* [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging
@ 2020-01-16 1:48 Michael Ellerman
2020-01-16 1:48 ` [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE Michael Ellerman
` (8 more replies)
0 siblings, 9 replies; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
The QLGE driver moved to staging in commit 955315b0dc8c ("qlge: Move
drivers/net/ethernet/qlogic/qlge/ to drivers/staging/qlge/"), meaning
our defconfigs that enable it have no effect as we don't enable
CONFIG_STAGING.
It sounds like the device is obsolete, so drop the driver.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/powernv_defconfig | 1 -
arch/powerpc/configs/ppc64_defconfig | 1 -
arch/powerpc/configs/ppc6xx_defconfig | 1 -
arch/powerpc/configs/pseries_defconfig | 1 -
arch/powerpc/configs/skiroot_defconfig | 1 -
5 files changed, 5 deletions(-)
diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/configs/powernv_defconfig
index 32841456a573..71749377d164 100644
--- a/arch/powerpc/configs/powernv_defconfig
+++ b/arch/powerpc/configs/powernv_defconfig
@@ -181,7 +181,6 @@ CONFIG_MLX5_FPGA=y
CONFIG_MLX5_CORE_EN=y
CONFIG_MLX5_CORE_IPOIB=y
CONFIG_MYRI10GE=m
-CONFIG_QLGE=m
CONFIG_NETXEN_NIC=m
CONFIG_USB_NET_DRIVERS=m
# CONFIG_WLAN is not set
diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index b250e6f5a7ca..7e68cb222c7b 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -189,7 +189,6 @@ CONFIG_MLX4_EN=m
CONFIG_MYRI10GE=m
CONFIG_S2IO=m
CONFIG_PASEMI_MAC=y
-CONFIG_QLGE=m
CONFIG_NETXEN_NIC=m
CONFIG_SUNGEM=y
CONFIG_GELIC_NET=m
diff --git a/arch/powerpc/configs/ppc6xx_defconfig b/arch/powerpc/configs/ppc6xx_defconfig
index 7e28919041cf..3e2f44f38ac5 100644
--- a/arch/powerpc/configs/ppc6xx_defconfig
+++ b/arch/powerpc/configs/ppc6xx_defconfig
@@ -507,7 +507,6 @@ CONFIG_FORCEDETH=m
CONFIG_HAMACHI=m
CONFIG_YELLOWFIN=m
CONFIG_QLA3XXX=m
-CONFIG_QLGE=m
CONFIG_NETXEN_NIC=m
CONFIG_8139CP=m
CONFIG_8139TOO=m
diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/configs/pseries_defconfig
index 26126b4d4de3..6b68109e248f 100644
--- a/arch/powerpc/configs/pseries_defconfig
+++ b/arch/powerpc/configs/pseries_defconfig
@@ -169,7 +169,6 @@ CONFIG_IXGBE=m
CONFIG_I40E=m
CONFIG_MLX4_EN=m
CONFIG_MYRI10GE=m
-CONFIG_QLGE=m
CONFIG_NETXEN_NIC=m
CONFIG_PPP=m
CONFIG_PPP_BSDCOMP=m
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 069f67f12731..7ff1ff1ddc28 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -171,7 +171,6 @@ CONFIG_MYRI10GE=m
# CONFIG_NET_VENDOR_NVIDIA is not set
# CONFIG_NET_VENDOR_OKI is not set
# CONFIG_NET_VENDOR_PACKET_ENGINES is not set
-CONFIG_QLGE=m
CONFIG_NETXEN_NIC=m
CONFIG_QED=m
CONFIG_QEDE=m
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:54 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 3/9] powerpc/configs: Drop NET_VENDOR_HP which moved to staging Michael Ellerman
` (7 subsequent siblings)
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
The NET_CADENCE symbol was renamed to NET_VENDOR_CADENCE, so we don't
need to disable the former, see commit 0df5f81c481e ("net: ethernet:
Add missing VENDOR to Cadence and Packet Engines symbols").
