[Bug 78297] New: Radeon uvd makes Flash player with VDPAU enabled to crash at vlVdpDecoderCreate

[Bug 78297] New: Radeon uvd makes Flash player with VDPAU enabled to crash at vlVdpDecoderCreate

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

          Priority: medium
            Bug ID: 78297
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Radeon uvd makes Flash player with VDPAU enabled to
                    crash at vlVdpDecoderCreate
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mail@3v1n0.net
          Hardware: Other
            Status: NEW
           Version: 10.1
         Component: Drivers/Gallium/r600
           Product: Mesa

Created attachment 98475
  --> https://bugs.freedesktop.org/attachment.cgi?id=98475&action=edit
Flash player crash using VDPAU with full-hd videos

I've enabled VDPAU support in flash player, and testing it with normal youtube
videos (up to 720p) gives good results (congrats!).

However, once I switch to 1080p quality, the flash player crashes, and this
seems to happen at the mesa vdpau driver level (for reference, this work using
Intel, although that's a different story, but I can't test nouveau here).

Anyway, I'm attaching here the backtrace. I've got it using mesa stock from
ubuntu, thus I've linked on the bt a paste of the exact files referenced by the
debugger.
Let me know if you need further debugging.

This is what happens in Ubuntu 14.04, but the same seems to happens in Arch
Linux (check https://bbs.archlinux.org/viewtopic.php?pid=1409666).

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[Bug 78297] Radeon uvd makes Flash player with VDPAU enabled to crash at vlVdpDecoderCreate

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

Marco Trevisan (Treviño) <mail@3v1n0.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #98475|0                           |1
        is obsolete|                            |

--- Comment #1 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
Created attachment 98480
  --> https://bugs.freedesktop.org/attachment.cgi?id=98480&action=edit
Flash player crash using VDPAU with full-hd videos

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

Marco Trevisan (Treviño) <mail@3v1n0.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Radeon uvd makes Flash      |Radeon uvd makes VDPAU
                   |player with VDPAU enabled   |clients to crash at
                   |to crash at                 |vlVdpDecoderCreate with
                   |vlVdpDecoderCreate          |1080p videos

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #2 from Christian König <deathsimple@vodafone.de> ---
What version of mesa is that? From the backtrace it looks like allocating a
buffers fails and then we crash because we want to clear the buffer.

But the line numbers look quite outdated to me.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #3 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
Created attachment 98482
  --> https://bugs.freedesktop.org/attachment.cgi?id=98482&action=edit
VLC crash using VDPAU with full-hd videos

This is actually more generic than I thought, as it happens also with VLC and
Mplayer.

Attaching the VLC backtrace here (very similar to flash and to mplayer).

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #4 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
(In reply to comment #2)
> What version of mesa is that? From the backtrace it looks like allocating a
> buffers fails and then we crash because we want to clear the buffer.
> 
> But the line numbers look quite outdated to me.

As said I've used the ubuntu debug version, so in the backtrace (the last one
attached, not the one I deprecated) I've linked the relative files:

src/gallium/state_trackers/vdpau/decode.c: http://paste.ubuntu.com/7398157/
src/gallium/drivers/radeon/radeon_uvd.c: http://paste.ubuntu.com/7398148/

I might test this with a more recent version as well, but since this seems to
happen in Arch as well, I suppose it's in git version too.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #5 from Christian König <deathsimple@vodafone.de> ---
(In reply to comment #4)
> (In reply to comment #2)
> > What version of mesa is that? From the backtrace it looks like allocating a
> > buffers fails and then we crash because we want to clear the buffer.
> > 
> > But the line numbers look quite outdated to me.
> 
> As said I've used the ubuntu debug version, so in the backtrace (the last
> one attached, not the one I deprecated) I've linked the relative files:
> 
> src/gallium/state_trackers/vdpau/decode.c: http://paste.ubuntu.com/7398157/
> src/gallium/drivers/radeon/radeon_uvd.c: http://paste.ubuntu.com/7398148/
> 
> I might test this with a more recent version as well, but since this seems
> to happen in Arch as well, I suppose it's in git version too.

Source files doesn't help at all, I need a version number or better git hash of
what revision this is.

It looks like allocating the decoded picture buffer works, but mapping it
returns a NULL pointer. Is there any other error message? Kernel or stderr?

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #6 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
(In reply to comment #5)
> Source files doesn't help at all, I need a version number or better git hash
> of what revision this is.

So, as I reported the ubuntu package is based on mesa 10.1, and the same is on
debian git, thus the git hash seems to be 4a86465 (and line numbers reported on
these backports matches).

The full tree, with ubuntu patches applied, is available at
http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/mesa/trusty/files
(or bzr branch lp:ubuntu/mesa).

> It looks like allocating the decoded picture buffer works, but mapping it
> returns a NULL pointer. Is there any other error message? Kernel or stderr?

Mh, no I'm just getting this (on VLC):

VLC media player 2.1.2 Rincewind (revision 2.1.2-0-ga4c4876)
[0x15adaa8] main interface error: no suitable interface module
[0x13a9148] main libvlc: Running vlc with the default interface. Use 'cvlc' to
use vlc without interface.
libva info: VA-API version 0.35.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'vdpau'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/vdpau_drv_video.so
libva info: Found init function __vaDriverInit_0_32
libva info: va_openDriver() returns 0
[0x7f4358c28e98] avcodec decoder: Using VA API version 0.35 for hardware
decoding.
Bus Error (core dumped)

And pretty similar on mplayer (http://pastebin.ubuntu.com/7398928/), nothing
more kernel side.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #7 from Christian König <deathsimple@vodafone.de> ---
(In reply to comment #6)
> [0x7f4358c28e98] avcodec decoder: Using VA API version 0.35 for hardware
> decoding.
> Bus Error (core dumped)

Oh! Well that's interesting. It's not an segmentation fault at all.

