amd-staging-drm-next: Oops - BUG: unable to handle kernel NULL pointer dereference, bisected.

Wed Jan 30 14:37:43 UTC 2019

On 2019-01-30 7:42 a.m., Koenig, Christian wrote:
> Does the attached patch fix the issue?

No.  Now I get a lockup when I start GNOME and try to bring up a 
terminal.  The patch also didn't apply cleanly on top of drm-next but I 
was able to just manually add the line.

[   88.018735] general protection fault: 0000 [#1] SMP NOPTI
[   88.018741] CPU: 5 PID: 4164 Comm: gnome-shel:cs0 Tainted: G        W 
         5.0.0-rc1+ #20
[   88.018743] Hardware name: System manufacturer System Product 
Name/TUF B350M-PLUS GAMING, BIOS 4011 04/19/2018
[   88.018750] RIP: 0010:ttm_bo_bulk_move_lru_tail+0x36/0x190 [ttm]
[   88.018753] Code: 90 48 85 d2 74 66 48 8b 4c 37 98 4c 8b 92 b0 00 00 
00 4c 8d 9a a8 00 00 00 4c 8b 0a 48 8b 81 a8 00 00 00 48 81 c1 a8 00 00 
00 <49> 89 02 4c 8b 92 b0 00 00 00 4c 89 50 08 44 89 c0 48 c1 e0 04 4c
[   88.018755] RSP: 0018:ffffb419c1fefb18 EFLAGS: 00010296
[   88.018757] RAX: ffff9692d9a013a0 RBX: 0000000000000000 RCX: 
ffff9693032f2f90
[   88.018759] RDX: ffff9692e099cad8 RSI: 0000000000000070 RDI: 
ffff9693058a7598
[   88.018761] RBP: ffff9692ed34f4e8 R08: 0000000000000000 R09: 
6b6b6b6b6b6b6b6b
[   88.018762] R10: 6b6b6b6b6b6b6b6b R11: ffff9692e099cb80 R12: 
ffff9693058a7598
[   88.018763] R13: ffff9693058a6fc8 R14: 0000000000000001 R15: 
ffffffffc033dbc0
[   88.018765] FS:  00007fc351843700(0000) GS:ffff969337b40000(0000) 
knlGS:0000000000000000
[   88.018767] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   88.018769] CR2: 00007fa78adb08a0 CR3: 0000000206d56000 CR4: 
00000000003406e0
[   88.018770] Call Trace:
[   88.018807]  amdgpu_vm_move_to_lru_tail+0xe1/0x100 [amdgpu]
[   88.018842]  amdgpu_cs_ioctl+0x14de/0x1ad0 [amdgpu]
[   88.018846]  ? __switch_to_asm+0x34/0x70
[   88.018881]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
[   88.018884]  drm_ioctl_kernel+0xa4/0xf0
[   88.018887]  drm_ioctl+0x1db/0x370
[   88.018921]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
[   88.018970]  amdgpu_drm_ioctl+0x44/0x80 [amdgpu]
[   88.018975]  do_vfs_ioctl+0x9f/0x610
[   88.018980]  ? __x64_sys_futex+0x137/0x180
[   88.018983]  ksys_ioctl+0x5b/0x90
[   88.018986]  __x64_sys_ioctl+0x11/0x20
[   88.018989]  do_syscall_64+0x43/0xf0
[   88.018992]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   88.018995] RIP: 0033:0x7fc37a1b1c97
[   88.018997] Code: 00 00 90 48 8b 05 09 82 2c 00 64 c7 00 26 00 00 00 
48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d9 81 2c 00 f7 d8 64 89 01 48
[   88.018999] RSP: 002b:00007fc3518425d8 EFLAGS: 00000202 ORIG_RAX: 
0000000000000010
[   88.019002] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 
00007fc37a1b1c97
[   88.019004] RDX: 00007fc3518426b0 RSI: 00000000c0186444 RDI: 
000000000000000c
[   88.019005] RBP: 00007fc351842610 R08: 00007fc351842720 R09: 
00007fc351842798
[   88.019007] R10: 0000000000000000 R11: 0000000000000202 R12: 
00007ffdf8dc068e
[   88.019009] R13: 00007ffdf8dc068f R14: 00007ffdf8dc0690 R15: 
0000000000000000
[   88.019011] Modules linked in: fuse amdgpu mfd_core chash gpu_sched 
ttm ax88179_178a usbnet
[   88.019019] ---[ end trace dc532cd45c6dc064 ]---

