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2016-05-25Merge branch 'memarea_overflow_027_squashed' into maint-0.2.8Nick Mathewson
2016-05-25Fix a pointer arithmetic bug in memarea_alloc()Nick Mathewson
Fortunately, the arithmetic cannot actually overflow, so long as we *always* check for the size of potentially hostile input before copying it. I think we do, though. We do check each line against MAX_LINE_LENGTH, and each object name or object against MAX_UNPARSED_OBJECT_SIZE, both of which are 128k. So to get this overflow, we need to have our memarea allocated way way too high up in RAM, which most allocators won't actually do. Bugfix on 0.2.1.1-alpha, where memarea was introduced. Found by Guido Vranken.
2016-04-12Merge remote-tracking branch 'public/bug18716_027' into maint-0.2.8Nick Mathewson
2016-04-07memarea: Don't assume that sizeof(ulong) >= sizeof(void*).Nick Mathewson
Fixes bug 18716; bugfix on 0.2.1.1-alpha where memarea.c was introduced. Found by wbenny.
2016-03-26add a little documentation to memarea. (I have been testing a tool.)Nick Mathewson
2016-02-27Update the copyright year.Nick Mathewson
2016-02-24Remove the freelist from memarea.cNick Mathewson
This is in accordance with our usual policy against freelists, now that working allocators are everywhere. It should also make memarea.c's coverage higher. I also doubt that this code ever helped performance.
2015-12-15Replace usage of INLINE with inlinecypherpunks
This patch was generated using; sed -i -e "s/\bINLINE\b/inline/" src/*/*.[ch] src/*/*/*.[ch]
2015-01-02Bump copyright dates to 2015, in case someday this matters.Nick Mathewson
2014-10-28Add another year to our copyright dates.Nick Mathewson
Because in 95 years, we or our successors will surely care about enforcing the BSD license terms on this code. Right?
2014-04-19scan-build: memarea_strndup() undefined behaviorNick Mathewson
The memarea_strndup() function would have hit undefined behavior by creating an 'end' pointer off the end of a string if it had ever been given an 'n' argument bigger than the length of the memory ares that it's scanning. Fortunately, we never did that except in the unit tests. But it's not a safe behavior to leave lying around.
2014-03-18memarea.c: use flexible array member for memNick Mathewson
This make clang's memory sanitizer happier that we aren't reading off the end of a char[1]. We hadn't replaced the char[1] with a char[FLEXIBLE_ARRAY_MEMBER] before because we were doing a union trick to force alignment. Now we use __attribute__(aligned) where available, and we do the union trick elsewhere. Most of this patch is just replacing accesses to (x)->u.mem with (x)->U_MEM, where U_MEM is defined as "u.mem" or "mem" depending on our implementation.
2013-01-16Update the copyright date to 201.Nick Mathewson
2012-10-12Rename all reserved C identifiers we definedNick Mathewson
For everything we declare that starts with _, make it end with _ instead. This is a machine-generated patch. To make it, start by getting the list of reserved identifiers using: git ls-tree -r --name-only HEAD | grep '\.[ch]$' | \ xargs ctags --c-kinds=defglmpstuvx -o - | grep '^_' | \ cut -f 1 | sort| uniq You might need gnu ctags. Then pipe the output through this script: ============================== use strict; BEGIN { print "#!/usr/bin/perl -w -i -p\n\n"; } chomp; next if ( /^__attribute__/ or /^__func__/ or /^_FILE_OFFSET_BITS/ or /^_FORTIFY_SOURCE/ or /^_GNU_SOURCE/ or /^_WIN32/ or /^_DARWIN_UNLIMITED/ or /^_FILE_OFFSET_BITS/ or /^_LARGEFILE64_SOURCE/ or /^_LFS64_LARGEFILE/ or /^__cdecl/ or /^__attribute__/ or /^__func__/ or /^_WIN32_WINNT/); my $ident = $_; my $better = $ident; $better =~ s/^_//; $better = "${better}_"; print "s/(?<![A-Za-z0-9_])$ident(?![A-Za-z0-9_])/$better/g;\n"; ============================== Then run the resulting script on all the files you want to change. (That is, all the C except that in src/ext.) 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2012-08-13Remove tor_malloc_roundup().Nick Mathewson
This function never actually did us any good, and it added a little complexity. See the changes file for more info.
2012-06-04Update copyright dates to 2012; add a few missing copyright statementsNick Mathewson
2011-03-25Comment out ancient asserts for bug 930; resolve an xxx021Nick Mathewson
2011-03-16Doxygen documentation for about 100 things that didn't have anyNick Mathewson
About 860 doxygen-less things remain in 0.2.2
2011-01-03Merge remote branch 'origin/maint-0.2.1' into maint-0.2.2Nick Mathewson
Conflicts: src/common/test.h src/or/test.c
2011-01-03Bump copyright statements to 2011Nick Mathewson
2010-12-15Merge remote branch fix_security_bug_021 into fix_security_bug_022Nick Mathewson
Conflicts: src/common/memarea.c src/or/or.h src/or/rendclient.c
2010-12-13Have all of our allocation functions and a few others check for underflowNick Mathewson
It's all too easy in C to convert an unsigned value to a signed one, which will (on all modern computers) give you a huge signed value. If you have a size_t value of size greater than SSIZE_T_MAX, that is way likelier to be an underflow than it is to be an actual request for more than 2gb of memory in one go. (There's nothing in Tor that should be trying to allocate >2gb chunks.)
