Linus Torvalds e7901af143 This includes fixes for seq_buf_bprintf() truncation issue. It also ... contains fixes to ftrace when /proc/sys/kernel/ftrace_enabled and function tracing are started. Doing the following causes some issues: # echo 0 > /proc/sys/kernel/ftrace_enabled # echo function_graph > /sys/kernel/debug/tracing/current_tracer # echo 1 > /proc/sys/kernel/ftrace_enabled # echo nop > /sys/kernel/debug/tracing/current_tracer # echo function_graph > /sys/kernel/debug/tracing/current_tracer As well as with function tracing too. Pratyush Anand first reported this issue to me and supplied a patch. When I tested this on my x86 test box, it caused thousands of backtraces and warnings to appear in dmesg, which also caused a denial of service (a warning for every function that was listed). I applied Pratyush's patch but it did not fix the issue for me. I looked into it and found a slight problem with trampoline accounting. I fixed it and sent Pratyush a patch, but he said that it did not fix the issue for him. I later learned tha Pratyush was using an ARM64 server, and when I tested on my ARM board, I was able to reproduce the same issue as Pratyush. After applying his patch, it fixed the problem. The above test uncovered two different bugs, one in x86 and one in ARM and ARM64. As this looked like it would affect PowerPC, I tested it on my PPC64 box. It too broke, but neither the patch that fixed ARM or x86 fixed this box (the changes were all in generic code!). The above test, uncovered two more bugs that affected PowerPC. Again, the changes were only done to generic code. It's the way the arch code expected things to be done that was different between the archs. Some where more sensitive than others. The rest of this series fixes the PPC bugs as well. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJU/cQSAAoJEEjnJuOKh9lde9sH/1MAPq+6jr7YaEFru0GKajE9 rVHjw8rde/I4tN2UxIVk+Qm6pXRZYpv3OKxHT48EHzkvgm++voioykpJP4IEVrP5 mEDuIcYe28csE2nV5u5Q9kwnZoC86TQW5nVV6zB1Gx/3IEzA8Z046jAov40Jya0y zqHc/U43JeeVIDIOkwjzbH6OaFEDP13FkF3TO502WJhJLqMo+kPOalIgv0eauKzy lVCQBSC4WS3rVsgW4W3dSrEBaUxbJxgunjxOuV2DwHj5eghHq0M2MKeIUxBz0PuN wnhTrpf5cAfshTvYHxKlE0uItdyYfVb7UChAD5zTbBL4kMUFhpb183zVKH8K8kU= =8R8y -----END PGP SIGNATURE----- Merge tag 'trace-fixes-v4.0-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull seq-buf/ftrace fixes from Steven Rostedt: "This includes fixes for seq_buf_bprintf() truncation issue. It also contains fixes to ftrace when /proc/sys/kernel/ftrace_enabled and function tracing are started. Doing the following causes some issues: # echo 0 > /proc/sys/kernel/ftrace_enabled # echo function_graph > /sys/kernel/debug/tracing/current_tracer # echo 1 > /proc/sys/kernel/ftrace_enabled # echo nop > /sys/kernel/debug/tracing/current_tracer # echo function_graph > /sys/kernel/debug/tracing/current_tracer As well as with function tracing too. Pratyush Anand first reported this issue to me and supplied a patch. When I tested this on my x86 test box, it caused thousands of backtraces and warnings to appear in dmesg, which also caused a denial of service (a warning for every function that was listed). I applied Pratyush's patch but it did not fix the issue for me. I looked into it and found a slight problem with trampoline accounting. I fixed it and sent Pratyush a patch, but he said that it did not fix the issue for him. I later learned tha Pratyush was using an ARM64 server, and when I tested on my ARM board, I was able to reproduce the same issue as Pratyush. After applying his patch, it fixed the problem. The above test uncovered two different bugs, one in x86 and one in ARM and ARM64. As this looked like it would affect PowerPC, I tested it on my PPC64 box. It too broke, but neither the patch that fixed ARM or x86 fixed this box (the changes were all in generic code!). The above test, uncovered two more bugs that affected PowerPC. Again, the changes were only done to generic code. It's the way the arch code expected things to be done that was different between the archs. Some where more sensitive than others. The rest of this series fixes the PPC bugs as well" * tag 'trace-fixes-v4.0-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace: Fix ftrace enable ordering of sysctl ftrace_enabled ftrace: Fix en(dis)able graph caller when en(dis)abling record via sysctl ftrace: Clear REGS_EN and TRAMP_EN flags on disabling record via sysctl seq_buf: Fix seq_buf_bprintf() truncation seq_buf: Fix seq_buf_vprintf() truncation		2015-03-09 18:44:06 -07:00
..
