thr3ads.net - Nouveau - [Nouveau] nouveau: iowrite32 oops & warning at drivers/gpu/drm/nouveau/nouveau

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Tommi Rantala

2015-Nov-22 20:30 UTC

[Nouveau] nouveau: iowrite32 oops & warning at drivers/gpu/drm/nouveau/nouveau_fence.c:198

Hello,

I'm seeing this warning and oops when trying to fuzz linus
v4.4-rc1-290-g3ad5d7e with trinity.

------------[ cut here ]------------
WARNING: CPU: 1 PID: 4308 at
drivers/gpu/drm/nouveau/nouveau_fence.c:198
nouveau_fence_context_new+0x22e/0x270()
CPU: 1 PID: 4308 Comm: trinity-c19 Tainted: G    B           4.4.0-rc1+ #1
Hardware name: Dell Inc. OptiPlex 990/0D6H9T, BIOS A06 07/25/2011
0000000000000009 ffff8800ac4bf8b0 ffffffff818a802e 0000000000000000
ffff8800ac4bf8f0 ffffffff8111bc75 ffffffff820170be ffff8800ac9c1050
ffff88015b0e8cc0 ffff8800ca703070 ffff88016f432130 ffff8800afb675f0
Call Trace:
[<ffffffff818a802e>] dump_stack+0x4b/0x6d
[<ffffffff8111bc75>] warn_slowpath_common+0x95/0xd0
[<ffffffff820170be>] ? nouveau_fence_context_new+0x22e/0x270
[<ffffffff8111be45>] warn_slowpath_null+0x15/0x20
[<ffffffff820170be>] nouveau_fence_context_new+0x22e/0x270
[<ffffffff82016e90>] ? nouveau_fence_context_free+0x20/0x20
[<ffffffff8130a06e>] ? kasan_kmalloc+0x5e/0x70
[<ffffffff81306803>] ? kmem_cache_alloc_trace+0x123/0x290
[<ffffffff8201a263>] ? nv84_fence_context_new+0x73/0x2d0
[<ffffffff8201a28d>] nv84_fence_context_new+0x9d/0x2d0
[<ffffffff8201b351>] nvc0_fence_context_new+0x11/0x70
[<ffffffff820155f1>] nouveau_channel_new+0x7e1/0xca0
[<ffffffff8130fc6c>] ? create_object+0x28c/0x4d0
[<ffffffff82014e10>] ? nouveau_channel_prep+0x4b0/0x4b0
[<ffffffff8130fde6>] ? create_object+0x406/0x4d0
[<ffffffff8130f9e0>] ? kmemleak_disable+0x70/0x70
[<ffffffff82012d57>] ? nouveau_abi16_get+0x37/0x80
[<ffffffff8118dfc6>] ? trace_hardirqs_on_caller+0x16/0x280
[<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
[<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
[<ffffffff81306803>] ? kmem_cache_alloc_trace+0x123/0x290
[<ffffffff8201333c>] ? nouveau_abi16_ioctl_channel_alloc+0xec/0x4d0
[<ffffffff820133fe>] nouveau_abi16_ioctl_channel_alloc+0x1ae/0x4d0
[<ffffffff82013250>] ? nouveau_abi16_ioctl_setparam+0x10/0x10
[<ffffffff81a85ccb>] drm_ioctl+0x20b/0x6b0
[<ffffffff811bfc66>] ? debug_lockdep_rcu_enabled+0x26/0x40
[<ffffffff81a85ac0>] ? drm_ioctl_permit+0x120/0x120
[<ffffffff8118e23d>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff81fe9f99>] nouveau_drm_ioctl+0x99/0x110
[<ffffffff813342be>] do_vfs_ioctl+0x4ae/0x800
[<ffffffff8180a3d9>] ? selinux_file_ioctl+0x1f9/0x2d0
[<ffffffff81333e10>] ? ioctl_preallocate+0x140/0x140
[<ffffffff8180a1e0>] ? selinux_parse_skb.constprop.42+0x7c0/0x7c0
[<ffffffff811dbdcb>] ? do_setitimer+0x28b/0x420
[<ffffffff811dbfe5>] ? alarm_setitimer+0x85/0xe0
[<ffffffff811dbf60>] ? do_setitimer+0x420/0x420
[<ffffffff81334684>] SyS_ioctl+0x74/0x80
[<ffffffff82f34ed7>] entry_SYSCALL_64_fastpath+0x12/0x6f
---[ end trace 780046761495600a ]---



