https://bugzilla.kernel.org/show_bug.cgi?id=210841 Bug ID: 210841 Summary: divide error in Calculate256BBlockSizes Product: Drivers Version: 2.5 Kernel Version: 5.9.14 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: nshepperd@xxxxxxxxx Regression: No Created attachment 294287 --> https://bugzilla.kernel.org/attachment.cgi?id=294287&action=edit Full kernel log from journalctl -b-1 -k display crashed with this error message: divide error: 0000 [#1] PREEMPT SMP NOPTI This looks superficially similar to https://bugzilla.kernel.org/show_bug.cgi?id=206987 or https://bugzilla.kernel.org/show_bug.cgi?id=207979; but my kernel version has the patch that should prevent this, and the crash also seems to be in a different place. RIP: 0010:Calculate256BBlockSizes+0x74/0x100 [amdgpu] objdump -d amdgpu.ko 00000000002423d0 <Calculate256BBlockSizes>: 2423d0: e8 00 00 00 00 callq 2423d5 <Calculate256BBlockSizes+0x5> 2423d5: 89 f0 mov %esi,%eax 2423d7: 4c 8b 5c 24 10 mov 0x10(%rsp),%r11 2423dc: 89 d6 mov %edx,%esi 2423de: 41 89 ca mov %ecx,%r10d 2423e1: 83 ff 02 cmp $0x2,%edi 2423e4: 76 47 jbe 24242d <Calculate256BBlockSizes+0x5d> 2423e6: 83 ff 08 cmp $0x8,%edi 2423e9: 74 42 je 24242d <Calculate256BBlockSizes+0x5d> 2423eb: 85 c0 test %eax,%eax 2423ed: 0f 85 8a 00 00 00 jne 24247d <Calculate256BBlockSizes+0xad> 2423f3: 41 c7 00 01 00 00 00 movl $0x1,(%r8) 2423fa: 41 c7 01 01 00 00 00 movl $0x1,(%r9) 242401: b9 00 01 00 00 mov $0x100,%ecx 242406: 31 d2 xor %edx,%edx 242408: 89 c8 mov %ecx,%eax 24240a: f7 f6 div %esi 24240c: 31 d2 xor %edx,%edx 24240e: 41 f7 30 divl (%r8) 242411: 48 8b 54 24 08 mov 0x8(%rsp),%rdx 242416: 89 02 mov %eax,(%rdx) 242418: 89 c8 mov %ecx,%eax 24241a: 31 d2 xor %edx,%edx 24241c: 41 f7 f2 div %r10d 24241f: 31 d2 xor %edx,%edx 242421: 41 f7 31 divl (%r9) 242424: 41 89 03 mov %eax,(%r11) 242427: b8 01 00 00 00 mov $0x1,%eax 24242c: c3 retq 24242d: 85 c0 test %eax,%eax 24242f: 75 34 jne 242465 <Calculate256BBlockSizes+0x95> 242431: 41 c7 00 01 00 00 00 movl $0x1,(%r8) 242438: b9 01 00 00 00 mov $0x1,%ecx 24243d: 31 d2 xor %edx,%edx 24243f: b8 00 01 00 00 mov $0x100,%eax 242444: f7 f6 div %esi <-- [Calculate256BBlockSizes+0x74] 242446: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 24244b: 31 d2 xor %edx,%edx 24244d: f7 f1 div %ecx So the crash is a div instruction. I think corresponding to either the 256 / BytePerPixelY or 256 / BytePerPixelC in Calculate256BBlockSizes. So it seems that one of those is being passed in as 0 from dml21_ModeSupportAndSystemConfigurationFull? -- [Dec22 16:25] divide error: 0000 [#1] PREEMPT SMP NOPTI [ +0.000008] CPU: 9 PID: 842 Comm: Xorg Tainted: G W 5.9.14-arch1-1 #1 [ +0.000003] Hardware name: LENOVO 20UHCTO1WW/20UHCTO1WW, BIOS R1CET56W(1.25 ) 09/15/2020 [ +0.000182] RIP: 0010:Calculate256BBlockSizes+0x74/0x100 [amdgpu] [ +0.000006] Code: 31 d2 41 f7 f2 31 d2 41 f7 31 41 89 03 b8 01 00 00 00 c3 85 c0 75 34 41 c7 00 01 00 00 00 b9 01 00 00 00 31 d2 b8 00 01 00 00 <f7> f6 48 8b 74 24 08 31 d2 f7 f1 89 06 b8 01 00 00 00 41 c7 01 00 [ +0.000003] RSP: 0018:ffffa9d3c195b650 EFLAGS: 