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 7ff1ff1ddc28..eaaffe9ae8b9 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -138,7 +138,6 @@ CONFIG_TIGON3=m
CONFIG_BNX2X=m
# CONFIG_NET_VENDOR_BROCADE is not set
# CONFIG_NET_VENDOR_CADENCE is not set
-# CONFIG_NET_CADENCE is not set
# CONFIG_NET_VENDOR_CAVIUM is not set
CONFIG_CHELSIO_T1=m
# CONFIG_NET_VENDOR_CISCO is not set
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 3/9] powerpc/configs: Drop NET_VENDOR_HP which moved to staging
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
2020-01-16 1:48 ` [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:54 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 4/9] powerpc/configs/skiroot: Drop HID_LOGITECH Michael Ellerman
` (6 subsequent siblings)
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
The HP network driver moved to staging in commit 52340b82cf1a ("hp100:
Move 100BaseVG AnyLAN driver to staging") meaning we don't need to
disable it any more in our defconfigs.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/44x/akebono_defconfig | 1 -
arch/powerpc/configs/skiroot_defconfig | 1 -
2 files changed, 2 deletions(-)
diff --git a/arch/powerpc/configs/44x/akebono_defconfig b/arch/powerpc/configs/44x/akebono_defconfig
index f0c8a07cc274..7705a5c3f4ea 100644
--- a/arch/powerpc/configs/44x/akebono_defconfig
+++ b/arch/powerpc/configs/44x/akebono_defconfig
@@ -59,7 +59,6 @@ CONFIG_BLK_DEV_SD=y
# CONFIG_NET_VENDOR_DLINK is not set
# CONFIG_NET_VENDOR_EMULEX is not set
# CONFIG_NET_VENDOR_EXAR is not set
-# CONFIG_NET_VENDOR_HP is not set
CONFIG_IBM_EMAC=y
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MELLANOX is not set
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index eaaffe9ae8b9..3eee39c50941 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -146,7 +146,6 @@ CONFIG_CHELSIO_T1=m
# CONFIG_NET_VENDOR_DLINK is not set
CONFIG_BE2NET=m
# CONFIG_NET_VENDOR_EZCHIP is not set
-# CONFIG_NET_VENDOR_HP is not set
# CONFIG_NET_VENDOR_HUAWEI is not set
CONFIG_E1000=m
CONFIG_E1000E=m
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 4/9] powerpc/configs/skiroot: Drop HID_LOGITECH
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
2020-01-16 1:48 ` [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE Michael Ellerman
2020-01-16 1:48 ` [PATCH 3/9] powerpc/configs: Drop NET_VENDOR_HP which moved to staging Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:55 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 5/9] powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV Michael Ellerman
` (5 subsequent siblings)
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
Commit bdd08fff4915 ("HID: logitech: Add depends on LEDS_CLASS to
Logitech Kconfig entry") made HID_LOGITECH depend on LEDS_CLASS which
we do not enable, meaning we are not actually enabling those drivers
any more.
The Kconfig help text suggests USB HID compliant Logictech devices
will continue to work without HID_LOGITECH, so just drop it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 3eee39c50941..74cffb854c0f 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -235,7 +235,6 @@ CONFIG_HID_CYPRESS=y
CONFIG_HID_EZKEY=y
CONFIG_HID_ITE=y
CONFIG_HID_KENSINGTON=y
-CONFIG_HID_LOGITECH=y
CONFIG_HID_MICROSOFT=y
CONFIG_HID_MONTEREY=y
CONFIG_USB_HIDDEV=y
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 5/9] powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
` (2 preceding siblings ...)
2020-01-16 1:48 ` [PATCH 4/9] powerpc/configs/skiroot: Drop HID_LOGITECH Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:55 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 6/9] powerpc/configs/skiroot: Update for symbol movement only Michael Ellerman
` (4 subsequent siblings)
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
It's default n so we don't need to disable it.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 74cffb854c0f..0aa060eef06c 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -293,5 +293,4 @@ CONFIG_WQ_WATCHDOG=y
CONFIG_XMON=y
CONFIG_XMON_DEFAULT=y
CONFIG_ENCRYPTED_KEYS=y
-# CONFIG_CRYPTO_ECHAINIV is not set
# CONFIG_CRYPTO_HW is not set
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 6/9] powerpc/configs/skiroot: Update for symbol movement only
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
` (3 preceding siblings ...)
