FYI, we noticed the following commit (built with gcc-7):
commit: bd61431ef20403f30510ecb4b9263a4894e357d8 ("[PATCH] drm: plane: Verify that no or all planes have a zpos property") url: https://github.com/0day-ci/linux/commits/Laurent-Pinchart/drm-plane-Verify-t... base: https://git.kernel.org/cgit/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------------------------------+------------+------------+ | | e2ed135564 | bd61431ef2 | +---------------------------------------------------------------------+------------+------------+ | boot_successes | 4 | 0 | | boot_failures | 0 | 4 | | WARNING:at_drivers/gpu/drm/drm_plane.c:#drm_plane_register_all[drm] | 0 | 4 | | RIP:drm_plane_register_all[drm] | 0 | 4 | +---------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag Reported-by: kernel test robot lkp@intel.com
[ 17.466582] WARNING: CPU: 0 PID: 310 at drivers/gpu/drm/drm_plane.c:309 drm_plane_register_all+0x9d/0xb0 [drm] [ 17.467701] Modules linked in: parport_pc(+) parport bochs_drm(+) drm_vram_helper drm_ttm_helper ttm drm_kms_helper drm qemu_fw_cfg virtio_scsi joydev i2c_piix4 [ 17.469413] CPU: 0 PID: 310 Comm: modprobe Not tainted 5.6.0-rc5-01148-gbd61431ef2040 #1 [ 17.470188] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 17.470978] RIP: 0010:drm_plane_register_all+0x9d/0xb0 [drm] [ 17.471513] Code: ec 74 29 49 8b 7e 18 48 8b 5f 50 48 85 db 75 03 48 8b 1f e8 c5 fa 50 cf 48 89 da 48 89 c6 48 c7 c7 b0 3e 1e c0 e8 43 b9 f2 ce <0f> 0b 5b 31 c0 5d 41 5c 41 5d 41 5e c3 66 0f 1f 44 00 00 66 66 66 [ 17.473966] RSP: 0018:ffffae9340253a68 EFLAGS: 00010282 [ 17.474464] RAX: 0000000000000000 RBX: ffff95b5e9e2b8f0 RCX: ffffffff90654ae8 [ 17.475104] RDX: 0000000000000001 RSI: 0000000000000092 RDI: 0000000000000246 [ 17.475745] RBP: 0000000000000001 R08: 00000000000002df R09: 0720072007200720 [ 17.476389] R10: 0000000000000000 R11: 0720072007200720 R12: 0000000000000000 [ 17.477037] R13: ffff95b5a6ed22d0 R14: ffff95b5a6ed2000 R15: ffff95b5a7070fe0 [ 17.477925] FS: 00007f1c4af79700(0000) GS:ffff95b5ffc00000(0000) knlGS:0000000000000000 [ 17.479212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.480013] CR2: 00007f4ca04bdb98 CR3: 00000001e9ea8000 CR4: 00000000000406f0 [ 17.481042] Call Trace: [ 17.481410] drm_modeset_register_all+0x12/0x80 [drm] [ 17.482114] drm_dev_register+0x143/0x1a0 [drm] [ 17.482742] bochs_pci_probe+0x118/0x150 [bochs_drm] [ 17.483411] local_pci_probe+0x42/0x90 [ 17.483936] ? _cond_resched+0x19/0x30 [ 17.484443] pci_device_probe+0x10b/0x1c0 [ 17.485108] really_probe+0xef/0x430 [ 17.485598] driver_probe_device+0x110/0x120 [ 17.494367] device_driver_attach+0x4f/0x60 [ 17.495127] __driver_attach+0x9a/0x140 [ 17.495818] ? device_driver_attach+0x60/0x60 [ 17.496590] bus_for_each_dev+0x76/0xc0 [ 17.497281] ? klist_add_tail+0x3b/0x70 [ 17.497979] bus_add_driver+0x144/0x220 [ 17.498484] ? 0xffffffffc0165000 [ 17.498925] driver_register+0x5b/0xf0 [ 17.499417] ? 0xffffffffc0165000 [ 17.499851] do_one_initcall+0x46/0x220 [ 17.500345] ? free_unref_page_commit+0x9f/0x120 [ 17.500938] ? _cond_resched+0x19/0x30 [ 17.501446] ? kmem_cache_alloc_trace+0x3b/0x240 [ 17.502224] do_init_module+0x5b/0x21d [ 17.502883] load_module+0x2650/0x2b20 [ 17.503566] ? __do_sys_init_module+0x17d/0x1b0 [ 17.504389] __do_sys_init_module+0x17d/0x1b0 [ 17.505161] do_syscall_64+0x5b/0x1e0 [ 17.505875] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 17.507032] RIP: 0033:0x7f1c4aa92bca [ 17.507779] Code: 48 8b 0d 79 32 2c 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 90 90 90 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 46 32 2c 00 31 d2 48 29 c2 64 [ 17.511244] RSP: 002b:00007ffdb2035d28 EFLAGS: 00000246 ORIG_RAX: 00000000000000af [ 17.512685] RAX: ffffffffffffffda RBX: 000000000251c430 RCX: 00007f1c4aa92bca [ 17.514057] RDX: 000000000251e400 RSI: 0000000000046be9 RDI: 00007f1c4af31000 [ 17.515215] RBP: 000000000251e400 R08: 00000000ffffffff R09: 0000000000000001 [ 17.516197] R10: 00007f1c4aa85100 R11: 0000000000000246 R12: 000000000251c150 [ 17.517151] R13: 000000000251e670 R14: 0000000000000000 R15: 000000000251c448 [ 17.518278] ---[ end trace 4955140d38c871de ]---
To reproduce:
# build kernel cd linux cp config-5.6.0-rc5-01148-gbd61431ef2040 .config make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks, lkp