grsecurity forums

Posted: **Wed Jan 04, 2006 1:34 pm**

On 2.6.14.5 + grsecurity on amd64 in 32b mode debian unstable I get oops while booting system when modules are loaded / devices are probed/discovered.

What can it be?

Code: Select all: Detecting hardware...Discovered hardware for these modules: forcedeth 8139too sata_nv i810_audio usb_ohci ehci_hcd oading forcedeath module... force deathc. ... version 0.41 acpi_bus-0200 [01] bus_set_power : Device is not power manageable ACPI: PCI interrupt link APCH enabled at irq 21 PAX: modprobe:8960, uid/eid: 0/0, attempted to modify kernel code at virtual address c08ad5c8 printing eip: 00005741 *pgd = 8001e1 *pmd = 8001e1 Oops: 0003 [#1] PREEMPT Modules linked in: forcedeth nls_iso8859_1 nls_cp437 ntfs psmouse CPU: 0 EIP: 0060:[<00005741>] Not tainted VLI EFLAGS: 00010212 (2.6.14.5-grsec-a+ga-k8reg-p4) eax: 00603380 ebx: 000000b9 ecx: 00600000 edx: 00008e00 esi: 00000000 edi: f244ddbc ebp: 000000011 esp: f244dd7c ds: 007b es: 007b ss: 0068 Process modprobe (pid: 8960, threadinfo=f244c000 task=f788e030) Stack: 00000000 00017c13 002a7c81 00200000 0000011b c08d400e c091fcd9 00400000 c091cea8 c091ce1b 00000015 00000000 000000b9 00000015 000189b9 01000000 00000011 00000011 00000000 00000015 00015a66 00000001 00000000 00000015 Call Trace: 00000000 00017c13 002a7c13 00200000 0000011b 00400000 00000015 00000000 000000b9 [...about 50 lines...] 00000073 00000246 0000007b 00000000 Code: 66 7a 02 00 83 c4 08 5b e9 ed 1d 4a 00 8d b6 00 00 00 00 8d bc 27 00 00 00 00 b9 00 00 60 00 53 89 c3 89 c8 66 89 d0 66 ba 00 8e <89> 04 dd 00 d0 8a c0 89 14 dd 04 d0 8a c0 5b c3 90 90 90 90 90 /etc/rcS.d/S36discover: line 171: 8960 Segmentatiion fault modprobe $MODULE Loading 8139too module.... <6>8139too Fast Ethernet driver 0.9.27

Other two crashes (when I set grsecurity to enable itself LATER then normally throught echo 1 > /proc/sys/kernel/grsecurity/... but perhaps that was irrevelant)

Code: Select all: ...cuted here - end of scroll back in terminal... 00000073 00000206 0000007b 0000007b <hmm, perhaps it was twice, this address, in first dump as well> 00000000 [...] Code: [same as before] /etc/rcS.d/S36discover: line 171: 2192 Segmentatiion fault modprobe $MODULE * 8139too disabled in cofiguration * skipping unavailable/builtin sata_nv module. [...] YET, after the oops linux try to continue to boot: Loading ohci_hdc module... <6>usbcore: registered new driver usbfs usbcore: registered new driver hub ohci_hcd: 2005 April 22 USB 1.1 ... ohci_hcd: block sizes: ed 64 td 64 acpi_bus-0200 [01] bus_set_power : Device is not power manageable ACPI: PCI interrupt link APCH enabled at irq 21 PAX: modprobe:8960, uid/eid: 0/0, attempted to modify kernel code at virtual address c08ad608<this address is simmilar to 1st dump but a bit different> printing eip: 00005741 *pgd = 8001e1 <same as in 1st dump> *pmd = 8001e1 Oops: 0003 [#2] PREEMPT Modules linked in: ohci_hcd usbcore forcedeth nls_iso8859_1 nls_cp437 ntfs psmouse CPU: 0 EIP: 0060:[<00005741>] Not tainted VLI EFLAGS: 00010212 (2.6.14.5-grsec-a+ga-k8reg-p4) eax: 00603390 ebx: 000000c1 ecx: 00600000 edx: 00008e00 [...and so on...]

