Hi Am 05.02.20 um 16:39 schrieb Alex Deucher: > These are deprecated and the drm will soon start warning when drivers still > use them. It was a long and twisty road, but seems to work. > > v2: Add additional patch (13/15) which should fix the crash reported by > Thomas Zimmermann. I tried again, but there's still a bug. [ 10.976846] ================================================================== [ 10.984099] BUG: KASAN: null-ptr-deref in drm_dp_aux_register+0xcc/0xf0 [ 10.990705] Read of size 8 at addr 0000000000000050 by task systemd-udevd/385 [ 10.997828] [ 11.000633] ================================================================== [ 11.007889] BUG: kernel NULL pointer dereference, address: 0000000000000050 [ 11.014836] #PF: supervisor read access in kernel mode [ 11.019962] #PF: error_code(0x0000) - not-present page [ 11.025087] PGD 0 P4D 0 [ 11.027614] Oops: 0000 [#1] SMP KASAN PTI [ 11.031614] CPU: 5 PID: 385 Comm: systemd-udevd Tainted: G B E 5.5.0-1-default+ #235 [ 11.040464] Hardware name: Dell Inc. OptiPlex 9020/0N4YC8, BIOS A24 10/24/2018 [ 11.047671] RIP: 0010:drm_dp_aux_register+0xcc/0xf0 [ 11.052536] Code: 41 5c c3 4c 89 e7 e8 53 b4 28 00 85 c0 74 eb 48 89 ef 89 44 24 04 e8 23 1d 02 00 8b 44 24 04 eb d9 48 8d 7b 50 e8 d4 98 8f ff <48> 8b 73 50 48 85 f6 75 aa 48 89 df e8 c3 98 8f ff 48 8b 33 eb 9d [ 11.071266] RSP: 0018:ffffc90000a6f600 EFLAGS: 00010282 [ 11.076480] RAX: ffff8886da438700 RBX: 0000000000000000 RCX: dffffc0000000000 [ 11.083599] RDX: 0000000000000007 RSI: 0000000000000004 RDI: 0000000000000297 [ 11.090716] RBP: ffff8886c0ca8900 R08: ffffffffaf19ec71 R09: fffffbfff6246b5d [ 11.097834] R10: fffffbfff6246b5c R11: ffffffffb1235ae3 R12: ffff8886c0ca8908 [ 11.104953] R13: ffff8886baa0d050 R14: ffff8886baa0d100 R15: ffffffffc0bdb180 [ 11.112073] FS: 00007fcdc3effdc0(0000) GS:ffff8886fc200000(0000) knlGS:0000000000000000 [ 11.120147] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 11.125878] CR2: 0000000000000050 CR3: 00000006da450006 CR4: 00000000001606e0 [ 11.132997] Call Trace: [ 11.135441] drm_connector_register.part.0+0x92/0xe0 [ 11.140396] drm_connector_register_all+0xb9/0x110 [ 11.145178] ? drm_connector_unregister_all+0xc0/0xc0 [ 11.150221] drm_modeset_register_all+0x5b/0x70 [ 11.154742] drm_dev_register+0x1cd/0x210 [ 11.158886] amdgpu_pci_probe+0x142/0x1d0 [amdgpu] [ 11.163809] ? amdgpu_pmops_runtime_idle+0xf0/0xf0 [amdgpu] [ 11.169371] local_pci_probe+0x74/0xc0 [ 11.173115] pci_device_probe+0x1c9/0x2d0 [ 11.177115] ? pci_device_remove+0x180/0x180 [ 11.181378] ? sysfs_do_create_link_sd.isra.0+0x74/0xd0 [ 11.186595] really_probe+0x184/0x530 [ 11.190263] driver_probe_device+0x119/0x180 [ 11.194526] device_driver_attach+0x87/0x90 [ 11.198701] ? device_driver_attach+0x90/0x90 [ 11.203049] __driver_attach+0xb0/0x1a0 [ 11.206877] ? device_driver_attach+0x90/0x90 [ 11.211226] bus_for_each_dev+0xdd/0x120 [ 11.215141] ? subsys_dev_iter_exit+0x10/0x10 [ 11.219493] bus_add_driver+0x22c/0x2e0 [ 11.223321] driver_register+0xd8/0x160 [ 11.227148] ? 0xffffffffc0d8f000 [ 11.230456] do_one_initcall+0xbd/0x3c0 [ 11.234283] ? trace_event_raw_event_initcall_finish+0x120/0x120 [ 11.240275] ? rcu_read_lock_sched_held+0x85/0x90 [ 11.244970] ? rcu_read_lock_bh_held+0xa0/0xa0 [ 11.249404] ? debug_lockdep_rcu_enabled.part.0+0x16/0x30 [ 11.254792] ? kmem_cache_alloc_trace+0x51e/0x6b0 [ 11.259487] ? kasan_unpoison_shadow+0x33/0x40 [ 11.263924] do_init_module+0xfd/0x390 [ 11.267664] load_module+0x255b/0x2910 [ 11.271415] ? layout_and_allocate+0x850/0x850 [ 11.275849] ? ima_post_read_file+0x141/0x150 [ 11.280197] ? ima_read_file+0x10/0x10 [ 11.283938] ? kernel_read+0x9b/0xc0 [ 11.287513] ? __do_sys_finit_module+0x110/0x180 [ 11.292122] __do_sys_finit_module+0x110/0x180 [ 11.296558] ? __ia32_sys_init_module+0x40/0x40 [ 11.301088] ? lockdep_hardirqs_off+0xbe/0x100 [ 11.305523] ? mark_held_locks+0x23/0xa0 [ 11.309438] ? do_syscall_64+0x14/0x2f0 [ 11.313267] do_syscall_64+0x72/0x2f0 [ 11.316921] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 11.321960] RIP: 0033:0x7fcdc4b60059 [ 11.325528] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d