On Mon, 19 May, at 09:09:58AM, Francis Moreau wrote: > On 05/18/2014 03:42 PM, Borislav Petkov wrote: > > On Sat, May 17, 2014 at 05:25:47PM +0200, Francis Moreau wrote: > >> [ +0.018677] general protection fault: 0000 [#1] PREEMPT SMP > >> [ +0.000068] Modules linked in: usb_storage tun raid1 md_mod loop fuse > >> joydev coretemp hwmon arc4 intel_rapl x86_pkg_temp_thermal > >> intel_powerclamp kvm_intel nls_iso8859_1 nls_cp437 iTCO_wdt kvm vfat fat > >> iTCO_vendor_support iwldvm uvcvideo led_class crct10dif_pclmul > >> crc32_pclmul crc32c_intel ghash_clmulni_intel mac80211 videobuf2_vmalloc > >> videobuf2_memops videobuf2_core aesni_intel videodev aes_x86_64 > >> snd_hda_codec_hdmi lrw gf128mul mousedev glue_helper btusb > >> snd_hda_codec_via ablk_helper media cryptd iwlwifi snd_hda_codec_generic > >> bluetooth psmouse microcode i2c_i801 serio_raw cfg80211 6lowpan_iphc > >> rtsx_pci_ms r8169 memstick rfkill lpc_ich mii snd_hda_intel > >> snd_hda_codec thermal snd_hwdep wmi snd_pcm tpm_infineon snd_timer > >> tpm_tis mei_me snd tpm mei shpchp evdev soundcore processor battery > >> mac_hid ac > >> [ +0.000803] ext4 crc16 mbcache jbd2 hid_generic usbhid hid bcache > >> sd_mod sr_mod crc_t10dif cdrom crct10dif_common rtsx_pci_sdmmc mmc_core > >> atkbd libps2 ahci libahci ehci_pci libata xhci_hcd ehci_hcd scsi_mod > >> rtsx_pci usbcore usb_common i8042 serio i915 video button intel_gtt > >> i2c_algo_bit drm_kms_helper drm i2c_core > >> [ +0.000328] CPU: 0 PID: 30835 Comm: systemd-udevd Not tainted > >> 3.14.2-1-ARCH #1 > >> [ +0.000064] Hardware name: CLEVO CO. W55xEU > >> /W55xEU , BIOS 4.6.5 > >> 03/05/2013 > >> [ +0.000102] task: ffff880405ee6bf0 ti: ffff880400f4a000 task.ti: > >> ffff880400f4a000 > >> [ +0.000060] RIP: 0010:[<ffffffff810655af>] [<ffffffff810655af>] > >> efi_call5+0x6f/0xf0 > >> [ +0.000071] RSP: 0018:ffff880400f4bdb0 EFLAGS: 00010002 > >> [ +0.000045] RAX: 0000000080050033 RBX: ffff8804040e3000 RCX: > >> ffff8804040e3000 > >> [ +0.000055] RDX: ffff8804040e3400 RSI: ffff8804040e3000 RDI: > >> bff7fffff7afffff > > > > So you get a #GP while executing call *rdi and %rdi is supposed to > > contain ->get_variable. But instead it contains some very funky shit: > > > > 0xbff7fffff7afffff > > > > Who made it contain that nuisance of a pointer which thinks it is > > ->get_variable, huh? If only I could get my hands on that guy! :-P > > > > Ok, seriously, how reproducible is this? > > I don't really know how to reproduce this, I only can say that it > usually happens while partitioning the loop device or perhaps when the > kernel reads the partition table afterwards. It looks like it's oopsing as a result of systemd-udevd trying to read a variable via the efivarfs mount, Call Trace: [<ffffffff81064901>] ? virt_efi_get_variable+0x51/0x80 [<ffffffff813dbb71>] efivar_entry_size+0x41/0x80 [<ffffffff81245659>] efivarfs_file_read+0x49/0x100 [<ffffffff811ba797>] vfs_read+0x97/0x160 [<ffffffff811bb2e9>] SyS_read+0x59/0xd0 [<ffffffff81517629>] system_call_fastpath+0x16/0x1b -- Matt Fleming, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