fonts
lz4
lzo
mpi
raid6
reed_solomon
xz
zlib_deflate
zlib_inflate
.gitignore
argv_split.c
asn1_decoder.c
assoc_array.c
atomic64.c
atomic64_test.c
audit.c
average.c
bcd.c
bch.c
bitmap.c
bitrev.c
bsearch.c
btree.c
bug.c
build_OID_registry
bust_spinlocks.c
check_signature.c
checksum.c
clz_ctz.c
clz_tab.c
cmdline.c
compat_audit.c
cordic.c
cpu-notifier-error-inject.c
cpu_rmap.c
cpumask.c
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c
crc7.c
crc8.c
crc16.c
crc32.c
crc32defs.h
ctype.c
debug_locks.c
debugobjects.c
dec_and_lock.c
decompress.c
decompress_bunzip2.c
decompress_inflate.c
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c
devres.c
digsig.c
div64.c
dma-debug.c
dump_stack.c
dynamic_debug.c
dynamic_queue_limits.c
earlycpio.c
extable.c
fault-inject.c
fdt.c
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
find_last_bit.c
find_next_bit.c
flex_array.c
flex_proportions.c
gcd.c
gen_crc32table.c
genalloc.c
glob.c
halfmd4.c
hexdump.c
hweight.c
idr.c
inflate.c
int_sqrt.c
interval_tree.c
interval_tree_test.c
iomap.c
iomap_copy.c
iommu-helper.c
ioremap.c
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c
Kconfig	Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2015-02-19 10:36:45 -08:00
Kconfig.debug	scripts/gdb: add infrastructure	2015-02-17 14:34:53 -08:00
Kconfig.kasan
Kconfig.kgdb
Kconfig.kmemcheck
kfifo.c
klist.c
kobject.c
kobject_uevent.c
kstrtox.c
kstrtox.h
lcm.c
libcrc32c.c
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-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
lockref.c
lru_cache.c
Makefile
md5.c
memory-notifier-error-inject.c
memweight.c
net_utils.c
nlattr.c
notifier-error-inject.c
notifier-error-inject.h
of-reconfig-notifier-error-inject.c
oid_registry.c
parser.c
pci_iomap.c
percpu-refcount.c
percpu_counter.c
percpu_ida.c
percpu_test.c
plist.c
pm-notifier-error-inject.c
proportions.c
radix-tree.c
random32.c
ratelimit.c
rational.c
rbtree.c
rbtree_test.c
reciprocal_div.c
rhashtable.c	rhashtable: use cond_resched()	2015-02-27 17:55:14 -05:00
scatterlist.c
seq_buf.c	seq_buf: Fix seq_buf_bprintf() truncation	2015-03-04 23:40:19 -05:00
sha1.c
show_mem.c
smp_processor_id.c
sort.c
stmp_device.c
string.c
string_helpers.c
strncpy_from_user.c
strnlen_user.c
swiotlb.c
syscall.c
test-hexdump.c
test-kstrtox.c
test-string_helpers.c
test_bpf.c
test_firmware.c
test_kasan.c
test_module.c
test_rhashtable.c	rhashtable: remove indirection for grow/shrink decision functions	2015-02-27 16:06:02 -05:00
test_user_copy.c
textsearch.c
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c