Marco Elver 0e1aa5b621 kcsan: Restrict supported compilers ... The first version of Clang that supports -tsan-distinguish-volatile will be able to support KCSAN. The first Clang release to do so, will be Clang 11. This is due to satisfying all the following requirements: 1. Never emit calls to __tsan_func_{entry,exit}. 2. __no_kcsan functions should not call anything, not even kcsan_{enable,disable}_current(), when using __{READ,WRITE}_ONCE => Requires leaving them plain! 3. Support atomic_{read,set}*() with KCSAN, which rely on arch_atomic_{read,set}*() using __{READ,WRITE}_ONCE() => Because of #2, rely on Clang 11's -tsan-distinguish-volatile support. We will double-instrument atomic_{read,set}*(), but that's reasonable given it's still lower cost than the data_race() variant due to avoiding 2 extra calls (kcsan_{en,dis}able_current() calls). 4. __always_inline functions inlined into __no_kcsan functions are never instrumented. 5. __always_inline functions inlined into instrumented functions are instrumented. 6. __no_kcsan_or_inline functions may be inlined into __no_kcsan functions => Implies leaving 'noinline' off of __no_kcsan_or_inline. 7. Because of #6, __no_kcsan and __no_kcsan_or_inline functions should never be spuriously inlined into instrumented functions, causing the accesses of the __no_kcsan function to be instrumented. Older versions of Clang do not satisfy #3. The latest GCC currently doesn't support at least #1, #3, and #7. Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/CANpmjNMTsY_8241bS7=XAfqvZHFLrVEkv_uM4aDUWE_kh3Rvbw@mail.gmail.com Link: https://lkml.kernel.org/r/20200521142047.169334-7-elver@google.com		2020-06-11 20:04:00 +02:00
..
842
crypto	crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h	2020-05-08 15:32:17 +10:00
dim	lib/dim: Fix -Wunused-const-variable warnings	2019-07-25 11:34:39 -07:00
fonts
kunit	kunit: default KUNIT_* fragments to KUNIT_ALL_TESTS	2020-06-01 14:23:25 -06:00
livepatch	livepatch/samples/selftest: Use klp_shadow_alloc() API correctly	2020-01-17 11:12:06 +01:00
lz4	lz4: do not export static symbol	2019-09-20 09:06:26 -07:00
lzo	lib/lzo/lzo1x_compress.c: fix alignment bug in lzo-rle	2019-09-25 17:51:41 -07:00
math	linux-kselftest-5.8-rc1	2020-06-09 10:03:12 -07:00
mpi	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2020-06-01 12:00:10 -07:00
raid6	x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2	2020-04-09 00:12:48 +09:00
reed_solomon
vdso	lib/vdso: Enable common headers	2020-03-21 15:24:03 +01:00
xz	lib/xz: fix XZ_DYNALLOC to avoid useless memory reallocations	2019-11-15 18:34:00 -08:00
zlib_deflate	lib/zlib: add zlib_deflate_dfltcc_enabled() function	2020-01-31 10:30:40 -08:00
zlib_dfltcc	lib/zlib: add zlib_deflate_dfltcc_enabled() function	2020-01-31 10:30:40 -08:00
zlib_inflate	lib/zlib: remove outdated and incorrect pre-increment optimization	2020-06-04 19:06:25 -07:00
zstd	lib/zstd/mem.h: replace __inline by inline	2019-09-15 19:42:16 +02:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
argv_split.c
ashldi3.c
ashrdi3.c
asn1_decoder.c
assoc_array.c
atomic64.c
atomic64_test.c
audit.c
bcd.c
bch.c	lib/bch: Allow easy bit swapping	2020-05-24 20:48:11 +02:00
bitmap.c	lib: bitmap.c: get rid of some doc warnings	2020-04-20 15:45:41 -06:00
bitrev.c