System works fine on 2.6.14.3 + grsecurity with simmilar settings
(I just enabled some extra drivers)
diff ot the configs:

root@lore:/usr/src/kernel/2.6.14.3+grsec/linux-2.6.14.3# diff -Nuar .config ../../2.6.14.5+grsec/linux-2.6.14.5/.config | egrep "^\+" > ~/1.diff

Code: Select all: +++ ../../2.6.14.5+grsec/linux-2.6.14.5/.config 2006-01-04 07:17:57.000000000 +0100 +# Linux kernel version: 2.6.14.5-grsec +# Wed Jan 4 07:17:57 2006 +CONFIG_LOCALVERSION="-a+ga-k8reg-pg4" +CONFIG_X86_UP_APIC=y +CONFIG_X86_UP_IOAPIC=y +CONFIG_X86_LOCAL_APIC=y +CONFIG_X86_IO_APIC=y +# CONFIG_X86_MCE_P4THERMAL is not set +CONFIG_APM=m +# CONFIG_APM_IGNORE_USER_SUSPEND is not set +# CONFIG_APM_DO_ENABLE is not set +CONFIG_APM_CPU_IDLE=y +# CONFIG_APM_DISPLAY_BLANK is not set +# CONFIG_APM_RTC_IS_GMT is not set +# CONFIG_APM_ALLOW_INTS is not set +CONFIG_APM_REAL_MODE_POWER_OFF=y +# CONFIG_PCI_MSI is not set +CONFIG_IEEE80211=m +CONFIG_IEEE80211_DEBUG=y +CONFIG_IEEE80211_CRYPT_WEP=m +CONFIG_IEEE80211_CRYPT_CCMP=m +CONFIG_IEEE80211_CRYPT_TKIP=m +CONFIG_MTD_AMD76XROM=m +CONFIG_MTD_ICHXROM=m +CONFIG_MTD_SCB2_FLASH=m +CONFIG_MTD_L440GX=m +CONFIG_MTD_PCMCIA=m +# CONFIG_MTD_PCMCIA_ANONYMOUS is not set +CONFIG_MTD_PLATRAM=m +CONFIG_PARIDE_BPCK=m +CONFIG_PARIDE_BPCK6=m +CONFIG_ATA_OVER_ETH=m +CONFIG_PDC202XX_BURST=y +# CONFIG_IPW2200 is not set +CONFIG_ISDN=m + +# +# Old ISDN4Linux +# +# CONFIG_ISDN_I4L is not set + +# +# CAPI subsystem +# +CONFIG_ISDN_CAPI=m +CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON=y +# CONFIG_ISDN_CAPI_MIDDLEWARE is not set +# CONFIG_ISDN_CAPI_CAPI20 is not set + +# +# CAPI hardware drivers +# + +# +# Active AVM cards +# +CONFIG_CAPI_AVM=y +# CONFIG_ISDN_DRV_AVMB1_B1PCI is not set +# CONFIG_ISDN_DRV_AVMB1_B1PCMCIA is not set +# CONFIG_ISDN_DRV_AVMB1_T1PCI is not set +# CONFIG_ISDN_DRV_AVMB1_C4 is not set + +# +# Active Eicon DIVA Server cards +# +CONFIG_CAPI_EICON=y +CONFIG_ISDN_DIVAS=m +# CONFIG_ISDN_DIVAS_BRIPCI is not set +# CONFIG_ISDN_DIVAS_PRIPCI is not set +CONFIG_ISDN_DIVAS_DIVACAPI=m +# CONFIG_ISDN_DIVAS_USERIDI is not set +# CONFIG_ISDN_DIVAS_MAINT is not set +CONFIG_PHONE_IXJ=m +# CONFIG_PHONE_IXJ_PCMCIA is not set +CONFIG_INPUT_JOYSTICK=y +CONFIG_JOYSTICK_ANALOG=m +# CONFIG_JOYSTICK_A3D is not set +# CONFIG_JOYSTICK_ADI is not set +# CONFIG_JOYSTICK_COBRA is not set +# CONFIG_JOYSTICK_GF2K is not set +# CONFIG_JOYSTICK_GRIP is not set +# CONFIG_JOYSTICK_GRIP_MP is not set +# CONFIG_JOYSTICK_GUILLEMOT is not set +# CONFIG_JOYSTICK_INTERACT is not set +# CONFIG_JOYSTICK_SIDEWINDER is not set +# CONFIG_JOYSTICK_TMDC is not set +# CONFIG_JOYSTICK_IFORCE is not set +# CONFIG_JOYSTICK_WARRIOR is not set +# CONFIG_JOYSTICK_MAGELLAN is not set +# CONFIG_JOYSTICK_SPACEORB is not set +# CONFIG_JOYSTICK_SPACEBALL is not set +# CONFIG_JOYSTICK_STINGER is not set +# CONFIG_JOYSTICK_TWIDJOY is not set +# CONFIG_JOYSTICK_DB9 is not set +# CONFIG_JOYSTICK_GAMECON is not set +# CONFIG_JOYSTICK_TURBOGRAFX is not set +CONFIG_JOYSTICK_JOYDUMP=m +CONFIG_RIO=m +# CONFIG_RIO_OLDPCI is not set +CONFIG_SOFT_WATCHDOG=m +CONFIG_AGP_ALI=m +CONFIG_AGP_ATI=m +CONFIG_AGP_AMD=m +CONFIG_AGP_NVIDIA=m +CONFIG_AGP_SIS=m +CONFIG_AGP_SWORKS=m +CONFIG_AGP_VIA=m +CONFIG_AGP_EFFICEON=m +CONFIG_DRM_SAVAGE=m +CONFIG_SYNCLINK_CS=m +CONFIG_MAX_RAW_DEVS=512 +CONFIG_DVB=y +CONFIG_DVB_CORE=m + +# +# Supported SAA7146 based PCI Adapters +# +CONFIG_DVB_AV7110=m +CONFIG_DVB_AV7110_OSD=y +CONFIG_DVB_BUDGET=m +CONFIG_DVB_BUDGET_CI=m +CONFIG_DVB_BUDGET_AV=m +CONFIG_DVB_BUDGET_PATCH=m + +# +# Supported USB Adapters +# +CONFIG_DVB_USB=m +CONFIG_DVB_USB_DEBUG=y +# CONFIG_DVB_USB_A800 is not set +# CONFIG_DVB_USB_DIBUSB_MB is not set +# CONFIG_DVB_USB_DIBUSB_MC is not set +# CONFIG_DVB_USB_UMT_010 is not set +# CONFIG_DVB_USB_CXUSB is not set +# CONFIG_DVB_USB_DIGITV is not set +# CONFIG_DVB_USB_VP7045 is not set +# CONFIG_DVB_USB_VP702X is not set +# CONFIG_DVB_USB_NOVA_T_USB2 is not set +# CONFIG_DVB_USB_DTT200U is not set +# CONFIG_DVB_TTUSB_BUDGET is not set +# CONFIG_DVB_TTUSB_DEC is not set +# CONFIG_DVB_CINERGYT2 is not set + +# +# Supported FlexCopII (B2C2) Adapters +# +CONFIG_DVB_B2C2_FLEXCOP=m +# CONFIG_DVB_B2C2_FLEXCOP_PCI is not set +# CONFIG_DVB_B2C2_FLEXCOP_USB is not set +# CONFIG_DVB_B2C2_FLEXCOP_DEBUG is not set + +# +# Supported BT878 Adapters +# +CONFIG_DVB_BT8XX=m + +# +# Supported Pluto2 Adapters +# +CONFIG_DVB_PLUTO2=m + +# +# Supported DVB Frontends +# + +# +# Customise DVB Frontends +# + +# +# DVB-S (satellite) frontends +# +CONFIG_DVB_STV0299=m +CONFIG_DVB_CX24110=m +CONFIG_DVB_TDA8083=m +# CONFIG_DVB_TDA80XX is not set +CONFIG_DVB_MT312=m +CONFIG_DVB_VES1X93=m +CONFIG_DVB_S5H1420=m + +# +# DVB-T (terrestrial) frontends +# +CONFIG_DVB_SP8870=m +CONFIG_DVB_SP887X=m +# CONFIG_DVB_CX22700 is not set +# CONFIG_DVB_CX22702 is not set +CONFIG_DVB_L64781=m +CONFIG_DVB_TDA1004X=m +CONFIG_DVB_NXT6000=m +CONFIG_DVB_MT352=m +# CONFIG_DVB_DIB3000MB is not set +# CONFIG_DVB_DIB3000MC is not set + +# +# DVB-C (cable) frontends +# +# CONFIG_DVB_ATMEL_AT76C651 is not set +CONFIG_DVB_VES1820=m +CONFIG_DVB_TDA10021=m +CONFIG_DVB_STV0297=m + +# +# ATSC (North American/Korean Terresterial DTV) frontends +# +CONFIG_DVB_NXT2002=m +CONFIG_DVB_OR51211=m +# CONFIG_DVB_OR51132 is not set +CONFIG_DVB_BCM3510=m +# CONFIG_DVB_LGDT330X is not set +CONFIG_VIDEO_SAA7146=m +CONFIG_VIDEO_SAA7146_VV=m +CONFIG_VIDEO_VIDEOBUF=m +CONFIG_FB_RADEON=m +CONFIG_FB_RADEON_I2C=y +# CONFIG_FB_RADEON_DEBUG is not set +CONFIG_FB_SAVAGE=m +# CONFIG_FB_SAVAGE_I2C is not set +# CONFIG_FB_SAVAGE_ACCEL is not set +CONFIG_FB_SIS=m +# CONFIG_FB_SIS_300 is not set +# CONFIG_FB_SIS_315 is not set +CONFIG_FB_3DFX=m +# CONFIG_FB_3DFX_ACCEL is not set +CONFIG_FB_VOODOO1=m +CONFIG_FB_TRIDENT=m +# CONFIG_FB_TRIDENT_ACCEL is not set +CONFIG_BACKLIGHT_LCD_SUPPORT=y +CONFIG_BACKLIGHT_CLASS_DEVICE=m +CONFIG_BACKLIGHT_DEVICE=y +CONFIG_LCD_CLASS_DEVICE=m +CONFIG_LCD_DEVICE=y +CONFIG_SOUND_ES1370=m +CONFIG_SOUND_ESSSOLO1=m +CONFIG_SOUND_MAESTRO=m +CONFIG_SOUND_MAESTRO3=m +CONFIG_SOUND_SONICVIBES=m +CONFIG_SOUND_TRIX=m +CONFIG_SOUND_WAVEFRONT=m +CONFIG_SOUND_MAUI=m +CONFIG_SOUND_YM3812=m +CONFIG_SOUND_OPL3SA1=m +CONFIG_SOUND_OPL3SA2=m +CONFIG_SOUND_YMFPCI=m +# CONFIG_SOUND_YMFPCI_LEGACY is not set +CONFIG_AEDSP16_MSS=y +CONFIG_USB_SUSPEND=y +CONFIG_USB_STORAGE_DEBUG=y +CONFIG_HID_FF=y +# CONFIG_HID_PID is not set +# CONFIG_LOGITECH_FF is not set +# CONFIG_THRUSTMASTER_FF is not set +CONFIG_USB_ACECAD=m +CONFIG_USB_KEYSPAN_REMOTE=m +CONFIG_USB_APPLETOUCH=m +CONFIG_USB_DABUSB=m +CONFIG_USB_EMI62=m +CONFIG_USB_ATM=m +CONFIG_USB_SPEEDTOUCH=m +CONFIG_USB_CXACRU=m +CONFIG_USB_XUSBATM=m +CONFIG_MMC_DEBUG=y +CONFIG_INFINIBAND=m +# CONFIG_INFINIBAND_USER_MAD is not set +# CONFIG_INFINIBAND_USER_ACCESS is not set +# CONFIG_INFINIBAND_MTHCA is not set +# CONFIG_INFINIBAND_IPOIB is not set +CONFIG_DETECT_SOFTLOCKUP=y +CONFIG_SCHEDSTATS=y +CONFIG_X86_FIND_SMP_CONFIG=y +CONFIG_X86_MPPARSE=y +CONFIG_GRKERNSEC_ACL_MAXTRIES=2 +CONFIG_GRKERNSEC_ACL_TIMEOUT=30 +CONFIG_CRYPTO_AES=m