BUG: unable to handle kernel paging request at ffffc90001880000
IP: [<ffffffff818d20be>] iowrite32+0x2e/0x40
PGD 174f36067 PUD 174f37067 PMD 16a13b067 PTE 0
Oops: 0002 [#1] SMP KASAN
CPU: 3 PID: 4638 Comm: trinity-c19 Tainted: G    B   W       4.4.0-rc1+ #1
Hardware name: Dell Inc. OptiPlex 990/0D6H9T, BIOS A06 07/25/2011
task: ffff8800ab8e1a00 ti: ffff8800ab6c0000 task.ti: ffff8800ab6c0000
RIP: 0010:[<ffffffff818d20be>]  [<ffffffff818d20be>]
iowrite32+0x2e/0x40
RSP: 0018:ffff8800ab6c75f8  EFLAGS: 00010292
RAX: ffffed001940c2b8 RBX: ffffc90001880000 RCX: ffff8800ca0615c7
RDX: 0000000000000000 RSI: ffffc90001880000 RDI: 0000000000000000
RBP: ffff8800ab6c7618 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffed001443979e R12: ffff8800ca061590
R13: 0000000000000000 R14: ffff880152553390 R15: ffffffff833e0220
FS:  00007f48be30a700(0000) GS:ffff880175800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90001880000 CR3: 00000000ab455000 CR4: 00000000000406e0
Stack:
ffffffff81f58f8b 0000000000080004 ffff8800ca061590 ffff880169d3a4c0
ffff8800ab6c76b8 ffffffff81fa3b68 0000000000000000 00000141c1800000
ffffffff00000001 ffff880000006000 ffffffff00001000 ffff8800ab6c7820
Call Trace:
[<ffffffff81f58f8b>] ? nvkm_instobj_wr32+0x2b/0x40
[<ffffffff81fa3b68>] gf100_fifo_gpfifo_new+0x528/0xa50
[<ffffffff81f94b58>] nvkm_fifo_class_new+0x58/0x70
[<ffffffff81f94b00>] ? nvkm_fifo_uevent_ctor+0x50/0x50
[<ffffffff81f7bdf3>] nvkm_udevice_child_new+0x63/0x80
[<ffffffff81ed1aea>] nvkm_ioctl_new+0x2aa/0x5e0
[<ffffffff8130fa6c>] ? create_object+0x8c/0x4d0
[<ffffffff810b584a>] ? save_stack_address+0x6a/0x70
[<ffffffff81ed1840>] ? nvkm_ioctl_del+0x110/0x110
[<ffffffff81f7bd90>] ? nvkm_udevice_map+0x90/0x90
[<ffffffff8130fde6>] ? create_object+0x406/0x4d0
[<ffffffff81ed282b>] nvkm_ioctl+0x1fb/0x510
[<ffffffff8118dfc6>] ? trace_hardirqs_on_caller+0x16/0x280
[<ffffffff81fedce0>] ? nvkm_client_map+0x10/0x10
[<ffffffff81fedced>] nvkm_client_ioctl+0xd/0x10
[<ffffffff81eccf6d>] nvif_object_ioctl+0xad/0xe0
[<ffffffff81ecdb40>] nvif_object_init+0x160/0x1e0
[<ffffffff82014f9d>] nouveau_channel_new+0x18d/0xca0
[<ffffffff8130fc6c>] ? create_object+0x28c/0x4d0
[<ffffffff82014e10>] ? nouveau_channel_prep+0x4b0/0x4b0
[<ffffffff8130fde6>] ? create_object+0x406/0x4d0
[<ffffffff8130f9e0>] ? kmemleak_disable+0x70/0x70
[<ffffffff82012d57>] ? nouveau_abi16_get+0x37/0x80
[<ffffffff8118dfc6>] ? trace_hardirqs_on_caller+0x16/0x280
[<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
[<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
[<ffffffff81306803>] ? kmem_cache_alloc_trace+0x123/0x290
[<ffffffff8201333c>] ? nouveau_abi16_ioctl_channel_alloc+0xec/0x4d0
[<ffffffff820133fe>] nouveau_abi16_ioctl_channel_alloc+0x1ae/0x4d0
[<ffffffff82013250>] ? nouveau_abi16_ioctl_setparam+0x10/0x10
[<ffffffff81a85ccb>] drm_ioctl+0x20b/0x6b0
[<ffffffff811bfc66>] ? debug_lockdep_rcu_enabled+0x26/0x40
[<ffffffff81a85ac0>] ? drm_ioctl_permit+0x120/0x120
[<ffffffff8118e23d>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff81fe9f99>] nouveau_drm_ioctl+0x99/0x110
[<ffffffff813342be>] do_vfs_ioctl+0x4ae/0x800
[<ffffffff8180a3d9>] ? selinux_file_ioctl+0x1f9/0x2d0
 [<ffffffff81333e10>] ? ioctl_preallocate+0x140/0x140
[<ffffffff8180a1e0>] ? selinux_parse_skb.constprop.42+0x7c0/0x7c0
[<ffffffff811dbdcb>] ? do_setitimer+0x28b/0x420
[<ffffffff811dbfe5>] ? alarm_setitimer+0x85/0xe0
[<ffffffff811dbf60>] ? do_setitimer+0x420/0x420
[<ffffffff81334684>] SyS_ioctl+0x74/0x80
[<ffffffff82f34ed7>] entry_SYSCALL_64_fastpath+0x12/0x6f
Code: ff ff 03 00 77 25 48 81 fe 00 00 01 00 76 07 0f b7 d6 89 f8 ef
c3 55 48 89 f7 48 c7 c6 e0 39 1e 83 48 89 e5 e8 84 fd ff ff 5d c3 <89>
3e c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 81 fe
RIP  [<ffffffff818d20be>] iowrite32+0x2e/0x40
RSP <ffff8800ab6c75f8>
CR2: ffffc90001880000
---[ end trace 7800467614956062 ]---