bootconfig.c	tools/bootconfig: Show line and column in parse error	2020-03-03 17:38:42 -05:00
bsearch.c	lib/bsearch: Use generic type for comparator function	2019-11-14 13:15:11 -05:00
btree.c
bucket_locks.c
bug.c	ftrace,bug: Improve traceoff_on_warn	2020-06-01 08:23:42 -04:00
build_OID_registry
bust_spinlocks.c
check_signature.c
checksum.c	take the dummy csum_and_copy_from_user() into net/checksum.h	2020-05-29 16:11:50 -04:00
clz_ctz.c
clz_tab.c
cmdline.c
cmpdi2.c
compat_audit.c
cpu_rmap.c	lib: cpu_rmap: Use pr_warn instead of pr_warning	2019-10-18 15:01:57 +02:00
cpumask.c	sched/core: Distribute tasks within affinity masks	2020-03-20 13:06:18 +01:00
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c
crc4.c
crc7.c
crc8.c
crc16.c
crc32.c
crc32defs.h
crc32test.c
crc64.c	lib: crc64: include <linux/crc64.h> for 'crc64_be'	2020-01-23 11:40:01 -07:00
ctype.c
debug_info.c
debug_locks.c	lockdep: Prepare for noinstr sections	2020-05-19 15:47:21 +02:00
debugobjects.c	debugobjects: Fix various data races	2020-01-17 15:45:01 +01:00
dec_and_lock.c
decompress.c
decompress_bunzip2.c
decompress_inflate.c	lib/zlib: add s390 hardware support for kernel zlib_inflate	2020-01-31 10:30:40 -08:00
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c
devres.c	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
digsig.c
dump_stack.c	kernel: rename show_stack_loglvl() => show_stack()	2020-06-09 09:39:13 -07:00
dynamic_debug.c	dynamic_debug: add an option to enable dynamic debug for modules only	2020-06-08 11:05:56 -07:00
dynamic_queue_limits.c
earlycpio.c
errname.c	printf: add support for printing symbolic error names	2019-10-17 16:23:25 +02:00
error-inject.c
errseq.c
extable.c	lib/extable.c: add missing prototypes	2019-09-25 17:51:39 -07:00
fault-inject.c	fault_inject: Don't rely on "return value" from WRITE_ONCE()	2020-04-15 21:36:41 +01:00
fdt.c
fdt_addresses.c	libfdt: include fdt_addresses.c	2020-01-08 16:59:19 +00:00
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
find_bit.c	lib/find_bit.c: uninline helper _find_next_bit()	2020-01-31 10:30:41 -08:00
find_bit_benchmark.c
flex_proportions.c	lib/flex_proportions.c: cleanup __fprop_inc_percpu_max	2020-06-04 19:06:25 -07:00
gen_crc32table.c
gen_crc64table.c
genalloc.c	lib/genalloc.c: rename addr_in_gen_pool to gen_pool_has_addr	2019-12-04 19:44:13 -08:00
generic-radix-tree.c	lib/generic-radix-tree.c: add kmemleak annotations	2019-10-14 15:04:00 -07:00
glob.c
globtest.c
hexdump.c	lib/hexdump: make print_hex_dump_bytes() a nop on !DEBUG builds	2019-09-25 17:51:39 -07:00
hweight.c
idr.c	idr: Fix idr_get_next_ul race with idr_remove	2019-11-01 22:26:34 -04:00
inflate.c
interval_tree.c
interval_tree_test.c
iomap.c
iomap_copy.c
iommu-helper.c
ioremap.c	mm: don't include asm/pgtable.h if linux/mm.h is already included	2020-06-09 09:39:13 -07:00
iov_iter.c	iov_iter: Use generic instrumented.h	2020-03-21 09:41:55 +01:00
irq_poll.c
irq_regs.c
is_single_threaded.c
kasprintf.c
Kconfig	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
Kconfig.debug	Rebase locking/kcsan to locking/urgent	2020-06-11 20:02:46 +02:00
Kconfig.kasan	kasan: support backing vmalloc space with real shadow memory	2019-12-01 12:59:05 -08:00
Kconfig.kcsan	kcsan: Restrict supported compilers	2020-06-11 20:04:00 +02:00
