap_alloc: allocated 286720 @ IOVA 0x00000000e52c4000 @ VA 00000000b19ebc35 pid: 13281 comm: yavta > [ 1603.864093] ipu3_dmamap_alloc: allocated 286720 @ IOVA 0x00000000e527e000 @ VA 00000000d890dde9 pid: 13281 comm: yavta > [ 1603.876335] ipu3_dmamap_alloc: allocated 286720 @ IOVA 0x00000000e5238000 @ VA 0000000032cb057a pid: 13281 comm: yavta > [ 1603.888533] ipu3_dmamap_alloc: allocated 286720 @ IOVA 0x00000000e51f2000 @ VA 000000004fdbe7b7 pid: 13281 comm: yavta > [ 1603.900747] ipu3_dmamap_alloc: allocated 233472 @ IOVA 0x00000000e51b9000 @ VA 000000001f7481bb pid: 13281 comm: yavta > [ 1603.912924] ipu3_dmamap_alloc: allocated 233472 @ IOVA 0x00000000e5180000 @ VA 000000005488930b pid: 13281 comm: yavta > [ 1603.925079] ipu3_dmamap_alloc: allocated 233472 @ IOVA 0x00000000e5147000 @ VA 00000000a1ef0f70 pid: 13281 comm: yavta > [ 1603.937276] ipu3_dmamap_alloc: allocated 233472 @ IOVA 0x00000000e510e000 @ VA 000000008f127f52 pid: 13281 comm: yavta > [ 1603.949461] ipu3_dmamap_alloc: allocated 303104 @ IOVA 0x00000000e50c4000 @ VA 000000002f4ec9a5 pid: 13281 comm: yavta > [ 1603.961689] ipu3_dmamap_alloc: allocated 303104 @ IOVA 0x00000000e507a000 @ VA 0000000003233f40 pid: 13281 comm: yavta > [ 1603.973868] ipu3_dmamap_alloc: allocated 303104 @ IOVA 0x00000000e5030000 @ VA 0000000069e1621c pid: 13281 comm: yavta > [ 1603.986152] ipu3_dmamap_alloc: allocated 303104 @ IOVA 0x00000000e4fe6000 @ VA 00000000b39f1cf0 pid: 13281 comm: yavta > [ 1603.998265] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fe5000 @ VA 000000002bd48bfe pid: 13281 comm: yavta > [ 1604.010163] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fe4000 @ VA 00000000261436cd pid: 13281 comm: yavta > [ 1604.022056] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fe3000 @ VA 00000000375b1a2a pid: 13281 comm: yavta > [ 1604.033989] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fe2000 @ VA 00000000a10eb873 pid: 13281 comm: yavta > [ 1604.045873] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fe1000 @ VA 00000000377717e8 pid: 13281 comm: yavta > [ 1604.057767] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fe0000 @ VA 000000004274cd53 pid: 13281 comm: yavta > [ 1604.069648] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fdf000 @ VA 000000008442a829 pid: 13281 comm: yavta > [ 1604.081537] ipu3_dmamap_alloc: allocated 4096 @ IOVA 0x00000000e4fde000 @ VA 000000007bd91d8f pid: 13281 comm: yavta > [ 1604.093973] ipu3-imgu 0000:00:05.0: dma buf resized from 3112960 to 7372800 > [ 1604.101777] SKIPPING ipu3_dmamap_free map pid: 1453 this pid 13281... > [ 1604.112144] ipu3_dmamap_alloc: allocated 7372800 @ IOVA 0x00000000e48d6000 @ VA 000000008f3f13db pid: 13281 comm: yavta > [ 1604.187741] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.189093] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e530d000 @ VA 00000000a90fcad9 pid: 13281 comm: yavta > [ 1604.194264] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194267] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194268] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194270] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194271] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194273] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194275] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194277] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194279] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194280] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194282] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194283] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194285] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194286] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194288] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194289] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194291] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194293] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194294] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194296] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194645] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194647] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194649] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194650] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194652] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194654] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194655] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194657] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 12986... > [ 1604.194659] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194661] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194663] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194665] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194667] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194669] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194671] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194672] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194674] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194676] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194678] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194680] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194681] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194683] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194685] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194686] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194688] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194690] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194691] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194693] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194695] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194696] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194698] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194700] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194702] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194703] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194705] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.194707] SKIPPING ipu3_dmamap_free map pid: 0 this pid 12986... > [ 1604.195044] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195046] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195048] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195049] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195051] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195053] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195054] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195056] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195058] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195060] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195062] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195063] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195065] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195066] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195067] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195069] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195070] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1604.195071] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1604.195072] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1604.195073] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1604.195075] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195077] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195078] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.195086] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.196725] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196727] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196728] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196730] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196731] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196732] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196733] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196734] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196735] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196736] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196738] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196739] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196740] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196741] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196742] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196744] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196745] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196746] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196747] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196748] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196749] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196751] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196752] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196753] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196754] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196755] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196756] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13182... > [ 