2020-01-16 1:48 ` [PATCH 5/9] powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:52 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 7/9] powerpc/configs/skiroot: Enable security features Michael Ellerman
` (3 subsequent siblings)
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 42 +++++++++++++-------------
1 file changed, 21 insertions(+), 21 deletions(-)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 0aa060eef06c..24a210fe0049 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -1,8 +1,3 @@
-CONFIG_PPC64=y
-CONFIG_ALTIVEC=y
-CONFIG_VSX=y
-CONFIG_NR_CPUS=2048
-CONFIG_CPU_LITTLE_ENDIAN=y
CONFIG_KERNEL_XZ=y
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
@@ -29,16 +24,11 @@ CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB_FREELIST_HARDENED=y
-CONFIG_JUMP_LABEL=y
-CONFIG_STRICT_KERNEL_RWX=y
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
-CONFIG_MODULE_SIG=y
-CONFIG_MODULE_SIG_FORCE=y
-CONFIG_MODULE_SIG_SHA512=y
-CONFIG_PARTITION_ADVANCED=y
-# CONFIG_MQ_IOSCHED_DEADLINE is not set
-# CONFIG_MQ_IOSCHED_KYBER is not set
+CONFIG_PPC64=y
+CONFIG_ALTIVEC=y
+CONFIG_VSX=y
+CONFIG_NR_CPUS=2048
+CONFIG_CPU_LITTLE_ENDIAN=y
# CONFIG_PPC_VAS is not set
# CONFIG_PPC_PSERIES is not set
# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set
@@ -49,14 +39,24 @@ CONFIG_KEXEC=y
CONFIG_PRESERVE_FA_DUMP=y
CONFIG_IRQ_ALL_CPUS=y
CONFIG_NUMA=y
-# CONFIG_COMPACTION is not set
-# CONFIG_MIGRATION is not set
CONFIG_PPC_64K_PAGES=y
CONFIG_SCHED_SMT=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=tty0 console=hvc0 ipr.fast_reboot=1 quiet"
# CONFIG_SECCOMP is not set
# CONFIG_PPC_MEM_KEYS is not set
+CONFIG_JUMP_LABEL=y
+CONFIG_STRICT_KERNEL_RWX=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_SIG=y
+CONFIG_MODULE_SIG_FORCE=y
+CONFIG_MODULE_SIG_SHA512=y
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_MQ_IOSCHED_DEADLINE is not set
+# CONFIG_MQ_IOSCHED_KYBER is not set
+# CONFIG_COMPACTION is not set
+# CONFIG_MIGRATION is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
@@ -153,7 +153,6 @@ CONFIG_IGB=m
CONFIG_IXGB=m
CONFIG_IXGBE=m
CONFIG_I40E=m
-CONFIG_S2IO=m
# CONFIG_NET_VENDOR_MARVELL is not set
CONFIG_MLX4_EN=m
# CONFIG_MLX4_CORE_GEN2 is not set
@@ -164,6 +163,7 @@ CONFIG_MLX5_CORE_EN=y
# CONFIG_NET_VENDOR_MICROSEMI is not set
CONFIG_MYRI10GE=m
# CONFIG_NET_VENDOR_NATSEMI is not set
+CONFIG_S2IO=m
# CONFIG_NET_VENDOR_NETRONOME is not set
# CONFIG_NET_VENDOR_NI is not set
# CONFIG_NET_VENDOR_NVIDIA is not set
@@ -271,6 +271,8 @@ CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
CONFIG_NLS_UTF8=y
+CONFIG_ENCRYPTED_KEYS=y
+# CONFIG_CRYPTO_HW is not set
CONFIG_CRC16=y
CONFIG_CRC_ITU_T=y
CONFIG_LIBCRC32C=y
@@ -289,8 +291,6 @@ CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y
CONFIG_WQ_WATCHDOG=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_FTRACE is not set
-# CONFIG_RUNTIME_TESTING_MENU is not set
CONFIG_XMON=y
CONFIG_XMON_DEFAULT=y
-CONFIG_ENCRYPTED_KEYS=y
-# CONFIG_CRYPTO_HW is not set
+# CONFIG_RUNTIME_TESTING_MENU is not set
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [PATCH 7/9] powerpc/configs/skiroot: Enable security features
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
` (4 preceding siblings ...)
2020-01-16 1:48 ` [PATCH 6/9] powerpc/configs/skiroot: Update for symbol movement only Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 5:00 ` Daniel Axtens
2020-01-16 1:48 ` [RFC PATCH 8/9] powerpc/configs/skiroot: Disable xmon default & enable reboot on panic Michael Ellerman
` (2 subsequent siblings)
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
From: Joel Stanley <joel@jms.id.au>
This turns on HARDENED_USERCOPY with HARDENED_USERCOPY_PAGESPAN, and
FORTIFY_SOURCE.
It also enables SECURITY_LOCKDOWN_LSM with _EARLY and
LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY options enabled.
MODULE_SIG is selected by lockdown, so it is still enabled.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 24a210fe0049..bd661a9a9410 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -49,7 +49,6 @@ CONFIG_JUMP_LABEL=y
CONFIG_STRICT_KERNEL_RWX=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
-CONFIG_MODULE_SIG=y
CONFIG_MODULE_SIG_FORCE=y
CONFIG_MODULE_SIG_SHA512=y
CONFIG_PARTITION_ADVANCED=y
@@ -272,6 +271,16 @@ CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
CONFIG_NLS_UTF8=y
CONFIG_ENCRYPTED_KEYS=y
+CONFIG_SECURITY=y
+CONFIG_HARDENED_USERCOPY=y
+# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
+CONFIG_HARDENED_USERCOPY_PAGESPAN=y
+CONFIG_FORTIFY_SOURCE=y
+CONFIG_SECURITY_LOCKDOWN_LSM=y
+CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y
+CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY=y
+# CONFIG_INTEGRITY is not set
+CONFIG_LSM="yama,loadpin,safesetid,integrity"
# CONFIG_CRYPTO_HW is not set
CONFIG_CRC16=y
CONFIG_CRC_ITU_T=y
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [RFC PATCH 8/9] powerpc/configs/skiroot: Disable xmon default & enable reboot on panic
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
` (5 preceding siblings ...)
