linux/include
Victor Chibotaru ded97d2c2b kcov: support comparison operands collection
Enables kcov to collect comparison operands from instrumented code.
This is done by using Clang's -fsanitize=trace-cmp instrumentation
(currently not available for GCC).

The comparison operands help a lot in fuzz testing.  E.g.  they are used
in Syzkaller to cover the interiors of conditional statements with way
less attempts and thus make previously unreachable code reachable.

To allow separate collection of coverage and comparison operands two
different work modes are implemented.  Mode selection is now done via a
KCOV_ENABLE ioctl call with corresponding argument value.

Link: http://lkml.kernel.org/r/20171011095459.70721-1-glider@google.com
Signed-off-by: Victor Chibotaru <tchibo@google.com>
Signed-off-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Popov <alex.popov@linux.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: <syzkaller@googlegroups.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-17 16:10:04 -08:00
..
acpi TTY/Serial patches for 4.15-rc1 2017-11-13 21:05:31 -08:00
asm-generic bug: fix "cut here" location for __WARN_TAINT architectures 2017-11-17 16:10:01 -08:00
clocksource arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-11-14 10:52:09 -08:00
drm main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
dt-bindings ARM: SoC driver updates for v4.15 2017-11-16 16:05:01 -08:00
keys License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kvm KVM: arm/arm64: Rework kvm_timer_should_fire 2017-11-06 16:23:17 +01:00
lib lib: Add shared copies of some GCC library routines 2017-09-25 15:50:57 -07:00
linux kcov: support comparison operands collection 2017-11-17 16:10:04 -08:00
math-emu math-emu: fix floating-point to integer overflow detection 2014-01-07 18:36:24 -06:00
media media updates for v4.15-rc1 2017-11-15 20:30:12 -08:00
memory ddr: add LPDDR2 data from JESD209-2 2012-05-02 00:04:06 -07:00
misc cxl: Export library to support IBM XSL 2017-07-03 23:07:03 +10:00
net Merge branch 'akpm' (patches from Andrew) 2017-11-15 19:42:40 -08:00
pcmcia pcmcia/ds.h: introduce helper for pcmcia_driver module boilerplate 2013-03-15 12:26:03 -07:00
ras License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rdma Updates for 4.15 kernel merge window 2017-11-15 14:54:53 -08:00
scsi SCSI misc on 20171114 2017-11-14 16:23:44 -08:00
soc firmware: tegra: Add BPMP debugfs support 2017-10-19 16:27:56 +02:00
sound ASoC: Updates for v4.15 2017-11-13 15:45:57 +01:00
target A couple of configfs cleanups: 2017-11-14 14:44:04 -08:00
trace libnvdimm for 4.15 2017-11-17 09:51:57 -08:00
uapi kcov: support comparison operands collection 2017-11-17 16:10:04 -08:00
video License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen xen: features and fixes for v4.15-rc1 2017-11-16 13:06:27 -08:00