Posted: **Wed Jan 04, 2006 5:14 pm**

Thanks to pipacs @ #grsecurity @ irc.oftc.net I got some more informations.
In case of crash look in /var/log/messages

Even from the not-debug-enabled-kernel it seems the symbols where partially resolved there

Code: Select all: /etc/init.d/rcS[rcS:23366] uid/euid:0/0 gid/egid:0/0 Jan 4 08:50:28 lore kernel: EXT3-fs warning: maximal mount count reached, running e2fsck is recommended Jan 4 08:50:28 lore kernel: kjournald starting. Commit interval 5 seconds Jan 4 08:50:28 lore kernel: EXT3 FS on hda17, internal journal Jan 4 08:50:28 lore kernel: EXT3-fs: mounted filesystem with ordered data mode. Jan 4 08:50:28 lore kernel: grsec: mount of /dev/hda17 to /mnt/wine/1/c by /bin/mount[mount:27496] uid/euid:0/0 gid/egid:0/0, parent /etc/init.d/rcS[rcS:23366] uid/euid:0/0 gid/egid:0/0 Jan 4 08:50:28 lore kernel: process `syslogd' is using obsolete setsockopt SO_BSDCOMPAT Jan 4 08:52:01 lore kernel: grsec: mount of /dev/hda12 to /usr by /bin/mount[mount:25353] uid/euid:0/0 gid/egid:0/0, parent /bin/bash[bash:2907] uid/euid:0/0 gid/egid:0/0 Jan 4 08:53:52 lore kernel: nvidia: module license 'NVIDIA' taints kernel. Jan 4 08:53:52 lore kernel: acpi_bus-0200 [01] bus_set_power : Device is not power manageable Jan 4 08:53:52 lore kernel: ACPI: PCI Interrupt Link [APC5] enabled at IRQ 16 Jan 4 08:53:52 lore kernel: 00005741 Jan 4 08:53:52 lore kernel: PREEMPT Jan 4 08:53:52 lore kernel: Modules linked in: nvidia Jan 4 08:53:52 lore kernel: CPU: 0 Jan 4 08:53:52 lore kernel: EIP: 0060:[set_intr_gate+17/48] Tainted: P VLI Jan 4 08:53:52 lore kernel: EFLAGS: 00010212 (2.6.14.5-grsec-a+ga-k8reg-pg4) Jan 4 08:53:52 lore kernel: eax: 00603380 ebx: 000000b9 ecx: 00600000 edx: 00008e00 Jan 4 08:53:52 lore kernel: esi: 00000001 edi: f6a4fd8c ebp: 00000011 esp: f6a4fd4c Jan 4 08:53:52 lore kernel: ds: 007b es: 007b ss: 0068 Jan 4 08:53:52 lore kernel: Process insmod (pid: 20299, threadinfo=f6a4e000 task=f52eb030) Jan 4 08:53:52 lore kernel: Stack: 00000000 00017c13 002a7c81 00200000 0000011b c08d400e c091fcd9 00400000 Jan 4 08:53:52 lore kernel: c091cea8 c091ce1b 00000010 00000000 000000b9 00000010 0001a9b9 01000000 Jan 4 08:53:52 lore kernel: 00000011 00000011 00000000 00000010 00015a66 00000001 00000001 00000010 Jan 4 08:53:52 lore kernel: Call Trace: Jan 4 08:53:52 lore kernel: [_text+0/261] Jan 4 08:53:52 lore kernel: [io_apic_set_pci_routing+483/736] Jan 4 08:53:53 lore kernel: [acpi_ut_value_exit+36/46] Jan 4 08:53:53 lore kernel: [xfs_lock_dir_and_entry+304/320] Jan 4 08:53:53 lore kernel: [checkCPUtype+22/129] Jan 4 08:53:53 lore kernel: [phys_startup_32+0/480] Jan 4 08:53:53 lore kernel: [_text+16/261] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [_text+185/261] Jan 4 08:53:53 lore kernel: [_text+16/261] Jan 4 08:53:53 lore kernel: [aes_enc_blk+1369/2924] Jan 4 08:53:53 lore kernel: [_text+17/261] Jan 4 08:53:53 lore kernel: [_text+17/261] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [_text+16/261] Jan 4 08:53:53 lore kernel: [mp_register_gsi+278/464] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_text+16/261] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_text+16/261] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [acpi_register_gsi+94/128] Jan 