Some nouveau messages from the boot, if this helps:

nouveau 0000:01:00.0: NVIDIA GF119 (0d90a0a1)
nouveau 0000:01:00.0: bios: version 75.19.55.00.02
nouveau 0000:01:00.0: fb: 1024 MiB DDR3
[TTM] Zone  kernel: Available graphics memory: 2590256 kiB
[TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[TTM] Initializing pool allocator
[TTM] Initializing DMA pool allocator
nouveau 0000:01:00.0: DRM: VRAM: 1024 MiB
nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
nouveau 0000:01:00.0: DRM: TMDS table version 2.0
nouveau 0000:01:00.0: DRM: DCB version 4.0
nouveau 0000:01:00.0: DRM: DCB outp 00: 02000300 00000000
nouveau 0000:01:00.0: DRM: DCB outp 01: 01000302 00020030
nouveau 0000:01:00.0: DRM: DCB outp 02: 02011362 00020010
nouveau 0000:01:00.0: DRM: DCB outp 03: 04022310 00000000
nouveau 0000:01:00.0: DRM: DCB conn 00: 00001030
nouveau 0000:01:00.0: DRM: DCB conn 01: 00002161
nouveau 0000:01:00.0: DRM: DCB conn 02: 00000200
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
nouveau 0000:01:00.0: DRM: MM: using COPY0 for buffer copies
nouveau 0000:01:00.0: No connectors reported connected with modes
[drm] Cannot find any crtc or sizes - going 1024x768
nouveau 0000:01:00.0: DRM: allocated 1024x768 fb: 0x60000, bo ffff880169d36e40
fbcon: nouveaufb (fb0) is primary device
Console: switching to colour frame buffer device 128x48
nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 0

