[Bug #20161]
The cc->mbuf gets overwritten, so we need to free it to not leak memory.
For example:
str = "hello world".encode(Encoding::UTF_32LE)
10.times do
1_000.times do
str.grapheme_clusters
end
puts `ps -o rss= -p #{$$}`
end
Before:
15536
15760
15920
16144
16304
16480
16640
16784
17008
17280
After:
15584
15584
15760
15824
15888
15888
15888
15888
16048
16112
before this change, creating a regex from a regex with a named capture, Regexp.new(/(?<name>)/), causes memory to be shared between the two named capture groups which can cause a segfault if the original is GCed.
According to the C99 specification section 7.20.3.2 paragraph 2:
> If ptr is a null pointer, no action occurs.
So we do not need to check that the pointer is a null pointer.
A code pattern `p + enclen(enc, p, pend)` may lead to a buffer overrun
if incomplete bytes of a UTF-8 character is placed at the end of a
string. Because this pattern is used in several places in onigmo,
this change fixes the issue in the side of `enclen`: the function should
not return a number that is larger than `pend - p`.
Co-Authored-By: Nobuyoshi Nakada <nobu@ruby-lang.org>
A regexp that ends with an escape following an incomplete UTF-8 char
might cause buffer overrun. Found by OSS-Fuzz.
```
$ valgrind ./miniruby -e 'Regexp.new("\\u2d73\\0\\0\\0\\0 \\\xE6".b)'
==296213== Memcheck, a memory error detector
==296213== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==296213== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==296213== Command: ./miniruby -e Regexp.new("\\\\u2d73\\\\0\\\\0\\\\0\\\\0\ \ \ \ \ \ \ \ \ \ \\\\\\xE6".b)
==296213==
==296213== Warning: client switching stacks? SP change: 0x1ffe8020e0 --> 0x1ffeffff10
==296213== to suppress, use: --max-stackframe=8379952 or greater
==296213== Invalid read of size 1
==296213== at 0x484EA10: memmove (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==296213== by 0x339568: memcpy (string_fortified.h:29)
==296213== by 0x339568: onig_strcpy (regparse.c:271)
==296213== by 0x339568: onig_node_str_cat (regparse.c:1413)
==296213== by 0x33CBA0: parse_exp (regparse.c:6198)
==296213== by 0x33EDE4: parse_branch (regparse.c:6511)
==296213== by 0x33EEA2: parse_subexp (regparse.c:6544)
==296213== by 0x34019C: parse_regexp (regparse.c:6593)
==296213== by 0x34019C: onig_parse_make_tree (regparse.c:6638)
==296213== by 0x32782D: onig_compile_ruby (regcomp.c:5779)
==296213== by 0x313EFA: onig_new_with_source (re.c:876)
==296213== by 0x313EFA: make_regexp (re.c:900)
==296213== by 0x313EFA: rb_reg_initialize (re.c:3136)
==296213== by 0x318555: rb_reg_initialize_str (re.c:3170)
==296213== by 0x318555: rb_reg_init_str (re.c:3205)
==296213== by 0x31A669: rb_reg_initialize_m (re.c:3856)
==296213== by 0x3E5165: vm_call0_cfunc_with_frame (vm_eval.c:150)
==296213== by 0x3E5165: vm_call0_cfunc (vm_eval.c:164)
==296213== by 0x3E5165: vm_call0_body (vm_eval.c:210)
==296213== by 0x3E89BD: vm_call0_cc (vm_eval.c:87)
==296213== by 0x3E89BD: rb_call0 (vm_eval.c:551)
==296213== Address 0x9d45b10 is 0 bytes after a block of size 32 alloc'd
==296213== at 0x4844899: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==296213== by 0x20FA7B: objspace_xmalloc0 (gc.c:12146)
==296213== by 0x35F8C9: str_buf_cat4.part.0 (string.c:3132)
==296213== by 0x31359D: unescape_escaped_nonascii (re.c:2690)
==296213== by 0x313A9D: unescape_nonascii (re.c:2869)
==296213== by 0x313A9D: rb_reg_preprocess (re.c:2992)
==296213== by 0x313DFC: rb_reg_initialize (re.c:3109)
==296213== by 0x318555: rb_reg_initialize_str (re.c:3170)
==296213== by 0x318555: rb_reg_init_str (re.c:3205)
==296213== by 0x31A669: rb_reg_initialize_m (re.c:3856)
==296213== by 0x3E5165: vm_call0_cfunc_with_frame (vm_eval.c:150)
==296213== by 0x3E5165: vm_call0_cfunc (vm_eval.c:164)
==296213== by 0x3E5165: vm_call0_body (vm_eval.c:210)
==296213== by 0x3E89BD: vm_call0_cc (vm_eval.c:87)
==296213== by 0x3E89BD: rb_call0 (vm_eval.c:551)
==296213== by 0x3E957B: rb_call (vm_eval.c:877)
==296213== by 0x3E957B: rb_funcallv_kw (vm_eval.c:1074)
==296213== by 0x2A4123: rb_class_new_instance_pass_kw (object.c:1991)
==296213==
==296213==
==296213== HEAP SUMMARY:
==296213== in use at exit: 35,476,538 bytes in 9,489 blocks
==296213== total heap usage: 14,893 allocs, 5,404 frees, 37,517,821 bytes allocated
==296213==
==296213== LEAK SUMMARY:
==296213== definitely lost: 316,081 bytes in 2,989 blocks
==296213== indirectly lost: 136,808 bytes in 2,361 blocks
==296213== possibly lost: 1,048,624 bytes in 3 blocks
==296213== still reachable: 33,975,025 bytes in 4,136 blocks
==296213== suppressed: 0 bytes in 0 blocks
==296213== Rerun with --leak-check=full to see details of leaked memory
==296213==
==296213== For lists of detected and suppressed errors, rerun with: -s
==296213== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
```
Quantifier reduction when using +?)* and +?)+ should not be done
as it affects which text will be matched.