It means that the CPU can't properly access VRAM. Please provide full dmesg
output.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #8 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
Created attachment 98499
  --> https://bugs.freedesktop.org/attachment.cgi?id=98499&action=edit
dmesg

(In reply to comment #7)
> (In reply to comment #6)
> > [0x7f4358c28e98] avcodec decoder: Using VA API version 0.35 for hardware
> > decoding.
> > Bus Error (core dumped)
> 
> Oh! Well that's interesting. It's not an segmentation fault at all.
> 
> It means that the CPU can't properly access VRAM. Please provide full dmesg
> output.

Here you are...
Nothing seems directly related to this, though.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #9 from Christian König <deathsimple@vodafone.de> ---
That's the problem:

[    1.714537] [drm] Detected VRAM RAM=1024M, BAR=128M

Your PCI BAR is smaller than usually, for a REDWOOD 256M are normal. Going to
hack up a patch for this.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #10 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
(In reply to comment #9)
> That's the problem:
> 
> [    1.714537] [drm] Detected VRAM RAM=1024M, BAR=128M
> 
> Your PCI BAR is smaller than usually, for a REDWOOD 256M are normal. Going
> to hack up a patch for this.

Nice to hear!
But in these cases where there's not enough memory, shouldn't the vdpau driver
to fail returning an error (making the client to fallback to software
rendering), instead of crashing?

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #11 from Christian König <deathsimple@vodafone.de> ---
(In reply to comment #10)
> (In reply to comment #9)
> > That's the problem:
> > 
> > [    1.714537] [drm] Detected VRAM RAM=1024M, BAR=128M
> > 
> > Your PCI BAR is smaller than usually, for a REDWOOD 256M are normal. Going
> > to hack up a patch for this.
> 
> Nice to hear!
> But in these cases where there's not enough memory, shouldn't the vdpau
> driver to fail returning an error (making the client to fallback to software
> rendering), instead of crashing?

It's not the VDPAU driver that's failing here, it's the kernel.

When the kernel can't place a buffer into visible VRAM the buffer should be
moved into GART instead for CPU access. But instead we just return a SIGBUS to
the application effectively crashing it.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #12 from Christian König <deathsimple@vodafone.de> ---
Created attachment 98501
  --> https://bugs.freedesktop.org/attachment.cgi?id=98501&action=edit
Possible fix.

Please try the attached kernel patch.

Only tested with 3.15-rc2, but should apply to 3.14 as well.

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #13 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
(In reply to comment #12)
> Created attachment 98501 [details] [review]
> Possible fix.
> 
> Please try the attached kernel patch.
> 
> Only tested with 3.15-rc2, but should apply to 3.14 as well.

Thanks, it applies to 3.13 as well, but still same issue :(

Exactly same crash (http://paste.ubuntu.com/7405255/) and dmesg
(http://paste.ubuntu.com/7405259/)

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #14 from Christian König <deathsimple@vodafone.de> ---
(In reply to comment #13)
> (In reply to comment #12)
> > Created attachment 98501 [details] [review] [review]
> > Possible fix.
> > 
> > Please try the attached kernel patch.
> > 
> > Only tested with 3.15-rc2, but should apply to 3.14 as well.
> 
> Thanks, it applies to 3.13 as well, but still same issue :(
> 
> Exactly same crash (http://paste.ubuntu.com/7405255/) and dmesg
> (http://paste.ubuntu.com/7405259/)

Mhm, your dmesg looks like you are still booting the standard Ubuntu kernel:
[    0.000000] Linux version 3.13.0-24-generic (buildd@batsu) (gcc version
4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014
(Ubuntu 3.13.0-24.47-generic 3.13.9)

Grub usually selects the kernel with the highest version number for boot.
Please double check that you selected the self compiled version in grub while
booting.

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

--- Comment #15 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
(In reply to comment #14)
> Mhm, your dmesg looks like you are still booting the standard Ubuntu kernel:
> [    0.000000] Linux version 3.13.0-24-generic (buildd@batsu) (gcc version
> 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014
> (Ubuntu 3.13.0-24.47-generic 3.13.9)
> 
> Grub usually selects the kernel with the highest version number for boot.
> Please double check that you selected the self compiled version in grub
> while booting.

Sorry, that wasn't the problem since I patched the ubuntu kernel itself, but I
did forgot to update the initramfs, thus it was still loading the old module
-_-.

Anyway, once I fixed it this works like a charm!
Thanks a lot (and sorry again for the trouble)!

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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https://bugs.freedesktop.org/show_bug.cgi?id=78297

Marco Trevisan (Treviño) <mail@3v1n0.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|Mesa                        |DRI
            Version|10.1                        |unspecified
          Component|Drivers/Gallium/r600        |DRM/Radeon

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[Bug 78297] Radeon uvd makes VDPAU clients to crash at vlVdpDecoderCreate with 1080p videos

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Christian König <deathsimple@vodafone.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #16 from Christian König <deathsimple@vodafone.de> ---
Thanks for for the help.

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--- Comment #17 from Marco Trevisan (Treviño) <mail@3v1n0.net> ---
(In reply to comment #16)
> Thanks for for the help.

Thank you!

Once the patch gets into a drm branch, could you also please forward this to
stable? As it would be very nice to get this included by distros as stable
update.

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