4 08:53:53 lore kernel: [acpi_pci_irq_enable+348/800] Jan 4 08:53:53 lore kernel: [_text+16/261] Jan 4 08:53:53 lore kernel: [acpi_pci_irq_enable+579/800] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [lock_may_write+112/176] Jan 4 08:53:53 lore kernel: [name_to_dev_t+383/720] Jan 4 08:53:53 lore kernel: [pcibios_enable_device+20/32] Jan 4 08:53:53 lore kernel: [pci_enable_device_bars+47/80] Jan 4 08:53:53 lore kernel: [pci_enable_device+22/80] Jan 4 08:53:53 lore kernel: [_etext+3217451/-1077581902] Jan 4 08:53:53 lore kernel: [init+50/368] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore last message repeated 6 times Jan 4 08:53:53 lore kernel: [pci_call_probe+10/16] Jan 4 08:53:53 lore kernel: [__pci_device_probe+70/96] Jan 4 08:53:53 lore kernel: [pci_device_probe+38/64] Jan 4 08:53:53 lore kernel: [driver_probe_device+59/208] Jan 4 08:53:53 lore kernel: [__driver_attach+57/64] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [bus_for_each_dev+58/96] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [driver_attach+22/32] Jan 4 08:53:53 lore kernel: [__driver_attach+0/64] Jan 4 08:53:53 lore kernel: [bus_add_driver+123/208] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [pci_register_driver+88/128] Jan 4 08:53:53 lore kernel: [_text+1/261] Jan 4 08:53:53 lore kernel: [_etext+3487740/-1077581902] Jan 4 08:53:53 lore kernel: [_text+26/261] Jan 4 08:53:53 lore kernel: [_text+26/261] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore last message repeated 2 times Jan 4 08:53:53 lore kernel: [sys_init_module+174/528] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore last message repeated 2 times Jan 4 08:53:53 lore kernel: [syscall_call+7/11] Jan 4 08:53:53 lore kernel: [.text.lock.arp_tables+233/332] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: [_text+128/261] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+128/261] Jan 4 08:53:53 lore kernel: [_text+115/261] Jan 4 08:53:53 lore kernel: [ignore_int+6/64] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [ignore_int+6/64] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+115/261] Jan 4 08:53:53 lore kernel: [ignore_int+6/64] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [lookup_bdev+93/144] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+3/261] Jan 4 08:53:53 lore kernel: [_text+115/261] Jan 4 08:53:53 lore kernel: [ignore_int+6/64] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore last message repeated 2 times Jan 4 08:53:53 lore kernel: [_text+163/261] Jan 4 08:53:53 lore kernel: [_text+115/261] Jan 4 08:53:53 lore kernel: [rest_init+6/48] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+115/261] Jan 4 08:53:53 lore kernel: [rest_init+6/48] Jan 4 08:53:53 lore kernel: [_text+123/261] Jan 4 08:53:53 lore kernel: [_text+0/261] Jan 4 08:53:53 lore kernel: Code: 66 7a 02 00 83 c4 08 5b e9 ed 1d 4a 00 8d b6 00 00 00 00 8d bc 27 00 00 00 00 b9 00 00 60 00 53 89 c3 89 c8 66 89 d0 66 ba 00 8e <89> 04 dd 00 d0 8a c0 89 14 dd 04 d0 8a c0 5b c3 90 90 90 90 90 Jan 4 08:54:24 lore shutdown[21106]: shutting down for system reboot Jan 4 08:54:38 lore kernel: Kernel logging (proc) stopped. Jan 4 08:54:38 lore kernel: Kernel log daemon terminating. Jan 4 08:54:38 lore exiting on signal 15