Tom

> 
> Christian.
> 
> Am 30.01.19 um 13:06 schrieb Christian König:
>> Sorry I accidentally replied to the wrong mail.
>>
>> This is a new issue. Going to take a look now.
>>
>> Christian.
>>
>> Am 30.01.19 um 13:02 schrieb Christian König:
>>> This is a known issue, see here as well 
>>> https://bugs.freedesktop.org/show_bug.cgi?id=109487
>>>
>>> Christian.
>>>
>>> Am 30.01.19 um 12:07 schrieb Przemek Socha:
>>>> Good morning,
>>>>
>>>> after last pull from the amd-staging-drm-next tree (29th of February) I have
>>>> random Oops on A6 6310 APU with r4 Mullins.
>>>>
>>>> Here is the Oops part of the log taken from pstore:
>>>>
>>>> <1>[   55.166270] BUG: unable to handle kernel NULL pointer dereference at
>>>> 0000000000000208
>>>> <1>[   55.166281] #PF error: [normal kernel read fault]
>>>> <6>[   55.166285] PGD 0 P4D 0
>>>> <4>[   55.166293] Oops: 0000 [#1] PREEMPT SMP
>>>> <4>[   55.166301] CPU: 3 PID: 11006 Comm: kwin_x11:cs0 Not tainted 5.0.0-rc1+
>>>> #44
>>>> <4>[   55.166305] Hardware name: LENOVO 80E3/Lancer 5B2, BIOS A2CN45WW(V2.13)
>>>> 08/04/2016
>>>> <4>[   55.166320] RIP: 0010:ttm_bo_bulk_move_lru_tail+0xd3/0x188 [ttm]
>>>> <4>[   55.166326] Code: 00 4c 8b 0a 48 8b 81 a8 00 00 00 48 81 c1 a8 00 00 00
>>>> 49 89 02 4c 8b 92 b0 00 00 00 4c 89 50 08 44 89 c0 48 c1 e0 04 4c 01 c8 <4c>
>>>> 8b 90 08 02 00 00 4d 89 1a 4c 8b 90 08 02 00 00 4c 89 92 b0 00
>>>> <4>[   55.166330] RSP: 0018:ffffa8bdc0f33b18 EFLAGS: 00010246
>>>> <4>[   55.166335] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
>>>> ffff9cfa935778f8
>>>> <4>[   55.166339] RDX: ffff9cfa950c5050 RSI: 0000000000000070 RDI:
>>>> ffff9cfa93575dd0
>>>> <4>[   55.166342] RBP: ffff9cfa5d44d800 R08: 0000000000000000 R09:
>>>> 0000000000000000
>>>> <4>[   55.166346] R10: ffff9cfa8f7730f8 R11: ffff9cfa950c50f8 R12: ffff9cfa93575dd0
>>>> <4>[   55.166350] R13: ffff9cfa93575800 R14: 0000000000000001 R15: ffffffffc03adc10
>>>> <4>[   55.166355] FS:  00007fb327fff700(0000) GS:ffff9cfa97b80000(0000) knlGS:
>>>> 0000000000000000
>>>> <4>[   55.166359] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>>> <4>[   55.166363] CR2: 0000000000000208 CR3: 00000002150f0000 CR4:
>>>> 00000000000406e0
>>>> <4>[   55.166366] Call Trace:
>>>> <4>[   55.166477]  amdgpu_vm_move_to_lru_tail+0xe4/0x100 [amdgpu]
>>>> <4>[   55.166563]  amdgpu_cs_ioctl+0x14e7/0x1b08 [amdgpu]
>>>> <4>[   55.166586]  ? __switch_to_asm+0x40/0x70
>>>> <4>[   55.166689]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
>>>> <4>[   55.166698]  drm_ioctl_kernel+0xa4/0xe8
>>>> <4>[   55.166707]  drm_ioctl+0x1db/0x358
>>>> <4>[   55.166805]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
>>>> <4>[   55.166901]  amdgpu_drm_ioctl+0x44/0x78 [amdgpu]
>>>> <4>[   55.166931]  do_vfs_ioctl+0x9f/0x618
>>>> <4>[   55.166940]  ksys_ioctl+0x5b/0x88
>>>> <4>[   55.166947]  __x64_sys_ioctl+0x11/0x18
>>>> <4>[   55.166955]  do_syscall_64+0x50/0x168
>>>> <4>[   55.166963]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
>>>> <4>[   55.166969] RIP: 0033:0x7fb34b035fa7
>>>> <4>[   55.166974] Code: 00 00 00 75 0c 48 c7 c0 ff ff ff ff 48 83 c4 18 c3 e8 8d
>>>> dc 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 10 00 00 00 0f 05 <48> 3d
>>>> 01 f0 ff ff 73 01 c3 48 8b 0d a9 ae 0c 00 f7 d8 64 89 01 48
>>>> <4>[   55.166978] RSP: 002b:00007fb327ffea88 EFLAGS: 00000246 ORIG_RAX:
>>>> 0000000000000010
>>>> <4>[   55.166984] RAX: ffffffffffffffda RBX: 00007fb327ffec58 RCX: 00007fb34b035fa7