2020-01-16 1:48 ` [PATCH 7/9] powerpc/configs/skiroot: Enable security features Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:53 ` Joel Stanley
2020-01-16 1:48 ` [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options Michael Ellerman
2020-01-16 1:54 ` [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Joel Stanley
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
If the skiroot kernel crashes we don't want it sitting at an xmon
prompt forever. Instead it's more helpful to reboot and bring the
boot loader back up, and if the crash was transient we can then boot
successfully.
Similarly if we panic we should reboot, with a short timeout in case
someone is watching the console.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index bd661a9a9410..12c96c8b0c1d 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -29,6 +29,7 @@ CONFIG_ALTIVEC=y
CONFIG_VSX=y
CONFIG_NR_CPUS=2048
CONFIG_CPU_LITTLE_ENDIAN=y
+CONFIG_PANIC_TIMEOUT=30
# CONFIG_PPC_VAS is not set
# CONFIG_PPC_PSERIES is not set
# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set
@@ -293,6 +294,7 @@ CONFIG_LIBCRC32C=y
CONFIG_PRINTK_TIME=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_DEBUG_STACKOVERFLOW=y
+CONFIG_PANIC_ON_OOPS=y
CONFIG_SOFTLOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y
CONFIG_HARDLOCKUP_DETECTOR=y
@@ -301,5 +303,4 @@ CONFIG_WQ_WATCHDOG=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_FTRACE is not set
CONFIG_XMON=y
-CONFIG_XMON_DEFAULT=y
# CONFIG_RUNTIME_TESTING_MENU is not set
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
` (6 preceding siblings ...)
2020-01-16 1:48 ` [RFC PATCH 8/9] powerpc/configs/skiroot: Disable xmon default & enable reboot on panic Michael Ellerman
@ 2020-01-16 1:48 ` Michael Ellerman
2020-01-16 1:51 ` Joel Stanley
2020-01-16 1:54 ` [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Joel Stanley
8 siblings, 1 reply; 21+ messages in thread
From: Michael Ellerman @ 2020-01-16 1:48 UTC (permalink / raw)
To: linuxppc-dev; +Cc: joel, dja
Enable more hardening options.
Note BUG_ON_DATA_CORRUPTION selects DEBUG_LIST and is essentially just
a synonym for it.
DEBUG_SG, DEBUG_NOTIFIERS, DEBUG_LIST, DEBUG_CREDENTIALS and
SCHED_STACK_END_CHECK should all be low overhead and just add a few
extra checks.
Unselecting SLAB_MERGE_DEFAULT causes the SLAB to use more memory, but
the skiroot kernel shouldn't be memory constrained on any of our
systems, all it does is run a small bootloader.
SLAB_FREELIST_RANDOM, and SLUB_DEBUG_ON will add some overhead to the
SLAB allocator, but nothing that should be meaningful for skiroot.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/configs/skiroot_defconfig | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
index 12c96c8b0c1d..59c2de904fda 100644
--- a/arch/powerpc/configs/skiroot_defconfig
+++ b/arch/powerpc/configs/skiroot_defconfig
@@ -23,6 +23,8 @@ CONFIG_EXPERT=y
# CONFIG_AIO is not set
CONFIG_PERF_EVENTS=y
# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLAB_MERGE_DEFAULT is not set
+CONFIG_SLAB_FREELIST_RANDOM=y
CONFIG_SLAB_FREELIST_HARDENED=y
CONFIG_PPC64=y
CONFIG_ALTIVEC=y
@@ -293,6 +295,8 @@ CONFIG_LIBCRC32C=y
# CONFIG_XZ_DEC_SPARC is not set
CONFIG_PRINTK_TIME=y
CONFIG_MAGIC_SYSRQ=y
+CONFIG_SLUB_DEBUG_ON=y
+CONFIG_SCHED_STACK_END_CHECK=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_PANIC_ON_OOPS=y
CONFIG_SOFTLOCKUP_DETECTOR=y
@@ -301,6 +305,10 @@ CONFIG_HARDLOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y
CONFIG_WQ_WATCHDOG=y
# CONFIG_SCHED_DEBUG is not set
+CONFIG_DEBUG_SG=y
+CONFIG_DEBUG_NOTIFIERS=y
+CONFIG_BUG_ON_DATA_CORRUPTION=y
+CONFIG_DEBUG_CREDENTIALS=y
# CONFIG_FTRACE is not set
CONFIG_XMON=y
# CONFIG_RUNTIME_TESTING_MENU is not set
--
2.21.1
^ permalink raw reply related [flat|nested] 21+ messages in thread
* Re: [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options
2020-01-16 1:48 ` [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options Michael Ellerman
@ 2020-01-16 1:51 ` Joel Stanley
2020-01-21 4:21 ` Michael Ellerman
0 siblings, 1 reply; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:51 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> Enable more hardening options.