Posted: **Wed Jan 04, 2006 5:24 pm**

In relation to
http://grsecurity.net/pipermail/grsecurity/2005-November/000616.html
following part of .config of crashin kernels might be relevant

Code: Select all: CONFIG_PCI=y # CONFIG_PCI_GOBIOS is not set # CONFIG_PCI_GOMMCONFIG is not set # CONFIG_PCI_GODIRECT is not set CONFIG_PCI_GOANY=y CONFIG_PCI_DIRECT=y CONFIG_PCI_MMCONFIG=y CONFIG_PCIEPORTBUS=y CONFIG_HOTPLUG_PCI_PCIE=m

Code: Select all: CONFIG_PAX_NOEXEC=y CONFIG_PAX_PAGEEXEC=y # CONFIG_PAX_SEGMEXEC is not set # CONFIG_PAX_EMUTRAMP is not set CONFIG_PAX_MPROTECT=y # CONFIG_PAX_NOELFRELOCS is not set CONFIG_PAX_KERNEXEC=y

Posted: **Wed Jan 04, 2006 9:50 pm**

Ok, Pipacs wrote a simple patch correcting that problem, it can be downloaded from
http://www.grsecurity.net/~paxguy1/pax-linux-2.6.14-kernexec-fix.patch

The patch is:

Code: Select all: diff -u linux-2.6.14-pax/arch/i386/kernel/traps.c linux-2.6.14-pax/arch/i386/kernel/traps.c --- linux-2.6.14-pax/arch/i386/kernel/traps.c 2005-12-28 16:46:00.000000000 +0100 +++ linux-2.6.14-pax/arch/i386/kernel/traps.c 2006-01-04 22:44:23.000000000 +0100 @@ -1059,7 +1059,19 @@ */ void set_intr_gate(unsigned int n, void *addr) { + +#ifdef CONFIG_PAX_KERNEXEC + unsigned long cr0; + + pax_open_kernel(cr0); +#endif + _set_gate(idt_table+n,14,0,addr,__KERNEL_CS); + +#ifdef CONFIG_PAX_KERNEXEC + pax_close_kernel(cr0); +#endif + } /*

So that:
vim arch/i386/kernel/traps.c +1059
will be like:

Code: Select all: void set_intr_gate(unsigned int n, void *addr) { #ifdef CONFIG_PAX_KERNEXEC unsigned long cr0; pax_open_kernel(cr0); #endif _set_gate(idt_table+n,14,0,addr,__KERNEL_CS); #ifdef CONFIG_PAX_KERNEXEC pax_close_kernel(cr0); #endif }

But if that will not work try also this one:

Code: Select all: void set_intr_gate(unsigned int n, void *addr) { #ifdef CONFIG_PAX_KERNEXEC unsigned long cr0, flags; pax_open_kernel(flags,cr0); #endif _set_gate(idt_table+n,14,0,addr,__KERNEL_CS); #ifdef CONFIG_PAX_KERNEXEC pax_close_kernel(flags,cr0); #endif }

grsecurity forums

oops 2.6.14.5 + grsecurity while loading modules

oops 2.6.14.5 + grsecurity while loading modules