This removes the need for the RQ_PQ_Q ReduceType, so remove the
enum entry and related switch case.
Test that these are the only two patterns affected by testing all
quantifier reduction tuples for both the captured and uncaptured
cases and making sure the matched text is the same for both.
Fixes [Bug #17341]
After 5e86b005c0, I now think ANYARGS is
dangerous and should be extinct. This commit deletes ANYARGS from
st_foreach. I strongly believe that this commit should have had come
with b0af0592fd, which added extra
parameter to st_foreach callbacks.
* string.c (get_reg_grapheme_cluster): make regexp from properly
encoded sources fro wide-char encodings. [Bug #15965]
* regparse.c (node_extended_grapheme_cluster): suppress false
duplicated range warning for the time being.
In regparse.c, in function node_extended_grapheme_cluster,
we used a raw if() with exit(1) as a cross-check for our
length calculations for the common node array. Convert this
to an assertion and comment it out because it is not needed
for active code.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
In file regparse.c, in function node_extended_grapheme_cluster(),
eliminate code duplication of CRLF and '.' (any character). This
uses the fact that both for Unicode encodings and for non-Unicode
encodings, the first alternative is CRLF, and the last alternative
is '.' (any character). This puts all of the pieces into forward
order (the order of the code follows the order of the syntax
definition).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66267 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
regparse.c: In function node_extended_grapheme_cluster(), use function-global
array node_common and use it for list and alternate construction. This is done
so that in case of error, all nodes that have already been constructed can be
correctly freed in a single for loop. Document the layout structure.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66239 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
In regparse.c:
* Reduce coode duplication by merging the almost identical functions
create_sequence_node and create_alternate_node into a new function
create_node_from_array, adding a parameter that distinguishes between
creating a list and creating an alternative.
* Streamline variable/function naming. Unicode UAX #29 uses 'sequence', but
the regular expression library uses 'list' for the same concept. Keep
'sequence' in the ccmments that are taken from UAX #29, but use 'list'
in variable names.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66234 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* unicode.c: Remove the arrays onigenc_unicode_GCB_ranges_GAZ,
onigenc_unicode_GCB_ranges_E_Base, and onigenc_unicode_GCB_ranges_Emoji,
because they are not needed anymore for Unicode 11.0.0.
* regparse.c: Remove external declarations for above arrays.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66232 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
- common.mk: Change Unicode version to 11.0.0, and Emoji version to 11.0
- test/ruby/enc/test_emoji_breaks.rb: update hard-coded Emoji version
- enc/unicode/11.0.0, enc/unicode/11.0.0/casefold.h, enc/unicode/name2ctype.h:
Add generated files. Files for Unicode 10.0.0 will be removed once we are
sure 11.0.0 works.
- lib/unicode_normalize/tables.rb: Updated table.
- regparse.c: Almost completely reimplement grapheme cluster detection in
function node_extended_grapheme_cluster().
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66213 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Remove unnecessary settings of node_array elements to NULL_NODE.
We can do this because we initialize the whole array to NULL_NODEs
and set everything again to NULL_NODEs when creating a sequence or
alternative node.
Also, fix an index error in the initialization of node_array.
(issue #15343)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66139 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
regparse.c: In function node_extended_grapheme_cluster(), introduce function-global
array node_array and use it for sequence and alternate construction. This is done
so that in case of error, all nodes that have already been constructed can be
correctly freed. (issue #15343)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66135 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Remove code that tries to remove CR and LF from Grapheme_Cluster_Break=Control.
This code is unnecessary because Grapheme_Cluster_Break=Control already excludes
CR and LF.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66116 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Introduce new function create_alternate_node() to create an alternative node
from a list of nodes in one go. Use it once (two more uses expected).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66114 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Four more use of create_sequence_node() in node_extended_grapheme_cluster
(a few more to come).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66070 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
One more use of create_sequence_node() in node_extended_grapheme_cluster
(several more to come).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Introduce a new preprocessor macro R_ERR to visually reduce repetitive code
checking for return values and going to the err: label at the end of the
function node_extended_grapheme_cluster().
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66057 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
There are only four patterns of the last two arguments to quantify_property_node().
By replacing the lower/upper arguments with a single char, we get more expressive
calls, the last argument directly corresponding to the quantifier that we want to
use (except for '2', which means exactly two).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66052 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
In function node_extended_grapheme_cluster(), store and test
return value from create_sequence_node(). Never forget this!
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66045 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Peter Zhu
Hiroya Fujinami
Adam Hess
Adam Hess
Nobuyoshi Nakada
Yusuke Endoh
Kevin Backhouse
Jeremy Evans
卜部昌平
duerst
ko1
svn