>
> Note BUG_ON_DATA_CORRUPTION selects DEBUG_LIST and is essentially just
> a synonym for it.
>
> DEBUG_SG, DEBUG_NOTIFIERS, DEBUG_LIST, DEBUG_CREDENTIALS and
> SCHED_STACK_END_CHECK should all be low overhead and just add a few
> extra checks.
>
> Unselecting SLAB_MERGE_DEFAULT causes the SLAB to use more memory, but
> the skiroot kernel shouldn't be memory constrained on any of our
> systems, all it does is run a small bootloader.
Why do we unselect it?
> SLAB_FREELIST_RANDOM, and SLUB_DEBUG_ON will add some overhead to the
> SLAB allocator, but nothing that should be meaningful for skiroot.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
> ---
> arch/powerpc/configs/skiroot_defconfig | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
> index 12c96c8b0c1d..59c2de904fda 100644
> --- a/arch/powerpc/configs/skiroot_defconfig
> +++ b/arch/powerpc/configs/skiroot_defconfig
> @@ -23,6 +23,8 @@ CONFIG_EXPERT=y
> # CONFIG_AIO is not set
> CONFIG_PERF_EVENTS=y
> # CONFIG_COMPAT_BRK is not set
> +# CONFIG_SLAB_MERGE_DEFAULT is not set
> +CONFIG_SLAB_FREELIST_RANDOM=y
> CONFIG_SLAB_FREELIST_HARDENED=y
> CONFIG_PPC64=y
> CONFIG_ALTIVEC=y
> @@ -293,6 +295,8 @@ CONFIG_LIBCRC32C=y
> # CONFIG_XZ_DEC_SPARC is not set
> CONFIG_PRINTK_TIME=y
> CONFIG_MAGIC_SYSRQ=y
> +CONFIG_SLUB_DEBUG_ON=y
> +CONFIG_SCHED_STACK_END_CHECK=y
> CONFIG_DEBUG_STACKOVERFLOW=y
> CONFIG_PANIC_ON_OOPS=y
> CONFIG_SOFTLOCKUP_DETECTOR=y
> @@ -301,6 +305,10 @@ CONFIG_HARDLOCKUP_DETECTOR=y
> CONFIG_BOOTPARAM_HARDLOCKUP_PANIC=y
> CONFIG_WQ_WATCHDOG=y
> # CONFIG_SCHED_DEBUG is not set
> +CONFIG_DEBUG_SG=y
> +CONFIG_DEBUG_NOTIFIERS=y
> +CONFIG_BUG_ON_DATA_CORRUPTION=y
> +CONFIG_DEBUG_CREDENTIALS=y
> # CONFIG_FTRACE is not set
> CONFIG_XMON=y
> # CONFIG_RUNTIME_TESTING_MENU is not set
> --
> 2.21.1
>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 6/9] powerpc/configs/skiroot: Update for symbol movement only
2020-01-16 1:48 ` [PATCH 6/9] powerpc/configs/skiroot: Update for symbol movement only Michael Ellerman
@ 2020-01-16 1:52 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:52 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [RFC PATCH 8/9] powerpc/configs/skiroot: Disable xmon default & enable reboot on panic
2020-01-16 1:48 ` [RFC PATCH 8/9] powerpc/configs/skiroot: Disable xmon default & enable reboot on panic Michael Ellerman
@ 2020-01-16 1:53 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:53 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> If the skiroot kernel crashes we don't want it sitting at an xmon
> prompt forever. Instead it's more helpful to reboot and bring the
> boot loader back up, and if the crash was transient we can then boot
> successfully.
