From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxppc-dev@ozlabs.org
Cc: joel@jms.id.au, dja@axtens.net
Subject: [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options
Date: Thu, 16 Jan 2020 11:48:08 +1000 [thread overview]
Message-ID: <20200116014808.15756-9-mpe@ellerman.id.au> (raw)
In-Reply-To: <20200116014808.15756-1-mpe@ellerman.id.au>
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
next prev parent reply other threads:[~2020-01-16 2:06 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
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 ` Michael Ellerman [this message]
2020-01-16 1:51 ` [RFC PATCH 9/9] powerpc/configs/skiroot: Enable some more hardening options 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
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