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Kees Cook 234c12e7b2 UPSTREAM: bug: Provide toggle for BUG on data corruption 
(cherry-picked from de54ebbe26)

The kernel checks for cases of data structure corruption under some
CONFIGs (e.g. CONFIG_DEBUG_LIST). When corruption is detected, some
systems may want to BUG() immediately instead of letting the system run
with known corruption.  Usually these kinds of manipulation primitives can
be used by security flaws to gain arbitrary memory write control. This
provides a new config CONFIG_BUG_ON_DATA_CORRUPTION and a corresponding
macro CHECK_DATA_CORRUPTION for handling these situations. Notably, even
if not BUGing, the kernel should not continue processing the corrupted
structure.

This is inspired by similar hardening by Syed Rameez Mustafa in MSM
kernels, and in PaX and Grsecurity, which is likely in response to earlier
removal of the BUG calls in commit 924d9addb9 ("list debugging: use
WARN() instead of BUG()").

Change-Id: I4cdfa9fbebe32a990a111d051e4ec4e421f77a09
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Satya Tangirala <satyat@google.com>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
2018-10-04 14:19:10 +05:30
..
acpi
asm-generic Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
clocksource
crypto Merge remote-tracking branch 'origin/upstream-f2fs-stable-linux-4.4.y' into android-4.4 2018-10-04 13:56:15 +05:30
drm drm: Add DP PSR2 sink enable bit 2018-08-06 16:24:39 +02:00
dt-bindings ARM: dts: Fix omap3 off mode pull defines 2017-11-21 09:21:19 +01:00
keys
kvm
linux UPSTREAM: bug: Provide toggle for BUG on data corruption 2018-10-04 14:19:10 +05:30
math-emu
media
memory
misc
net Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
pcmcia
ras
rdma IB/core: Make testing MR flags for writability a static inline function 2018-08-15 17:42:06 +02:00
rxrpc
scsi scsi: sg: disable SET_FORCE_LOW_DMA 2018-01-23 19:50:14 +01:00
soc memory: tegra: Apply interrupts mask per SoC 2018-08-06 16:24:38 +02:00
sound ALSA: control: Hardening for potential Spectre v1 2018-05-02 07:53:41 -07:00
target target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK 2018-01-17 09:35:31 +01:00
trace Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-06-11 16:48:21 +05:30
uapi FROMLIST: ANDROID: binder: Add BINDER_GET_NODE_INFO_FOR_REF ioctl. 2018-10-04 14:18:25 +05:30
video Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android 2018-10-03 15:00:28 +05:30
xen fix xen_swiotlb_dma_mmap prototype 2017-10-05 09:41:48 +02:00
Kbuild