00010246 [ +0.000003] RAX: 0000000000000100 RBX: ffff8ea85cba31c8 RCX: 0000000000000008 [ +0.000002] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ +0.000002] RBP: 0000000000000000 R08: ffff8ea85cba9914 R09: ffff8ea85cba9954 [ +0.000001] R10: 0000000000000000 R11: ffff8ea85cba9974 R12: ffff8ea85cba9914 [ +0.000002] R13: 0000000000000000 R14: ffff8ea85cba2830 R15: ffff8ea85cba2090 [ +0.000003] FS: 00007f4289f3a2c0(0000) GS:ffff8eab3fa40000(0000) knlGS:0000000000000000 [ +0.000002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000002] CR2: 00007f80bc2da000 CR3: 00000003ea4fc000 CR4: 0000000000350ee0 [ +0.000002] Call Trace: [ +0.000100] dml21_ModeSupportAndSystemConfigurationFull+0x1109/0x5d10 [amdgpu] [ +0.000005] ? sugov_fast_switch+0x5b/0xe0 [ +0.000002] ? update_load_avg+0x62d/0x660 [ +0.000001] ? update_curr+0x73/0x1f0 [ +0.000002] ? dequeue_entity+0xa4/0x440 [ +0.000001] ? newidle_balance+0xec/0x400 [ +0.000001] ? preempt_count_add+0x49/0xa0 [ +0.000003] ? kernel_init_free_pages+0x6d/0x90 [ +0.000001] ? prep_new_page+0xa2/0xb0 [ +0.000001] ? get_page_from_freelist+0x11e0/0x12d0 [ +0.000002] ? __mod_zone_page_state+0x66/0xa0 [ +0.000002] ? __free_one_page+0x58/0x3d0 [ +0.000001] ? __mod_zone_page_state+0x66/0xa0 [ +0.000000] ? preempt_count_add+0x49/0xa0 [ +0.000002] ? kernel_init_free_pages+0x6d/0x90 [ +0.000001] ? prep_new_page+0xa2/0xb0 [ +0.000001] ? get_page_from_freelist+0x11e0/0x12d0 [ +0.000058] dml_get_voltage_level+0x138/0x1d0 [amdgpu] [ +0.000062] dcn20_fast_validate_bw+0x359/0x670 [amdgpu] [ +0.000057] ? dcn21_validate_bandwidth+0x95/0x2b0 [amdgpu] [ +0.000056] dcn21_validate_bandwidth+0xd3/0x2b0 [amdgpu] [ +0.000055] dc_validate_global_state+0x2f2/0x390 [amdgpu] [ +0.000060] amdgpu_dm_atomic_check+0xf05/0x1080 [amdgpu] [ +0.000016] drm_atomic_check_only+0x57c/0x7f0 [drm] [ +0.000011] ? drm_mode_object_put.part.0+0x1f/0x50 [drm] [ +0.000009] ? drm_atomic_set_property+0x8e/0xae0 [drm] [ +0.000009] drm_atomic_commit+0x13/0x50 [drm] [ +0.000009] drm_mode_obj_set_property_ioctl+0x156/0x3d0 [drm] [ +0.000009] ? drm_mode_obj_find_prop_id+0x40/0x40 [drm] [ +0.000008] drm_ioctl_kernel+0xb2/0x100 [drm] [ +0.000009] drm_ioctl+0x215/0x390 [drm] [ +0.000009] ? drm_mode_obj_find_prop_id+0x40/0x40 [drm] [ +0.000043] amdgpu_drm_ioctl+0x49/0x80 [amdgpu] [ +0.000004] __x64_sys_ioctl+0x83/0xb0 [ +0.000003] do_syscall_64+0x33/0x40 [ +0.000002] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ +0.000002] RIP: 0033:0x7f428a901f6b [ +0.000001] Code: 89 d8 49 8d 3c 1c 48 f7 d8 49 39 c4 72 b5 e8 1c ff ff ff 85 c0 78 ba 4c 89 e0 5b 5d 41 5c c3 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d5 ae 0c 00 f7 d8 64 89 01 48 [ +0.000001] RSP: 002b:00007ffd2caa5758 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ +0.000001] RAX: ffffffffffffffda RBX: 00007ffd2caa5790 RCX: 00007f428a901f6b [ +0.000000] RDX: 00007ffd2caa5790 RSI: 00000000c01864ba RDI: 000000000000000d [ +0.000001] RBP: 00000000c01864ba R08: 000000000000006a R09: 00000000cccccccc [ +0.000001] R10: 0000000000000fff R11: 0000000000000246 R12: 00005611da332f60 [ +0.000000] R13: 000000000000000d R14: 0000000000000000 R15: 0000000000000003 [ +0.000002] Modules linked in: iptable_mangle iptable_raw xt_connmark nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_mark ip6table_mangle xt_comment xt_addrtype ip6table_raw ip6_tables wireguard curve25519_x86_64 libchacha20poly1305 chacha_x86_64 poly1305_x86_64 libblake2s blake2s_x86_64 ip6_udp_tunnel udp_tunnel libcurve25519_generic libchacha libblake2s_generic uas usb_storage uinput rfcomm 8021q garp mrp stp llc joydev mousedev snd_soc_dmic snd_acp3x_pdm_dma snd_acp3x_rn ccm bnep snd_soc_core algif_aead snd_compress des_generic tps6598x ac97_bus libdes snd_pcm_dmaengine roles wmi_bmof ecb algif_skcipher amdgpu snd_hda_codec_realtek iwlmvm cmac snd_hda_codec_generic md4 algif_hash edac_mce_amd snd_hda_codec_hdmi af_alg kvm_amd snd_hda_intel snd_intel_dspcfg kvm mac80211 snd_hda_codec btusb irqbypass btrtl rapl libarc4 uvcvideo btbcm snd_hda_core btintel gpu_sched snd_hwdep i2c_algo_bit pcspkr videobuf2_vmalloc thinkpad_acpi ttm videobuf2_memops psmouse input_leds iwlwifi snd_pcm [ +0.000027] videobuf2_v4l2 ext4 bluetooth drm_kms_helper nvram videobuf2_common k10temp r8169 cec snd_timer ecdh_generic mbcache ledtrig_audio sp5100_tco ecc realtek jbd2 i2c_piix4 tpm_crb crc16 rc_core cfg80211 videodev snd_rn_pci_acp3x mdio_devres snd syscopyarea sysfillrect of_mdio sysimgblt snd_pci_acp3x fb_sys_fops soundcore ucsi_acpi fixed_phy mc tpm_tis ipmi_devintf libphy rfkill ac battery ipmi_msghandler typec_ucsi i2c_scmi evdev mac_hid i2c_multi_instantiate typec tpm_tis_core wmi acpi_cpufreq pinctrl_amd drm pkcs8_key_parser crypto_user fuse agpgart ip_tables x_tables dm_crypt cbc encrypted_keys dm_mod trusted tpm rtsx_pci_sdmmc serio_raw mmc_core atkbd libps2 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd glue_helper ccp xhci_pci xhci_pci_renesas rng_core xhci_hcd ehci_pci rtsx_pci ehci_hcd i8042 serio btrfs blake2b_generic libcrc32c crc32c_generic crc32c_intel xor raid6_pq [ +0.000050] ---[ end trace a3da0200bd831ed5 ]--- [ +0.000058] RIP: 0010:Calculate256BBlockSizes+0x74/0x100 [amdgpu] [ +0.000027] Code: 31 d2 41 f7 f2 31 d2 41 f7 31 41 89 03 b8 01 00 00 00 c3 85 c0 75 34 41 c7 00 01 00 00 00 b9 01 00 00 00 31 d2 b8 00 01 00 00 <f7> f6 48 8b 74 24 08 31 d2 f7 f1 89 06 b8 01 00 00 00 41 c7 01 00 [ +0.000000] RSP: 0018:ffffa9d3c195b650 EFLAGS: 00010246 [ +0.000001] RAX: 0000000000000100 RBX: ffff8ea85cba31c8 RCX: 0000000000000008 [ +0.000001] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ +0.000000] RBP: 0000000000000000 R08: ffff8ea85cba9914 R09: ffff8ea85cba9954 [ +0.000001] R10: 0000000000000000 R11: ffff8ea85cba9974 R12: ffff8ea85cba9914 [ +0.000001] R13: 0000000000000000 R14: ffff8ea85cba2830 R15: ffff8ea85cba2090 [ +0.000001] FS: 00007f4289f3a2c0(0000) GS:ffff8eab3fa40000(0000) knlGS:0000000000000000 [ +0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000001] CR2: 00007f80bc2da000 CR3: 00000003ea4fc000 CR4: 0000000000350ee0 -- You may reply to this email to add a comment. 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