>
> Similarly if we panic we should reboot, with a short timeout in case
> someone is watching the console.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
> ---
> arch/powerpc/configs/skiroot_defconfig | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
> index bd661a9a9410..12c96c8b0c1d 100644
> --- a/arch/powerpc/configs/skiroot_defconfig
> +++ b/arch/powerpc/configs/skiroot_defconfig
> @@ -29,6 +29,7 @@ CONFIG_ALTIVEC=y
> CONFIG_VSX=y
> CONFIG_NR_CPUS=2048
> CONFIG_CPU_LITTLE_ENDIAN=y
> +CONFIG_PANIC_TIMEOUT=30
> # CONFIG_PPC_VAS is not set
> # CONFIG_PPC_PSERIES is not set
> # CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set
> @@ -293,6 +294,7 @@ CONFIG_LIBCRC32C=y
> CONFIG_PRINTK_TIME=y
> CONFIG_MAGIC_SYSRQ=y
> CONFIG_DEBUG_STACKOVERFLOW=y
> +CONFIG_PANIC_ON_OOPS=y
> CONFIG_SOFTLOCKUP_DETECTOR=y
> CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y
> CONFIG_HARDLOCKUP_DETECTOR=y
> @@ -301,5 +303,4 @@ CONFIG_WQ_WATCHDOG=y
> # CONFIG_SCHED_DEBUG is not set
> # CONFIG_FTRACE is not set
> CONFIG_XMON=y
> -CONFIG_XMON_DEFAULT=y
> # CONFIG_RUNTIME_TESTING_MENU is not set
> --
> 2.21.1
>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE
2020-01-16 1:48 ` [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE Michael Ellerman
@ 2020-01-16 1:54 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:54 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> The NET_CADENCE symbol was renamed to NET_VENDOR_CADENCE, so we don't
> need to disable the former, see commit 0df5f81c481e ("net: ethernet:
> Add missing VENDOR to Cadence and Packet Engines symbols").
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
` (7 preceding siblings ...)
2020-01-16 1:48 ` [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options Michael Ellerman
@ 2020-01-16 1:54 ` Joel Stanley
8 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:54 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> The QLGE driver moved to staging in commit 955315b0dc8c ("qlge: Move
> drivers/net/ethernet/qlogic/qlge/ to drivers/staging/qlge/"), meaning
> our defconfigs that enable it have no effect as we don't enable
> CONFIG_STAGING.
>
> It sounds like the device is obsolete, so drop the driver.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 3/9] powerpc/configs: Drop NET_VENDOR_HP which moved to staging
2020-01-16 1:48 ` [PATCH 3/9] powerpc/configs: Drop NET_VENDOR_HP which moved to staging Michael Ellerman
@ 2020-01-16 1:54 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:54 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> The HP network driver moved to staging in commit 52340b82cf1a ("hp100:
> Move 100BaseVG AnyLAN driver to staging") meaning we don't need to
> disable it any more in our defconfigs.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 4/9] powerpc/configs/skiroot: Drop HID_LOGITECH
2020-01-16 1:48 ` [PATCH 4/9] powerpc/configs/skiroot: Drop HID_LOGITECH Michael Ellerman
@ 2020-01-16 1:55 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:55 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> Commit bdd08fff4915 ("HID: logitech: Add depends on LEDS_CLASS to
> Logitech Kconfig entry") made HID_LOGITECH depend on LEDS_CLASS which
> we do not enable, meaning we are not actually enabling those drivers
> any more.
>
> The Kconfig help text suggests USB HID compliant Logictech devices
> will continue to work without HID_LOGITECH, so just drop it.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 5/9] powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV
2020-01-16 1:48 ` [PATCH 5/9] powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV Michael Ellerman
@ 2020-01-16 1:55 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 1:55 UTC (permalink / raw)
To: Michael Ellerman; +Cc: linuxppc-dev, Daniel Axtens
On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>
> It's default n so we don't need to disable it.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Joel Stanley <joel@jms.id.au>
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 7/9] powerpc/configs/skiroot: Enable security features
2020-01-16 1:48 ` [PATCH 7/9] powerpc/configs/skiroot: Enable security features Michael Ellerman
@ 2020-01-16 5:00 ` Daniel Axtens
2020-01-16 7:10 ` Oliver O'Halloran
0 siblings, 1 reply; 21+ messages in thread
From: Daniel Axtens @ 2020-01-16 5:00 UTC (permalink / raw)
To: Michael Ellerman, linuxppc-dev; +Cc: nayna, oohall, joel
Michael Ellerman <mpe@ellerman.id.au> writes:
> From: Joel Stanley <joel@jms.id.au>
>
> This turns on HARDENED_USERCOPY with HARDENED_USERCOPY_PAGESPAN, and
> FORTIFY_SOURCE.
>
> It also enables SECURITY_LOCKDOWN_LSM with _EARLY and
> LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY options enabled.