>>>> <4>[   55.166987] RDX: 00007fb327ffeb10 RSI: 00000000c0186444 RDI:
>>>> 0000000000000010
>>>> <4>[   55.166991] RBP: 00007fb327ffeb10 R08: 00007fb327ffec80 R09:
>>>> 00007fb327ffec58
>>>> <4>[   55.166995] R10: 00007fb327ffeca0 R11: 0000000000000246 R12:
>>>> 00000000c0186444
>>>> <4>[   55.166998] R13: 0000000000000010 R14: 000055ecd2705dc0 R15:
>>>> 0000000000000003
>>>> <4>[   55.167004] Modules linked in: rfcomm nf_tables ebtable_nat ip_set
>>>> nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables overlay squashfs
>>>> loop bnep ipv6 rtsx_usb_ms memstick rtsx_usb_sdmmc rtsx_usb uvcvideo
>>>> videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev
>>>> media ath3k btusb btintel bluetooth ecdh_generic ath9k ath9k_common kvm_amd
>>>> ath9k_hw sdhci_pci kvm cqhci irqbypass mac80211 sdhci crc32_pclmul
>>>> ghash_clmulni_intel ath serio_raw mmc_core cfg80211 amdgpu mfd_core chash
>>>> gpu_sched xhci_pci ttm xhci_hcd ehci_pci ehci_hcd sp5100_tco
>>>> <4>[   55.167063] CR2: 0000000000000208
>>>> <4>[   55.167069] ---[ end trace bf1c4be089002236 ]---
>>>>
>>>> Bisected, and  it seems that the bad commit is "drm/amdgpu: cleanup setting
>>>> bulk_movable". I hope this is relevant.
>>>>
>>>> full git bisect log:
>>>>
>>>> git bisect start
>>>> # good: [10117450735c7a7c0858095fb46a860e7037cb9a] drm/amd/display: add -msse2
>>>> to prevent Clang from emitting libcalls to undefined SW FP routines
>>>> git bisect good 10117450735c7a7c0858095fb46a860e7037cb9a
>>>> # bad: [b9c6252b7f980e7e03c0bf659a251798b36a8094] Revert "drm/amd/display: add
>>>> -msse2 to prevent Clang from emitting libcalls to undefined SW FP routines"
>>>> git bisect bad b9c6252b7f980e7e03c0bf659a251798b36a8094
>>>> # good: [1de29da5b7281c9a8427d84948bf3d77bc4b8d16] drm: disable uncached DMA
>>>> optimization for ARM and arm64
>>>> git bisect good 1de29da5b7281c9a8427d84948bf3d77bc4b8d16
>>>> # good: [bbf48cae572b39c4df6023b01d6f8de66ef41b34] Revert "test patch for hpd
>>>> dpms check"
>>>> git bisect good bbf48cae572b39c4df6023b01d6f8de66ef41b34
>>>> # good: [257b75d373c77d6792d0011f7379398ba60799ec] drm/amdgpu: Show XGMI node
>>>> and hive message per device only once
>>>> git bisect good 257b75d373c77d6792d0011f7379398ba60799ec
>>>> # good: [4d771657c533d8fe3b574c561084f66aebc77bb6] drm/amdgpu: cleanup
>>>> amdgpu_pte_update_params
>>>> git bisect good 4d771657c533d8fe3b574c561084f66aebc77bb6
>>>> # bad: [4ef27005fefd4be102010b7d8552fec1ee13435a] drm/amdgpu: cleanup setting
>>>> bulk_movable
>>>> git bisect bad 4ef27005fefd4be102010b7d8552fec1ee13435a
>>>> # first bad commit: [4ef27005fefd4be102010b7d8552fec1ee13435a] drm/amdgpu:
>>>> cleanup setting bulk_movable
>>>>
>>>> 4ef27005fefd4be102010b7d8552fec1ee13435a is the first bad commit
>>>> commit 4ef27005fefd4be102010b7d8552fec1ee13435a
>>>> Author: Christian König<christian.koenig at amd.com>
>>>> Date:   Mon Jan 28 13:41:58 2019 +0100
>>>>
>>>>      drm/amdgpu: cleanup setting bulk_movable
>>>>      
>>>>      We only need to set this to false now when BOs are removed from the LRU.
>>>>      
>>>>      Signed-off-by: Christian König<christian.koenig at amd.com>
>>>>      Reviewed-by: Chunming Zhou<david1.zhou at amd.com>
>>>>
>>>> If other info is needed, please do not hesitate.
>>>>
>>>> Thanks,
>>>> Przemek.
>>>>
>>>> _______________________________________________
>>>> amd-gfx mailing list
>>>> amd-gfx at lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>>
>>
> 
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