Bug 111942

Summary: [CI][SHARDS] igt@gem_tiling_max_stride - dmesg-warn - BUG: kernel NULL pointer dereference, address: 0000000000000019
Product: DRI Reporter: Lakshmi <lakshminarayana.vudum>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: RESOLVED WORKSFORME QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: TGL i915 features: GEM/Other

Description Lakshmi 2019-10-09 17:37:20 UTC
https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5215/shard-tglb6/igt@gem_tiling_max_stride.html
<1> [282.114574] BUG: kernel NULL pointer dereference, address: 0000000000000019
<1> [282.114578] #PF: supervisor read access in kernel mode
<1> [282.114581] #PF: error_code(0x0000) - not-present page
<6> [282.114585] PGD 0 P4D 0 
<4> [282.114589] Oops: 0000 [#1] PREEMPT SMP NOPTI
<4> [282.114591] CPU: 3 PID: 2296 Comm: kworker/u16:14 Tainted: G     U            5.4.0-rc1-CI-CI_DRM_7020+ #1
<4> [282.114594] Hardware name: Intel Corporation Tiger Lake Client Platform/TigerLake U DDR4 SODIMM RVP, BIOS TGLSFWI1.R00.2321.A08.1909162051 09/16/2019
<4> [282.114600] Workqueue: writeback wb_workfn (flush-259:0)
<4> [282.114606] RIP: 0010:__lock_acquire+0x509/0x15d0
<4> [282.114608] Code: 00 45 31 ff 48 8b 7c 24 40 65 48 33 3c 25 28 00 00 00 44 89 f8 0f 85 dd 0f 00 00 48 83 c4 48 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <48> 81 3f 20 8a 83 82 41 bf 00 00 00 00 45 0f 45 f8 83 fe 01 0f 87
<4> [282.114613] RSP: 0018:ffffc9000061bc68 EFLAGS: 00010002
<4> [282.114628] RAX: 0000000000000000 RBX: 0000000000000019 RCX: 0000000000000000
<4> [282.114629] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000019
<4> [282.114631] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
<4> [282.114633] R10: 0000000000000000 R11: 0000000000000019 R12: 0000000000000000
<4> [282.114635] R13: 0000000000000000 R14: ffff88848d014040 R15: 0000000000000001
<4> [282.114636] FS:  0000000000000000(0000) GS:ffff8884a0580000(0000) knlGS:0000000000000000
<4> [282.114639] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [282.114640] CR2: 0000000000000019 CR3: 0000000005210003 CR4: 0000000000760ee0
<4> [282.114642] PKRU: 55555554
<4> [282.114643] Call Trace:
<4> [282.114646]  ? mark_held_locks+0x49/0x70
<4> [282.114649]  ? trace_hardirqs_on_thunk+0x1a/0x20
<4> [282.114660]  ? lockdep_hardirqs_on+0xe3/0x1c0
<4> [282.114662]  lock_acquire+0xa7/0x1c0
<4> [282.114665]  ? __wake_up_common_lock+0x5c/0xb0
<4> [282.114671]  ? retint_kernel+0x2b/0x2b
<4> [282.114673]  _raw_spin_lock_irqsave+0x33/0x50
<4> [282.114675]  ? __wake_up_common_lock+0x5c/0xb0
<4> [282.114677]  __wake_up_common_lock+0x5c/0xb0
<4> [282.114679]  wb_workfn+0xaa/0x5d0
<4> [282.114683]  ? process_one_work+0x1de/0x620
<4> [282.114685]  process_one_work+0x26a/0x620
<4> [282.114689]  worker_thread+0x37/0x380
<4> [282.114691]  ? process_one_work+0x620/0x620
<4> [282.114694]  kthread+0x119/0x130
<4> [282.114695]  ? kthread_park+0x80/0x80
<4> [282.114697]  ret_from_fork+0x24/0x50
<4> [282.114699] Modules linked in: vgem i915 mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pclmul ax88179_178a crc32_pclmul usbnet mii ghash_clmulni_intel mei_me mei prime_numbers
<0> [282.114709] Dumping ftrace buffer:
<0> [282.114717] ---------------------------------
<0> [282.114918] CPU:7 [LOST 21215 EVENTS]
Comment 1 CI Bug Log 2019-10-09 17:37:55 UTC
The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* TGL: igt@gem_tiling_max_stride - dmesg-warn - BUG: kernel NULL pointer dereference, address: 0000000000000019
  - https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5215/shard-tglb6/igt@gem_tiling_max_stride.html
Comment 2 Francesco Balestrieri 2019-10-10 05:57:20 UTC
Seen once in 40 runs. Setting to medium for now.
Comment 3 Francesco Balestrieri 2019-11-06 05:13:13 UTC
Seen once in a month, closing.

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