Ilia Mirkin

2015-Nov-22 20:49 UTC

head link

[Nouveau] nouveau: iowrite32 oops & warning at drivers/gpu/drm/nouveau/nouveau_fence.c:198

Hi Tommi,

Not sure if these apply here but there are a couple of outstanding
locking fixes available in
http://cgit.freedesktop.org/~darktama/nouveau/ -- specifically these
two:

http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=2f3a56ad019e378a352e9cb7a559f478826f1a87
http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=4179b15c6e9fcfb253e811e5477debe46c84c395

Not sure if they affect this particular issue, but thought I'd point
it out. Are you fuzzing with multiple threads, or just one at a time?
Do you have a branch somewhere public with the changes to add nouveau
ioctl support to trinity?

Cheers,

  -ilia


On Sun, Nov 22, 2015 at 3:30 PM, Tommi Rantala <tt.rantala at gmail.com>
wrote:> Hello,
>
> I'm seeing this warning and oops when trying to fuzz linus
> v4.4-rc1-290-g3ad5d7e with trinity.
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 4308 at
> drivers/gpu/drm/nouveau/nouveau_fence.c:198
> nouveau_fence_context_new+0x22e/0x270()
> CPU: 1 PID: 4308 Comm: trinity-c19 Tainted: G    B           4.4.0-rc1+ #1
> Hardware name: Dell Inc. OptiPlex 990/0D6H9T, BIOS A06 07/25/2011
> 0000000000000009 ffff8800ac4bf8b0 ffffffff818a802e 0000000000000000
> ffff8800ac4bf8f0 ffffffff8111bc75 ffffffff820170be ffff8800ac9c1050
> ffff88015b0e8cc0 ffff8800ca703070 ffff88016f432130 ffff8800afb675f0
> Call Trace:
> [<ffffffff818a802e>] dump_stack+0x4b/0x6d
> [<ffffffff8111bc75>] warn_slowpath_common+0x95/0xd0
> [<ffffffff820170be>] ? nouveau_fence_context_new+0x22e/0x270
> [<ffffffff8111be45>] warn_slowpath_null+0x15/0x20
> [<ffffffff820170be>] nouveau_fence_context_new+0x22e/0x270
> [<ffffffff82016e90>] ? nouveau_fence_context_free+0x20/0x20
> [<ffffffff8130a06e>] ? kasan_kmalloc+0x5e/0x70
> [<ffffffff81306803>] ? kmem_cache_alloc_trace+0x123/0x290
> [<ffffffff8201a263>] ? nv84_fence_context_new+0x73/0x2d0
> [<ffffffff8201a28d>] nv84_fence_context_new+0x9d/0x2d0
> [<ffffffff8201b351>] nvc0_fence_context_new+0x11/0x70
> [<ffffffff820155f1>] nouveau_channel_new+0x7e1/0xca0
> [<ffffffff8130fc6c>] ? create_object+0x28c/0x4d0
> [<ffffffff82014e10>] ? nouveau_channel_prep+0x4b0/0x4b0
> [<ffffffff8130fde6>] ? create_object+0x406/0x4d0
> [<ffffffff8130f9e0>] ? kmemleak_disable+0x70/0x70
> [<ffffffff82012d57>] ? nouveau_abi16_get+0x37/0x80
> [<ffffffff8118dfc6>] ? trace_hardirqs_on_caller+0x16/0x280
> [<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
> [<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
> [<ffffffff81306803>] ? kmem_cache_alloc_trace+0x123/0x290
> [<ffffffff8201333c>] ? nouveau_abi16_ioctl_channel_alloc+0xec/0x4d0
> [<ffffffff820133fe>] nouveau_abi16_ioctl_channel_alloc+0x1ae/0x4d0
> [<ffffffff82013250>] ? nouveau_abi16_ioctl_setparam+0x10/0x10
> [<ffffffff81a85ccb>] drm_ioctl+0x20b/0x6b0
> [<ffffffff811bfc66>] ? debug_lockdep_rcu_enabled+0x26/0x40
> [<ffffffff81a85ac0>] ? drm_ioctl_permit+0x120/0x120
> [<ffffffff8118e23d>] ? trace_hardirqs_on+0xd/0x10