f7 5d 0c 00 f7 d8 64 89 01 48 [ 11.344260] RSP: 002b:00007ffc3abc6008 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 11.351815] RAX: ffffffffffffffda RBX: 0000564c25e0fb30 RCX: 00007fcdc4b60059 [ 11.358934] RDX: 0000000000000000 RSI: 00007fcdc47a989d RDI: 0000000000000010 [ 11.366050] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000564c25e0f380 [ 11.373169] R10: 0000000000000010 R11: 0000000000000246 R12: 00007fcdc47a989d [ 11.380289] R13: 0000000000000000 R14: 0000564c25e42910 R15: 0000564c25e0fb30 [ 11.387412] Modules linked in: sr_mod(E) crc32c_intel(E) cdrom(E) serio_raw(E) amdgpu(E+) uas(E) usb_storage(E) amd_iommu_v2(E) gpu_sched(E) ttm(E) wmi(E) video(E) sg(E) dm_multipath(E) dm_mod(E) scsi_dh_rdac(E) scsi_dh_emc(E) scsi_dh) [ 11.408846] CR2: 0000000000000050 [ 11.412167] ---[ end trace fc1f8e4f7508319c ]--- [ 11.416798] RIP: 0010:drm_dp_aux_register+0xcc/0xf0 [ 11.421673] Code: 41 5c c3 4c 89 e7 e8 53 b4 28 00 85 c0 74 eb 48 89 ef 89 44 24 04 e8 23 1d 02 00 8b 44 24 04 eb d9 48 8d 7b 50 e8 d4 98 8f ff <48> 8b 73 50 48 85 f6 75 aa 48 89 df e8 c3 98 8f ff 48 8b 33 eb 9d [ 11.440432] RSP: 0018:ffffc90000a6f600 EFLAGS: 00010282 [ 11.445668] RAX: ffff8886da438700 RBX: 0000000000000000 RCX: dffffc0000000000 [ 11.452812] RDX: 0000000000000007 RSI: 0000000000000004 RDI: 0000000000000297 [ 11.459956] RBP: ffff8886c0ca8900 R08: ffffffffaf19ec71 R09: fffffbfff6246b5d [ 11.467100] R10: fffffbfff6246b5c R11: ffffffffb1235ae3 R12: ffff8886c0ca8908 [ 11.474243] R13: ffff8886baa0d050 R14: ffff8886baa0d100 R15: ffffffffc0bdb180 [ 11.481391] FS: 00007fcdc3effdc0(0000) GS:ffff8886fc200000(0000) knlGS:0000000000000000 [ 11.489488] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 11.495244] CR2: 0000000000000050 CR3: 00000006da450006 CR4: 00000000001606e0 Best regards Thomas > > Alex Deucher (15): > drm/amdgpu: rename amdgpu_debugfs_preempt_cleanup > drm/amdgpu/ttm: move debugfs init into core amdgpu debugfs > drm/amdgpu/pm: move debugfs init into core amdgpu debugfs > drm/amdgpu/sa: move debugfs init into core amdgpu debugfs > drm/amdgpu/fence: move debugfs init into core amdgpu debugfs > drm/amdgpu/gem: move debugfs init into core amdgpu debugfs > drm/amdgpu/regs: move debugfs init into core amdgpu debugfs > drm/amdgpu/firmware: move debugfs init into core amdgpu debugfs > drm/amdgpu: don't call drm_connector_register for non-MST ports > drm/amdgpu/display: move debugfs init into core amdgpu debugfs > drm/amd/display: move dpcd debugfs members setup > drm/amdgpu/display: add a late register connector callback > drm/amdgpu/display: split dp connector registration > drm/amdgpu/ring: move debugfs init into core amdgpu debugfs > drm/amdgpu: drop legacy drm load and unload callbacks > > .../gpu/drm/amd/amdgpu/amdgpu_connectors.c | 11 ++- > drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 67 ++++++++++++++++++- > drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.h | 2 +- > drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 17 ----- > drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 13 +++- > drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 3 - > drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 7 +- > drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 1 + > drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 9 +-- > drivers/gpu/drm/amd/amdgpu/amdgpu_pm.h | 2 + > drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 15 +---- > drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 4 ++ > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 14 +--- > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 3 + > drivers/gpu/drm/amd/amdgpu/atombios_dp.c | 8 +-- > drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 1 - > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 26 +++---- > .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 3 + > .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 13 ++-- > 19 files changed, 131 insertions(+), 88 deletions(-) > -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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