1604.196757] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196759] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196760] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196761] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196762] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196763] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196764] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196765] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196767] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196768] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196769] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196770] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196771] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196772] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196773] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196775] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196776] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196777] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196778] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196779] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196780] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196781] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196782] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196784] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196785] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196786] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196787] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.196788] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13182... > [ 1604.206728] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e530c000 @ VA 00000000a2315b8c pid: 13281 comm: yavta > [ 1604.217497] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.221514] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e530b000 @ VA 0000000068fcc232 pid: 13281 comm: yavta > [ 1604.230381] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.236134] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e530a000 @ VA 00000000bd8c0fc7 pid: 13281 comm: yavta > [ 1604.236171] ipu3_dmamap_free: freeing 286720 @ IOVA 0x00000000e52c4000 @ VA 00000000b19ebc35 pid: 13281 comm: yavta > [ 1604.236253] ipu3_dmamap_free: freeing 286720 @ IOVA 0x00000000e527e000 @ VA 00000000d890dde9 pid: 13281 comm: yavta > [ 1604.236336] ipu3_dmamap_free: freeing 286720 @ IOVA 0x00000000e5238000 @ VA 0000000032cb057a pid: 13281 comm: yavta > [ 1604.236421] ipu3_dmamap_free: freeing 286720 @ IOVA 0x00000000e51f2000 @ VA 000000004fdbe7b7 pid: 13281 comm: yavta > [ 1604.244291] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.251102] ipu3_dmamap_free: freeing 233472 @ IOVA 0x00000000e51b9000 @ VA 000000001f7481bb pid: 13281 comm: yavta > [ 1604.251190] ipu3_dmamap_free: freeing 233472 @ IOVA 0x00000000e5180000 @ VA 000000005488930b pid: 13281 comm: yavta > [ 1604.251279] ipu3_dmamap_free: freeing 233472 @ IOVA 0x00000000e5147000 @ VA 00000000a1ef0f70 pid: 13281 comm: yavta > [ 1604.251354] ipu3_dmamap_free: freeing 233472 @ IOVA 0x00000000e510e000 @ VA 000000008f127f52 pid: 13281 comm: yavta > [ 1604.251430] ipu3_dmamap_free: freeing 303104 @ IOVA 0x00000000e50c4000 @ VA 000000002f4ec9a5 pid: 13281 comm: yavta > [ 1604.251529] ipu3_dmamap_free: freeing 303104 @ IOVA 0x00000000e507a000 @ VA 0000000003233f40 pid: 13281 comm: yavta > [ 1604.251623] ipu3_dmamap_free: freeing 303104 @ IOVA 0x00000000e5030000 @ VA 0000000069e1621c pid: 13281 comm: yavta > [ 1604.251716] ipu3_dmamap_free: freeing 303104 @ IOVA 0x00000000e4fe6000 @ VA 00000000b39f1cf0 pid: 13281 comm: yavta > [ 1604.251821] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.259683] SKIPPING ipu3_dmamap_free map pid: 13281 this pid 13084... > [ 1604.266371] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266374] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266376] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266381] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fe5000 @ VA 000000002bd48bfe pid: 13281 comm: yavta > [ 1604.266438] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fe4000 @ VA 00000000261436cd pid: 13281 comm: yavta > [ 1604.266477] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fe3000 @ VA 00000000375b1a2a pid: 13281 comm: yavta > [ 1604.266514] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fe2000 @ VA 00000000a10eb873 pid: 13281 comm: yavta > [ 1604.266550] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fe1000 @ VA 00000000377717e8 pid: 13281 comm: yavta > [ 1604.266586] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fe0000 @ VA 000000004274cd53 pid: 13281 comm: yavta > [ 1604.266623] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fdf000 @ VA 000000008442a829 pid: 13281 comm: yavta > [ 1604.266659] ipu3_dmamap_free: freeing 4096 @ IOVA 0x00000000e4fde000 @ VA 000000007bd91d8f pid: 13281 comm: yavta > [ 1604.266694] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266695] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266697] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266699] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266701] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266702] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266704] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266706] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266707] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266709] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266711] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266712] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266714] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266716] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266717] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266719] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266721] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266722] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266724] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266726] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266728] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266729] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266731] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266733] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266735] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266736] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266738] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.266740] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13281... > [ 1604.296912] ipu3-imgu 0000:00:05.0: wait cio gate idle timeout > [ 1604.298946] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1604.366931] ipu3-imgu 0000:00:05.0: wait cio gate idle timeout > [ 1604.371182] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.722685] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.729641] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.737607] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.744549] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.751506] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.758465] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.765394] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.772447] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.779387] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.787021] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.801912] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.808976] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.816089] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.823311] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.830260] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.837218] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.844203] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.851192] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.858148] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.865073] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.872038] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.878971] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.885905] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.892876] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.899815] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1605.906829] SKIPPING ipu3_dmamap_free map pid: 0 this pid 13084... > [ 1606.013925] ipu3-imgu 0000:00:05.0: wait cio gate idle timeout > > > > My guess is that when using multiple instances of yavta the calls to > > VIDIOC_STREAMOFF on the different video nodes are asynchronous and > > happen in a way that the driver does not expect. Regardless of how the API is > > exercised by applications, in a good or bad way, the IPU3 driver must not > > crash. It needs to be prepared for all V4L2 ioctls to be called at any time, and > > an application could call VIDIOC_STREAMOFF on any video node while the > > IPU3 is busy processing images. > > > > > With the help of local application that operates these pipes in a > > > serial fashion, I do not see this issue. > > > > [snip] > > > > -- > > Regards, > > > > Laurent Pinchart > > > > >
