https://bugzilla.kernel.org/show_bug.cgi?id=210543

Bug ID: 210543 Summary: amdgpu Kernel panic：__ttm_dma_free_page.isra.0+0xac/0xe8 [ttm] Product: Drivers Version: 2.5 Kernel Version: 4.19 Hardware: ARM OS: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: acyellow@gmail.com Regression: No

When start 16 Android VM to do Android App Monkey test, Linux kernel panic happens which causes the computer restart. It seems AMDGPU related issue.

GPU device： 0007:01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 67c7

2020-11-19 17:23:35 [ 1483.496680] pstate: 40400009 (nZcv daif +PAN -UAO) 2020-11-19 17:23:35 [ 1483.496687] pc : kfree+0x78/0x1a8 2020-11-19 17:23:35 [ 1483.496697] lr : __ttm_dma_free_page.isra.0+0xac/0xe8 [ttm] 2020-11-19 17:23:35 [ 1483.496697] sp : ffff00001f9138d0 2020-11-19 17:23:35 [ 1483.496698] x29: ffff00001f9138d0 x28: 0000000000000008 2020-11-19 17:23:35 [ 1483.496699] x27: 0000000000000000 x26: ffffc003e1d69d48 2020-11-19 17:23:35 [ 1483.496700] x25: 0000000000000001 x24: 0000000000001000 2020-11-19 17:23:35 [ 1483.496701] x23: ffff8000398340b0 x22: 00000000635f8000 2020-11-19 17:23:35 [ 1483.496702] x21: ffff0000026c9c94 x20: ffff000156085000 2020-11-19 17:23:35 [ 1483.496703] x19: ffff87ff8433fb80 x18: 0000000000000000 2020-11-19 17:23:35 [ 1483.496703] x17: 0000000000000000 x16: 0000000000000000 2020-11-19 17:23:35 [ 1483.496704] x15: 0000000000000000 x14: 0000000000000000 2020-11-19 17:23:35 [ 1483.496704] x13: 0000000000000000 x12: 0000000000000000 2020-11-19 17:23:35 [ 1483.496705] x11: 0000000000000040 x10: ffffc00359470638 2020-11-19 17:23:35 [ 1483.496705] x9 : ffff0000026c9c94 x8 : 0000000000210d00 2020-11-19 17:23:35 [ 1483.496706] x7 : ffffc004e28d4fe0 x6 : ffff7e1ffe10cfc0 2020-11-19 17:23:35 [ 1483.496707] x5 : 0000000000000019 x4 : ffff7e20029703c0 2020-11-19 17:23:35 [ 1483.496708] x3 : ffff88046b5f8d78 x2 : ffff00001f9138d0 2020-11-19 17:23:35 [ 1483.496709] x1 : 000088046286b000 x0 : ffffc004e28d4e78 2020-11-19 17:23:35 [ 1483.496710] Call trace: 2020-11-19 17:23:35 [ 1483.496712] kfree+0x78/0x1a8 2020-11-19 17:23:35 [ 1483.496715] __ttm_dma_free_page.isra.0+0xac/0xe8 [ttm] 2020-11-19 17:23:35 [ 1483.496719] ttm_dma_page_put+0x5c/0x68 [ttm] 2020-11-19 17:23:35 [ 1483.496722] ttm_dma_unpopulate+0x1f8/0x400 [ttm] 2020-11-19 17:23:35 [ 1483.496804] amdgpu_ttm_tt_unpopulate+0x70/0xa0 [amdgpu] 2020-11-19 17:23:35 [ 1483.496814] ttm_tt_unpopulate+0x6c/0x88 [ttm] 2020-11-19 17:23:35 [ 1483.909262] ttm_tt_destroy.part.0+0x64/0x68 [ttm] 2020-11-19 17:23:35 [ 1483.909266] ttm_tt_destroy+0x18/0x28 [ttm] 2020-11-19 17:23:35 [ 1483.909269] ttm_bo_cleanup_memtype_use+0x3c/0x90 [ttm] 2020-11-19 17:23:35 [ 1483.909272] ttm_bo_cleanup_refs_or_queue+0x1c8/0x200 [ttm] 2020-11-19 17:23:35 [ 1483.909275] ttm_bo_put+0x80/0xb8 [ttm] 2020-11-19 17:23:35 [ 1483.909345] amdgpu_bo_unref+0x28/0x38 [amdgpu] 2020-11-19 17:23:35 [ 1483.909406] amdgpu_gem_object_free+0x3c/0x60 [amdgpu]