Message-ID: <CAKb7Uvh+sGQJgEYb3SzVDH-YytX7WsU=EQnUEeZeWR-haHGdfA@mail.gmail.com>
Date:	Sun, 22 Nov 2015 15:49:13 -0500
From:	Ilia Mirkin <imirkin@...m.mit.edu>
To:	Tommi Rantala <tt.rantala@...il.com>
Cc:	"nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
	Ben Skeggs <bskeggs@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	DRI Development <dri-devel@...ts.freedesktop.org>,
	trinity@...r.kernel.org
Subject: Re: 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@...il.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@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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