> [<ffffffff81fe9f99>] nouveau_drm_ioctl+0x99/0x110
> [<ffffffff813342be>] do_vfs_ioctl+0x4ae/0x800
> [<ffffffff8180a3d9>] ? selinux_file_ioctl+0x1f9/0x2d0
> [<ffffffff81333e10>] ? ioctl_preallocate+0x140/0x140
> [<ffffffff8180a1e0>] ? selinux_parse_skb.constprop.42+0x7c0/0x7c0
> [<ffffffff811dbdcb>] ? do_setitimer+0x28b/0x420
> [<ffffffff811dbfe5>] ? alarm_setitimer+0x85/0xe0
> [<ffffffff811dbf60>] ? do_setitimer+0x420/0x420
> [<ffffffff81334684>] SyS_ioctl+0x74/0x80
> [<ffffffff82f34ed7>] entry_SYSCALL_64_fastpath+0x12/0x6f
> ---[ end trace 780046761495600a ]---
>
>
>
> BUG: unable to handle kernel paging request at ffffc90001880000
> IP: [<ffffffff818d20be>] iowrite32+0x2e/0x40
> PGD 174f36067 PUD 174f37067 PMD 16a13b067 PTE 0
> Oops: 0002 [#1] SMP KASAN
> CPU: 3 PID: 4638 Comm: trinity-c19 Tainted: G    B   W       4.4.0-rc1+ #1
> Hardware name: Dell Inc. OptiPlex 990/0D6H9T, BIOS A06 07/25/2011
> task: ffff8800ab8e1a00 ti: ffff8800ab6c0000 task.ti: ffff8800ab6c0000
> RIP: 0010:[<ffffffff818d20be>]  [<ffffffff818d20be>]
iowrite32+0x2e/0x40
> RSP: 0018:ffff8800ab6c75f8  EFLAGS: 00010292
> RAX: ffffed001940c2b8 RBX: ffffc90001880000 RCX: ffff8800ca0615c7
> RDX: 0000000000000000 RSI: ffffc90001880000 RDI: 0000000000000000
> RBP: ffff8800ab6c7618 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: ffffed001443979e R12: ffff8800ca061590
> R13: 0000000000000000 R14: ffff880152553390 R15: ffffffff833e0220
> FS:  00007f48be30a700(0000) GS:ffff880175800000(0000)
knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffc90001880000 CR3: 00000000ab455000 CR4: 00000000000406e0
> Stack:
> ffffffff81f58f8b 0000000000080004 ffff8800ca061590 ffff880169d3a4c0
> ffff8800ab6c76b8 ffffffff81fa3b68 0000000000000000 00000141c1800000
> ffffffff00000001 ffff880000006000 ffffffff00001000 ffff8800ab6c7820
> Call Trace:
> [<ffffffff81f58f8b>] ? nvkm_instobj_wr32+0x2b/0x40
> [<ffffffff81fa3b68>] gf100_fifo_gpfifo_new+0x528/0xa50
> [<ffffffff81f94b58>] nvkm_fifo_class_new+0x58/0x70
> [<ffffffff81f94b00>] ? nvkm_fifo_uevent_ctor+0x50/0x50
> [<ffffffff81f7bdf3>] nvkm_udevice_child_new+0x63/0x80
> [<ffffffff81ed1aea>] nvkm_ioctl_new+0x2aa/0x5e0
> [<ffffffff8130fa6c>] ? create_object+0x8c/0x4d0
> [<ffffffff810b584a>] ? save_stack_address+0x6a/0x70
> [<ffffffff81ed1840>] ? nvkm_ioctl_del+0x110/0x110
> [<ffffffff81f7bd90>] ? nvkm_udevice_map+0x90/0x90
> [<ffffffff8130fde6>] ? create_object+0x406/0x4d0
> [<ffffffff81ed282b>] nvkm_ioctl+0x1fb/0x510
> [<ffffffff8118dfc6>] ? trace_hardirqs_on_caller+0x16/0x280
> [<ffffffff81fedce0>] ? nvkm_client_map+0x10/0x10
> [<ffffffff81fedced>] nvkm_client_ioctl+0xd/0x10
> [<ffffffff81eccf6d>] nvif_object_ioctl+0xad/0xe0
> [<ffffffff81ecdb40>] nvif_object_init+0x160/0x1e0
> [<ffffffff82014f9d>] nouveau_channel_new+0x18d/0xca0
> [<ffffffff8130fc6c>] ? create_object+0x28c/0x4d0
> [<ffffffff82014e10>] ? nouveau_channel_prep+0x4b0/0x4b0
> [<ffffffff8130fde6>] ? create_object+0x406/0x4d0
> [<ffffffff8130f9e0>] ? kmemleak_disable+0x70/0x70
> [<ffffffff82012d57>] ? nouveau_abi16_get+0x37/0x80
> [<ffffffff8118dfc6>] ? trace_hardirqs_on_caller+0x16/0x280