Kconfig.kgdb	kgdb: Delay "kgdbwait" to dbg_late_init() by default	2020-05-18 17:49:27 +01:00
Kconfig.ubsan	ubsan, kcsan: Don't combine sanitizer with kcov on clang	2020-06-11 20:03:59 +02:00
kfifo.c	Partially revert "kfifo: fix kfifo_alloc() and kfifo_init()"	2019-08-30 18:47:15 -07:00
klist.c
kobject.c	Driver core patches for 5.8-rc1	2020-06-07 10:53:36 -07:00
kobject_uevent.c
kstrtox.c
kstrtox.h
libcrc32c.c
linear_ranges.c	lib: linear_ranges: Add missing MODULE_LICENSE()	2020-05-11 11:55:28 +01:00
list-test.c	Fix linked-list KUnit test when run multiple times	2020-03-25 16:38:39 -06:00
list_debug.c
list_sort.c
llist.c
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-rtmutex.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c	locking/lockdep: Remove unused @nested argument from lock_release()	2019-10-09 12:46:10 +02:00
lockref.c
logic_pio.c	logic_pio: Use _inX() and _outX()	2020-05-07 14:54:26 +08:00
lru_cache.c
lshrdi3.c
Makefile	Rebase locking/kcsan to locking/urgent	2020-06-11 20:02:46 +02:00
memcat_p.c
memory-notifier-error-inject.c
memregion.c	lib: Uplevel the pmem "region" ida to a global allocator	2019-11-07 15:44:29 +01:00
memweight.c
muldi3.c
net_utils.c
netdev-notifier-error-inject.c
nlattr.c	netlink: factor out policy range helpers	2020-04-30 17:51:42 -07:00
nmi_backtrace.c
nodemask.c
notifier-error-inject.c
notifier-error-inject.h
objagg.c	lib: objagg: Replace zero-length arrays with flexible-array member	2020-02-16 18:33:00 -08:00
of-reconfig-notifier-error-inject.c
oid_registry.c
once.c
packing.c
parman.c
parser.c
pci_iomap.c
percpu-refcount.c	lib/percpu-refcount.c: use a more common logging style	2020-06-04 19:06:25 -07:00
percpu_counter.c
percpu_test.c
plist.c
pm-notifier-error-inject.c
radix-tree.c	radix-tree: Use local_lock for protection	2020-05-28 10:31:09 +02:00
random32.c
ratelimit.c
rbtree.c	lib/rbtree: fix coding style of assignments	2020-04-07 10:43:43 -07:00
rbtree_test.c	augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro	2019-09-25 17:51:39 -07:00
refcount.c	locking/refcount: Consolidate implementations of refcount_t	2019-11-25 09:15:32 +01:00
rhashtable.c	rhashtable: Drop raw RCU deref in nested_table_free	2020-06-06 15:51:17 -07:00
sbitmap.c	sbitmap: only queue kyber's wait callback if not already active	2019-12-20 16:51:54 -07:00
scatterlist.c	lib/scatterlist: fix sg_copy_buffer() kerneldoc	2020-04-07 10:43:43 -07:00
seq_buf.c	seq_buf: Add printing formatted hex dumps	2019-11-14 13:15:12 -05:00
sg_pool.c
sg_split.c	lib: scatterlist: Fix to support no mapped sg	2019-08-08 07:45:01 -06:00
sha1.c	crypto: lib/sha1 - fold linux/cryptohash.h into crypto/sha.h	2020-05-08 15:32:17 +10:00
show_mem.c	mm: remove quicklist page table caches	2019-09-24 15:54:09 -07:00
siphash.c
smp_processor_id.c	lib/smp_processor_id: Don't use cpumask_equal()	2019-10-09 12:46:10 +02:00
sort.c	lib/sort: Move swap, cmp and cmp_r function types for wider use	2019-11-14 13:15:11 -05:00
stackdepot.c	kasan: stackdepot: move filter_irq_stacks() to stackdepot.c	2020-04-07 10:43:43 -07:00
stmp_device.c
string.c	lib/string.c: update match_string() doc-strings with correct behavior	2020-02-21 11:22:15 -08:00
string_helpers.c	lib/string_helpers: fix some kerneldoc warnings	2019-07-16 19:23:22 -07:00
strncpy_from_user.c	lib: Add might_fault() to strncpy_from_user.	2020-06-04 19:06:25 -07:00
