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From:   "Chen, Guchun" <Guchun.Chen@amd.com>
To:     Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        =?iso-8859-1?Q?Christian_K=F6nig?= 
        <ckoenig.leichtzumerken@gmail.com>
Subject: RE: Command "clinfo" causes BUG: kernel NULL pointer dereference,
 address: 0000000000000008 on driver amdgpu
Thread-Topic: Command "clinfo" causes BUG: kernel NULL pointer dereference,
 address: 0000000000000008 on driver amdgpu
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Date:   Tue, 19 Jul 2022 02:33:46 +0000
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Patch https://patchwork.freedesktop.org/series/106024/ should fix this.

Regards,
Guchun

-----Original Message-----
From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> On Behalf Of Mikhail =
Gavrilov
Sent: Tuesday, July 19, 2022 7:50 AM
To: amd-gfx list <amd-gfx@lists.freedesktop.org>; Linux List Kernel Mailing=
 <linux-kernel@vger.kernel.org>; Christian K=F6nig <ckoenig.leichtzumerken@=
gmail.com>
Subject: Command "clinfo" causes BUG: kernel NULL pointer dereference, addr=
ess: 0000000000000008 on driver amdgpu

Hi guys I continue testing 5.19 rc7 and found the bug.
Command "clinfo" causes BUG: kernel NULL pointer dereference, address:
0000000000000008 on driver amdgpu.

Here is trace:
[ 1320.203332] BUG: kernel NULL pointer dereference, address: 0000000000000=
008 [ 1320.203338] #PF: supervisor read access in kernel mode [ 1320.203340=
] #PF: error_code(0x0000) - not-present page [ 1320.203341] PGD 0 P4D 0 [ 1=
320.203344] Oops: 0000 [#1] PREEMPT SMP NOPTI [ 1320.203346] CPU: 5 PID: 12=
26 Comm: kworker/5:2 Tainted: G W L
-------- --- 5.19.0-0.rc7.53.fc37.x86_64+debug #1 [ 1320.203348] Hardware n=
ame: System manufacturer System Product Name/ROG STRIX X570-I GAMING, BIOS =
4403 04/27/2022 [ 1320.203350] Workqueue: events delayed_fput [ 1320.203354=
] RIP: 0010:dma_resv_add_fence+0x5a/0x2d0
[ 1320.203358] Code: 85 c0 0f 84 43 02 00 00 8d 50 01 09 c2 0f 88 47
02 00 00 8b 15 73 10 99 01 49 8d 45 70 48 89 44 24 10 85 d2 0f 85 05
02 00 00 <49> 8b 44 24 08 48 3d 80 93 53 97 0f 84 06 01 00 00 48 3d 20
93 53
[ 1320.203360] RSP: 0018:ffffaf4cc1adfc68 EFLAGS: 00010246 [ 1320.203362] R=
AX: ffff976660408208 RBX: ffff975f545f2000 RCX: 0000000000000000 [ 1320.203=
363] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff976660408198 [ 13=
20.203364] RBP: ffff976806f6e800 R08: 0000000000000000 R09: 000000000000000=
0 [ 1320.203366] R10: 0000000000000000 R11: 0000000000000001 R12: 000000000=
0000000 [ 1320.203367] R13: ffff976660408198 R14: ffff975f545f2000 R15: fff=
f976660408198 [ 1320.203368] FS: 0000000000000000(0000) GS:ffff976de1200000=
(0000)
knlGS:0000000000000000
[ 1320.203370] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1320.2033=
71] CR2: 0000000000000008 CR3: 00000007fb31c000 CR4: 0000000000350ee0 [ 132=
0.203372] Call Trace:
[ 1320.203374] <TASK>
[ 1320.203378] amdgpu_amdkfd_gpuvm_destroy_cb+0x5d/0x1e0 [amdgpu] [ 1320.20=
3516] amdgpu_vm_fini+0x2f/0x4e0 [amdgpu] [ 1320.203625] ? mutex_destroy+0x2=
1/0x50 [ 1320.203629] amdgpu_driver_postclose_kms+0x1da/0x2b0 [amdgpu] [ 13=
20.203734] drm_file_free.part.0+0x20d/0x260 [ 1320.203738] drm_release+0x6a=
/0x120 [ 1320.203741] __fput+0xab/0x270 [ 1320.203743] delayed_fput+0x1f/0x=
30 [ 1320.203745] process_one_work+0x2a0/0x600 [ 1320.203749] worker_thread=
+0x4f/0x3a0 [ 1320.203751] ? process_one_work+0x600/0x600 [ 1320.203753] kt=
hread+0xf5/0x120 [ 1320.203755] ? kthread_complete_and_exit+0x20/0x20
[ 1320.203758] ret_from_fork+0x22/0x30
[ 1320.203764] </TASK>

Full kernel log is here:
https://nam11.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fpastebi=
n.com%2FEeKh2LEr&amp;data=3D05%7C01%7Cguchun.chen%40amd.com%7C06749e19d65b4=
18748dc08da6918435f%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C6379378501=
84140997%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTi=
I6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=3Dx1%2FR7m9Vy2XwkXKXsmEO=
eaAyv44ZKNsU4caZJOOSIvY%3D&amp;reserved=3D0

And one hour later after a lot of messages "BUG: workqueue lockup" GPU comp=
letely hung.

I will be glad to test patches that fix this bug.

--
Best Regards,
Mike Gavrilov.