> [<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
> [<ffffffff81309e36>] ? kasan_unpoison_shadow+0x36/0x50
> [<ffffffff81306803>] ? kmem_cache_alloc_trace+0x123/0x290
> [<ffffffff8201333c>] ? nouveau_abi16_ioctl_channel_alloc+0xec/0x4d0
> [<ffffffff820133fe>] nouveau_abi16_ioctl_channel_alloc+0x1ae/0x4d0
> [<ffffffff82013250>] ? nouveau_abi16_ioctl_setparam+0x10/0x10
> [<ffffffff81a85ccb>] drm_ioctl+0x20b/0x6b0
> [<ffffffff811bfc66>] ? debug_lockdep_rcu_enabled+0x26/0x40
> [<ffffffff81a85ac0>] ? drm_ioctl_permit+0x120/0x120
> [<ffffffff8118e23d>] ? trace_hardirqs_on+0xd/0x10
> [<ffffffff81fe9f99>] nouveau_drm_ioctl+0x99/0x110
> [<ffffffff813342be>] do_vfs_ioctl+0x4ae/0x800
> [<ffffffff8180a3d9>] ? selinux_file_ioctl+0x1f9/0x2d0
>  [<ffffffff81333e10>] ? ioctl_preallocate+0x140/0x140
> [<ffffffff8180a1e0>] ? selinux_parse_skb.constprop.42+0x7c0/0x7c0
> [<ffffffff811dbdcb>] ? do_setitimer+0x28b/0x420
> [<ffffffff811dbfe5>] ? alarm_setitimer+0x85/0xe0
> [<ffffffff811dbf60>] ? do_setitimer+0x420/0x420
> [<ffffffff81334684>] SyS_ioctl+0x74/0x80
> [<ffffffff82f34ed7>] entry_SYSCALL_64_fastpath+0x12/0x6f
> Code: ff ff 03 00 77 25 48 81 fe 00 00 01 00 76 07 0f b7 d6 89 f8 ef
> c3 55 48 89 f7 48 c7 c6 e0 39 1e 83 48 89 e5 e8 84 fd ff ff 5d c3
<89>
> 3e c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 81 fe
> RIP  [<ffffffff818d20be>] iowrite32+0x2e/0x40
> RSP <ffff8800ab6c75f8>
> CR2: ffffc90001880000
> ---[ end trace 7800467614956062 ]---
>
>
> Some nouveau messages from the boot, if this helps:
>
> nouveau 0000:01:00.0: NVIDIA GF119 (0d90a0a1)
> nouveau 0000:01:00.0: bios: version 75.19.55.00.02
> nouveau 0000:01:00.0: fb: 1024 MiB DDR3
> [TTM] Zone  kernel: Available graphics memory: 2590256 kiB
> [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
> [TTM] Initializing pool allocator
> [TTM] Initializing DMA pool allocator
> nouveau 0000:01:00.0: DRM: VRAM: 1024 MiB
> nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
> nouveau 0000:01:00.0: DRM: TMDS table version 2.0
> nouveau 0000:01:00.0: DRM: DCB version 4.0
> nouveau 0000:01:00.0: DRM: DCB outp 00: 02000300 00000000
> nouveau 0000:01:00.0: DRM: DCB outp 01: 01000302 00020030
> nouveau 0000:01:00.0: DRM: DCB outp 02: 02011362 00020010
> nouveau 0000:01:00.0: DRM: DCB outp 03: 04022310 00000000
> nouveau 0000:01:00.0: DRM: DCB conn 00: 00001030
> nouveau 0000:01:00.0: DRM: DCB conn 01: 00002161
> nouveau 0000:01:00.0: DRM: DCB conn 02: 00000200
> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> [drm] Driver supports precise vblank timestamp query.
> nouveau 0000:01:00.0: DRM: MM: using COPY0 for buffer copies
> nouveau 0000:01:00.0: No connectors reported connected with modes
> [drm] Cannot find any crtc or sizes - going 1024x768
> nouveau 0000:01:00.0: DRM: allocated 1024x768 fb: 0x60000, bo
ffff880169d36e40
> fbcon: nouveaufb (fb0) is primary device
> Console: switching to colour frame buffer device 128x48
> nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
> [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 0
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel

Tommi Rantala

2015-Nov-23 20:17 UTC

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[Nouveau] nouveau: iowrite32 oops & warning at drivers/gpu/drm/nouveau/nouveau_fence.c:198

2015-11-22 22:49 GMT+02:00 Ilia Mirkin <imirkin at
alum.mit.edu>:> Not sure if these apply here but there are a couple of outstanding
> locking fixes available in
> http://cgit.freedesktop.org/~darktama/nouveau/ -- specifically these
> two:
>
>
http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=2f3a56ad019e378a352e9cb7a559f478826f1a87
>
http://cgit.freedesktop.org/~darktama/nouveau/commit/?id=4179b15c6e9fcfb253e811e5477debe46c84c395
>
> Not sure if they affect this particular issue, but thought I'd point
> it out. Are you fuzzing with multiple threads, or just one at a time?
> Do you have a branch somewhere public with the changes to add nouveau
> ioctl support to trinity?
Hi!

I applied those two on top of v4.4-rc2, but the same warning and oops
are still easily reproducible. I can test with older kernels and/or
try to bisect when I have more time, unless anyone has better ideas.

I'm actually running unmodified trinity, and for this purpose only
fuzzing the ioctl() syscall from multiple processes, and opening only
the files from /dev/dri/:

$ ./trinity -q -loff -C20 -c ioctl -V /dev/dri/

Trinity knows about a bunch of DRM ioctl commands, but the rest of the
ioctl arguments will be garbage:
https://github.com/kernelslacker/trinity/blob/master/ioctls/drm.c

Tommi

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