strnlen_user.c	uaccess: Selectively open read or write user access	2020-05-01 12:35:21 +10:00
syscall.c
test-kstrtox.c
test-string_helpers.c
test_bitfield.c
test_bitmap.c	lib/test_bitmap.c: make use of EXP2_IN_BITS	2020-04-07 10:43:43 -07:00
test_bitops.c	lib: make a test module with set/clear bit	2020-06-04 19:06:25 -07:00
test_blackhole_dev.c
test_bpf.c	bpf/tests: Use migrate disable instead of preempt disable	2020-02-24 16:20:09 -08:00
test_debug_virtual.c
test_firmware.c	test_firmware: remove unnecessary test_fw_mutex in test_dev_config_show_xxx	2020-04-17 09:59:39 +02:00
test_hash.c
test_hexdump.c
test_hmm.c	mmap locking API: convert mmap_sem call sites missed by coccinelle	2020-06-09 09:39:14 -07:00
test_hmm_uapi.h	mm/hmm/test: add selftest driver for HMM	2020-05-19 16:48:30 -03:00
test_ida.c
test_kasan.c	kasan: stop tests being eliminated as dead code with FORTIFY_SOURCE	2020-06-03 20:09:42 -07:00
test_kmod.c	lib/test_kmod.c: remove a NULL test	2020-04-07 10:43:43 -07:00
test_linear_ranges.c	lib/test_linear_ranges: add a test for the 'linear_ranges'	2020-05-08 18:18:12 +01:00
test_list_sort.c
test_lockup.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
test_memcat_p.c
test_meminit.c	lib/test_meminit.c: add bulk alloc/free tests	2019-12-04 19:44:13 -08:00
test_min_heap.c	lib: Introduce generic min-heap	2020-03-06 11:56:59 +01:00
test_module.c
test_objagg.c
test_overflow.c	lib/test_overflow.c: avoid tainting the kernel and fix wrap size	2019-07-16 19:23:22 -07:00
test_parman.c
test_printf.c	Driver core patches for 5.8-rc1	2020-06-07 10:53:36 -07:00
test_rhashtable.c
test_siphash.c
test_sort.c
test_stackinit.c	lib: test_stackinit.c: XFAIL switch variable init tests	2020-04-07 10:43:43 -07:00
test_static_key_base.c
test_static_keys.c
test_string.c	lib/test_string.c: add some testcases for strchr and strnchr	2019-07-16 19:23:22 -07:00
test_strscpy.c
test_sysctl.c	linux-kselftest-5.8-rc1	2020-06-09 10:03:12 -07:00
test_ubsan.c
test_user_copy.c	usercopy: Avoid soft lockups in test_check_nonzero_user()	2019-10-16 14:56:21 +02:00
test_uuid.c
test_vmalloc.c	mm: switch the test_vmalloc module to use __vmalloc_node	2020-06-02 10:59:11 -07:00
test_xarray.c	XArray: Fix xas_pause for large multi-index entries	2020-01-31 15:09:49 -05:00
textsearch.c	lib: textsearch: fix escapes in example code	2019-10-03 12:12:23 -04:00
timerqueue.c	lib/timerqueue: Rely on rbtree semantics for next timer	2019-07-24 17:38:01 +02:00
ts_bm.c	lib/ts_bm.c: replace zero-length array with flexible-array member	2020-04-07 10:43:42 -07:00
ts_fsm.c	lib/ts_fsm.c: replace zero-length array with flexible-array member	2020-04-07 10:43:43 -07:00
ts_kmp.c	lib/ts_kmp.c: replace zero-length array with flexible-array member	2020-04-07 10:43:43 -07:00
ubsan.c	lib/ubsan.c: fix gcc-10 warnings	2020-06-04 19:06:28 -07:00
ubsan.h	int128: move __uint128_t compiler test to Kconfig	2019-11-17 09:02:42 +08:00
ucmpdi2.c
ucs2_string.c
usercopy.c	Rebase locking/kcsan to locking/urgent	2020-06-11 20:02:46 +02:00
uuid.c	uuid: Provide a GUID generator for raw buffer	2020-03-23 17:01:47 +01:00
vsprintf.c	Printk changes for 5.8	2020-06-01 12:13:30 -07:00
win_minmax.c
xarray.c	xarray: Fix early termination of xas_for_each_marked	2020-03-12 17:42:08 -04:00
xxhash.c