I think this might be the same as 914495. On Sat, 2018-12-01 at 17:33 -0800, Bill Brelsford wrote: > I get the same behavior (except at 00000004) with > linux-image-4.18.0-3-686-pae. 4.18.0-2 was ok.
On my system I observed that `modprobe i915` had hung (it was killable and I could try again, but it remained hung), in the dmesg I found a splat at +0x52 in the same function: [ 4.971540] [drm:intel_ctx_workarounds_init [i915]] Number of context specific w/a: 0 [ 4.972175] [drm:i915_gem_contexts_init [i915]] fake context support initialized [ 4.973980] [drm] RC6 disabled, disabling runtime PM support [ 4.974029] [drm:init_ring_common [i915]] rcs0 initialization failed [head=f69d8000], fudging [ 4.974059] BUG: unable to handle kernel NULL pointer dereference at 00000004 [ 4.974065] *pdpt = 000000002c14b001 *pde = 0000000000000000 [ 4.974071] Oops: 0000 [#1] SMP [ 4.974075] CPU: 1 PID: 408 Comm: systemd-udevd Not tainted 4.18.0-3-686-pae #1 Debian 4.18.20-2 [ 4.974078] Hardware name: Gigabyte Technology Co., Ltd. EG45M-DS2H/EG45M-DS2H, BIOS F2 07/18/2008 [ 4.974129] EIP: gen4_render_ring_flush+0x52/0x100 [i915] [ 4.974131] Code: 84 ab 00 00 00 ba 16 00 00 00 89 f0 e8 47 fe ff ff 3d 00 f0 ff ff 77 6b 89 18 c7 40 04 02 40 00 7a 8b 56 44 8b 92 50 01 00 00 <8b> 52 04 c7 40 0c 00 00 00 00 c7 40 10 00 00 00 00 83 ca 04 89 50 [ 4.974167] EAX: f7a80000 EBX: 02000022 ECX: 00000000 EDX: 00000000 [ 4.974170] ESI: ec754a00 EDI: ec29e200 EBP: f692fc88 ESP: f692fc80 [ 4.974173] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010287 [ 4.974176] CR0: 80050033 CR2: 00000004 CR3: 2c1836c0 CR4: 000006f0 [ 4.974180] Call Trace: [ 4.974219] i915_request_alloc+0x21d/0x350 [i915] [ 4.974258] i915_gem_init+0x264/0x440 [i915] [ 4.974290] i915_driver_load+0xa66/0xdd0 [i915] [ 4.974298] ? acpi_dev_found+0x6c/0x80 [ 4.974331] ? i915_pci_remove+0x20/0x20 [i915] [ 4.974364] i915_pci_probe+0x3a/0x70 [i915] [ 4.974369] pci_device_probe+0xc7/0x160 [ 4.974374] driver_probe_device+0x2be/0x460 [ 4.974378] __driver_attach+0xe1/0x110 [ 4.974382] ? driver_probe_device+0x460/0x460 [ 4.974386] bus_for_each_dev+0x5a/0x90 [ 4.974390] driver_attach+0x19/0x20 [ 4.974393] ? driver_probe_device+0x460/0x460 [ 4.974397] bus_add_driver+0x12f/0x230 [ 4.974400] ? pci_bus_num_vf+0x20/0x20 [ 4.974404] driver_register+0x56/0xf0 [ 4.974407] ? 0xf82f8000 [ 4.974411] __pci_register_driver+0x3d/0x40 [ 4.974446] i915_init+0x4b/0x50 [i915] [ 4.974452] do_one_initcall+0x42/0x1a9 [ 4.974457] ? kfree+0x145/0x160 [ 4.974460] ? kfree+0x145/0x160 [ 4.974465] ? _cond_resched+0x17/0x40 [ 4.974469] ? kmem_cache_alloc_trace+0x3b/0x1e0 [ 4.974474] ? do_init_module+0x21/0x1dc [ 4.974477] ? do_init_module+0x21/0x1dc [ 4.974481] do_init_module+0x50/0x1dc [ 4.974486] load_module.constprop.58+0x2054/0x2690 [ 4.974491] sys_finit_module+0x8a/0xe0 [ 4.974496] do_fast_syscall_32+0x7f/0x1b0 [ 4.974500] entry_SYSENTER_32+0x4e/0x7c [ 4.974503] EIP: 0xb7f7bd39 [ 4.974505] Code: 08 8b 80 5c cd ff ff 85 d2 74 02 89 02 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 8b 3c 24 c3 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 [ 4.974542] EAX: ffffffda EBX: 00000011 ECX: 0100e4a0 EDX: 00000000 [ 4.974545] ESI: 00ffc8b0 EDI: 0100d750 EBP: 0000000a ESP: bfd97c3c [ 4.974549] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296 [ 4.974553] Modules linked in: snd_hda_codec_realtek(+) intel_powerclamp(-) snd_hda_codec_generic coretemp kvm_intel dvb_usb_dib0700(+) snd_hda_intel dib7000m kvm dib0090 ppdev i915(+) dib0070 dib3000mc snd_hda_codec irqbypass evdev dibx000_common ir_rc6_decoder dvb_usb snd_hda_core dvb_core rc_rc6_mce serio_raw pcspkr video cp210x snd_hwdep snd_pcm usbserial mceusb(+) sg iTCO_wdt iTCO_vendor_support rc_core drm_kms_helper snd_timer parport_pc parport snd drm soundcore button pcc_cpufreq acpi_cpufreq i2c_algo_bit ext4 crc16 mbcache jbd2 crc32c_generic fscrypto ecb crypto_simd cryptd aes_i586 sr_mod cdrom sd_mod ata_generic pata_it8213 ata_piix firewire_ohci firewire_core crc_itu_t i2c_i801 libata scsi_mod lpc_ich r8169 mii ehci_pci uhci_hcd ehci_hcd usbcore usb_common [ 4.974615] CR2: 0000000000000004 [ 4.974618] ---[ end trace 5620155027e66da5 ]--- [ 4.974667] EIP: gen4_render_ring_flush+0x52/0x100 [i915] [ 4.974670] Code: 84 ab 00 00 00 ba 16 00 00 00 89 f0 e8 47 fe ff ff 3d 00 f0 ff ff 77 6b 89 18 c7 40 04 02 40 00 7a 8b 56 44 8b 92 50 01 00 00 <8b> 52 04 c7 40 0c 00 00 00 00 c7 40 10 00 00 00 00 83 ca 04 89 50 [ 4.974706] EAX: f7a80000 EBX: 02000022 ECX: 00000000 EDX: 00000000 [ 4.974615] CR2: 0000000000000004 [ 4.974618] ---[ end trace 5620155027e66da5 ]--- [ 4.974667] EIP: gen4_render_ring_flush+0x52/0x100 [i915] [ 4.974670] Code: 84 ab 00 00 00 ba 16 00 00 00 89 f0 e8 47 fe ff ff 3d 00 f0 ff ff 77 6b 89 18 c7 40 04 02 40 00 7 a 8b 56 44 8b 92 50 01 00 00 <8b> 52 04 c7 40 0c 00 00 00 00 c7 40 10 00 00 00 00 83 ca 04 89 50 [ 4.974706] EAX: f7a80000 EBX: 02000022 ECX: 00000000 EDX: 00000000 [ 4.974710] ESI: ec754a00 EDI: ec29e200 EBP: f692fc88 ESP: d3a08dfc [ 4.974713] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010287 [ 4.974717] CR0: 80050033 CR2: 00000004 CR3: 2c1836c0 CR4: 000006f0