2010-07-09Rename log.h to torlog.hNick Mathewson
This should make us conflict less with system files named "log.h". Yes, we shouldn't have been conflicting with those anyway, but some people's compilers act very oddly. The actual change was done with one "git mv", by editing Makefile.am, and running find . -name '*.[ch]' | xargs perl -i -pe 'if (/^#include.*\Wlog.h/) {s/log.h/torlog.h/; }'
2010-02-27Merge remote branch 'origin/maint-0.2.1'Nick Mathewson
Conflicts: src/common/test.h src/or/test.c
2010-02-27Update Tor Project copyright yearsNick Mathewson
2009-12-12*_free functions now accept NULLSebastian Hahn
Some *_free functions threw asserts when passed NULL. Now all of them accept NULL as input and perform no action when called that way. This gains us consistence for our free functions, and allows some code simplifications where an explicit null check is no longer necessary.
2009-05-17Merge commit 'origin/maint-0.2.1'Nick Mathewson
2009-05-17Fix an assertion-failure in memarea_alloc() on 64-bit platforms.Nick Mathewson
The trick is that we should assert that our next_mem pointer has not run off the end of the array _before_ we realign the pointer, since doing that could take us over the end... but only if we're on a system where malloc() gives us ram in increments smaller than sizeof(void*).
2009-05-12Add sentinel values to the end of memarea chunks.Nick Mathewson
This might detect some possible causes of bug 930, and will at least make sure we aren't doing some dumb memory-corruption stuff with the heap and router-parsing.
2009-05-04Update copyright to 2009.Karsten Loesing
2009-05-02Update copyright to 2009.Karsten Loesing
2009-03-21Actually do that memarea_strndup fix right. Not only must you not examine ↵Nick Mathewson
unmapped ram, but you also must not copy it. From lark. svn:r19095
2009-03-21fix from lark: make memarea_strndup() work even at the end of a mmap chunk. ↵Nick Mathewson
Bug was harmless for now, I think. svn:r19094
2009-03-18Add some asserts to try to catch bug 930Nick Mathewson
svn:r19074
2009-01-04Remove svn $Id$s from our source, and remove tor --version --version.Nick Mathewson
The subversion $Id$ fields made every commit force a rebuild of whatever file got committed. They were not actually useful for telling the version of Tor files in the wild. svn:r17867
2008-12-22Make freelist_len in memarea.c static; document a few variables.Nick Mathewson
svn:r17741
2008-12-22Add DOCDOC entries for undocumented static and global variables.Nick Mathewson
svn:r17739
2008-12-22Fix most DOCDOCs remaining and/or added by redox.Nick Mathewson
svn:r17734
2008-12-22Add DOCDOC comments for all undocumented functions. Add missing *s to other ↵Nick Mathewson
comments so that they will get recognized as doxygen. svn:r17729
2008-12-17Resolve many DOCDOCs.Nick Mathewson
svn:r17662
2008-11-05The chunk_size field in memarea_t was never actually set. Remove the whole ↵Nick Mathewson
thing. svn:r17195
2008-04-08 r19249@catbus: nickm | 2008-04-08 14:04:02 -0400Nick Mathewson
Oops. Fix one last memarea freelist bug. svn:r14322
2008-04-08 r19247@catbus: nickm | 2008-04-08 13:50:01 -0400Nick Mathewson
Fix behavior of memarea freelists. svn:r14321
2008-04-08 r19245@catbus: nickm | 2008-04-08 13:33:27 -0400Nick Mathewson
Oops. It turns out that there are some subtle differences between >= and <. svn:r14320
2008-04-08 r19243@catbus: nickm | 2008-04-08 13:28:59 -0400Nick Mathewson
Use a freelist to hold a few recent memarea chunks. We do a kazillion memarea allocs and frees; that cant be good for us. svn:r14319
2008-03-26 r19072@catbus: nickm | 2008-03-26 13:50:24 -0400Nick Mathewson
Add code to debug memory area size. Use results of this code to set a couple of area sizes more sanely. svn:r14201
2008-03-26 r19062@catbus: nickm | 2008-03-26 12:56:25 -0400Nick Mathewson
Fix whitespace svn:r14197
2008-03-26 r19049@catbus: nickm | 2008-03-26 12:33:25 -0400Nick Mathewson
Add new stacklike, free-all-at-once memory allocation strategy. Use it when parsing directory information. This helps parsing speed, and may well help fragmentation some too. hidden-service-related stuff still uses the old tokenizing strategies. svn:r14194
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