>
As I said before, this will disable xmon entirely. If we want to set
this, we should compile out xmon. But if we want xmon in read-only mode
to be an option, we should pick integrity mode.
I don't really mind, because I don't work with skiroot very
much. Oliver, Joel, Nayna, you all do stuff around this sort of level -
is this a problem for any of you?
Regards,
Daniel
> MODULE_SIG is selected by lockdown, so it is still enabled.
>
> Signed-off-by: Joel Stanley <joel@jms.id.au>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
> ---
> arch/powerpc/configs/skiroot_defconfig | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/configs/skiroot_defconfig b/arch/powerpc/configs/skiroot_defconfig
> index 24a210fe0049..bd661a9a9410 100644
> --- a/arch/powerpc/configs/skiroot_defconfig
> +++ b/arch/powerpc/configs/skiroot_defconfig
> @@ -49,7 +49,6 @@ CONFIG_JUMP_LABEL=y
> CONFIG_STRICT_KERNEL_RWX=y
> CONFIG_MODULES=y
> CONFIG_MODULE_UNLOAD=y
> -CONFIG_MODULE_SIG=y
> CONFIG_MODULE_SIG_FORCE=y
> CONFIG_MODULE_SIG_SHA512=y
> CONFIG_PARTITION_ADVANCED=y
> @@ -272,6 +271,16 @@ CONFIG_NLS_ASCII=y
> CONFIG_NLS_ISO8859_1=y
> CONFIG_NLS_UTF8=y
> CONFIG_ENCRYPTED_KEYS=y
> +CONFIG_SECURITY=y
> +CONFIG_HARDENED_USERCOPY=y
> +# CONFIG_HARDENED_USERCOPY_FALLBACK is not set
> +CONFIG_HARDENED_USERCOPY_PAGESPAN=y
> +CONFIG_FORTIFY_SOURCE=y
> +CONFIG_SECURITY_LOCKDOWN_LSM=y
> +CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y
> +CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY=y
> +# CONFIG_INTEGRITY is not set
> +CONFIG_LSM="yama,loadpin,safesetid,integrity"
> # CONFIG_CRYPTO_HW is not set
> CONFIG_CRC16=y
> CONFIG_CRC_ITU_T=y
> --
> 2.21.1
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 7/9] powerpc/configs/skiroot: Enable security features
2020-01-16 5:00 ` Daniel Axtens
@ 2020-01-16 7:10 ` Oliver O'Halloran
2020-01-16 7:14 ` Joel Stanley
0 siblings, 1 reply; 21+ messages in thread
From: Oliver O'Halloran @ 2020-01-16 7:10 UTC (permalink / raw)
To: Daniel Axtens; +Cc: Nayna Jain, Joel Stanley, linuxppc-dev
On Thu, Jan 16, 2020 at 4:00 PM Daniel Axtens <dja@axtens.net> wrote:
>
> Michael Ellerman <mpe@ellerman.id.au> writes:
>
> > From: Joel Stanley <joel@jms.id.au>
> >
> > This turns on HARDENED_USERCOPY with HARDENED_USERCOPY_PAGESPAN, and
> > FORTIFY_SOURCE.
> >
> > It also enables SECURITY_LOCKDOWN_LSM with _EARLY and
> > LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY options enabled.
> >
>
> As I said before, this will disable xmon entirely. If we want to set
> this, we should compile out xmon. But if we want xmon in read-only mode
> to be an option, we should pick integrity mode.
>
> I don't really mind, because I don't work with skiroot very
> much. Oliver, Joel, Nayna, you all do stuff around this sort of level -
> is this a problem for any of you?
Keep it enabled and force INTEGRITY mode. There are some cases where
xmon is the only method for debugging a crashing skiroot (hello SMC
BMCs) so I'd rather it remained available. If there's some actual
security benefit to disabling it entirely then someone should
articulate that.
Oliver
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [PATCH 7/9] powerpc/configs/skiroot: Enable security features
2020-01-16 7:10 ` Oliver O'Halloran
@ 2020-01-16 7:14 ` Joel Stanley
0 siblings, 0 replies; 21+ messages in thread
From: Joel Stanley @ 2020-01-16 7:14 UTC (permalink / raw)
To: Oliver O'Halloran; +Cc: linuxppc-dev, Nayna Jain, Daniel Axtens
On Thu, 16 Jan 2020 at 07:10, Oliver O'Halloran <oohall@gmail.com> wrote:
>
> On Thu, Jan 16, 2020 at 4:00 PM Daniel Axtens <dja@axtens.net> wrote:
> >
> > Michael Ellerman <mpe@ellerman.id.au> writes:
> >
> > > From: Joel Stanley <joel@jms.id.au>
> > >
> > > This turns on HARDENED_USERCOPY with HARDENED_USERCOPY_PAGESPAN, and
> > > FORTIFY_SOURCE.
> > >
> > > It also enables SECURITY_LOCKDOWN_LSM with _EARLY and
> > > LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY options enabled.
> > >
> >
> > As I said before, this will disable xmon entirely. If we want to set
> > this, we should compile out xmon. But if we want xmon in read-only mode
> > to be an option, we should pick integrity mode.
> >
> > I don't really mind, because I don't work with skiroot very
> > much. Oliver, Joel, Nayna, you all do stuff around this sort of level -
> > is this a problem for any of you?
>
> Keep it enabled and force INTEGRITY mode. There are some cases where
> xmon is the only method for debugging a crashing skiroot (hello SMC
> BMCs) so I'd rather it remained available. If there's some actual
> security benefit to disabling it entirely then someone should
> articulate that.
Ack.
^ permalink raw reply [flat|nested] 21+ messages in thread
* Re: [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options
2020-01-16 1:51 ` Joel Stanley
@ 2020-01-21 4:21 ` Michael Ellerman
0 siblings, 0 replies; 21+ messages in thread
From: Michael Ellerman @ 2020-01-21 4:21 UTC (permalink / raw)
To: Joel Stanley; +Cc: linuxppc-dev, Daniel Axtens
Joel Stanley <joel@jms.id.au> writes:
> On Thu, 16 Jan 2020 at 01:48, Michael Ellerman <mpe@ellerman.id.au> wrote:
>>
>> Enable more hardening options.
>>
>> Note BUG_ON_DATA_CORRUPTION selects DEBUG_LIST and is essentially just
>> a synonym for it.
>>
>> DEBUG_SG, DEBUG_NOTIFIERS, DEBUG_LIST, DEBUG_CREDENTIALS and
>> SCHED_STACK_END_CHECK should all be low overhead and just add a few
>> extra checks.
>>
>> Unselecting SLAB_MERGE_DEFAULT causes the SLAB to use more memory, but
>> the skiroot kernel shouldn't be memory constrained on any of our
>> systems, all it does is run a small bootloader.
>
> Why do we unselect it?
The help text pretty much explains it:
config SLAB_MERGE_DEFAULT
bool "Allow slab caches to be merged"
default y
help
For reduced kernel memory fragmentation, slab caches can be
merged when they share the same size and other characteristics.
This carries a risk of kernel heap overflows being able to
overwrite objects from merged caches (and more easily control
cache layout), which makes such heap attacks easier to exploit
by attackers. By keeping caches unmerged, these kinds of exploits
can usually only damage objects in the same cache. To disable
merging at runtime, "slab_nomerge" can be passed on the kernel
command line.
So unselecting it uses a bit more memory but has some
security/robustness benefit.
I should probably also mention that it essentially has no effect because
we're also enabling SLUB_DEBUG_ON, and that causes some of the flags in
SLAB_NEVER_MERGE to be set, which also disables merging.
cheers
^ permalink raw reply [flat|nested] 21+ messages in thread
end of thread, other threads:[~2020-01-21 4:23 UTC | newest]
Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-16 1:48 [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Michael Ellerman
2020-01-16 1:48 ` [PATCH 2/9] powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE Michael Ellerman
2020-01-16 1:54 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 3/9] powerpc/configs: Drop NET_VENDOR_HP which moved to staging Michael Ellerman
2020-01-16 1:54 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 4/9] powerpc/configs/skiroot: Drop HID_LOGITECH Michael Ellerman
2020-01-16 1:55 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 5/9] powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV Michael Ellerman
2020-01-16 1:55 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 6/9] powerpc/configs/skiroot: Update for symbol movement only Michael Ellerman
2020-01-16 1:52 ` Joel Stanley
2020-01-16 1:48 ` [PATCH 7/9] powerpc/configs/skiroot: Enable security features Michael Ellerman
2020-01-16 5:00 ` Daniel Axtens
2020-01-16 7:10 ` Oliver O'Halloran
2020-01-16 7:14 ` Joel Stanley
2020-01-16 1:48 ` [RFC PATCH 8/9] powerpc/configs/skiroot: Disable xmon default & enable reboot on panic Michael Ellerman
2020-01-16 1:53 ` Joel Stanley
2020-01-16 1:48 ` [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options Michael Ellerman
2020-01-16 1:51 ` Joel Stanley
2020-01-21 4:21 ` Michael Ellerman
2020-01-16 1:54 ` [PATCH 1/9] powerpc/configs: Drop CONFIG_QLGE which moved to staging Joel Stanley
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.