Launching soon: The world's first vendor agnostic bug scrubLearn more & join waitlist
OPERATIONAL DEFECT DATABASE
...
...
Running the modifier_object_replace unit test under UBSAN gives the following stack trace: src/mongo/db/ops/modifier_object_replace.cpp:53:17: runtime error: reference binding to misaligned address 0x000002e1b7eb for type 'unsigned long long', which requires 8 byte alignment 0x000002e1b7eb: note: pointer points here 00 11 61 00 00 00 00 00 00 00 00 00 10 72 00 01 00 00 00 10 78 00 01 00 00 00 11 62 00 00 00 00 ^ #0 0x6788bb in mongo::(anonymous namespace)::fixupTimestamps(mongo::BSONObj const&) /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/db/ops/modifier_object_replace.cpp:52:33 #1 0x6788bb in mongo::ModifierObjectReplace::init(mongo::BSONElement const&, mongo::ModifierInterface::Options const&, bool*) /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/db/ops/modifier_object_replace.cpp:97 #2 0x5bff8d in (anonymous namespace)::Mod::Mod(mongo::BSONObj) /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/db/ops/modifier_object_replace_test.cpp:68:9 #3 0x5bee7b in (anonymous namespace)::UnitTest__Timestamp__ReplaceAll::_doTest() /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/db/ops/modifier_object_replace_test.cpp:288:9 #4 0x6aeb68 in mongo::unittest::Test::run() /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/unittest/unittest.cpp:147:9 #5 0x5bec4f in void mongo::unittest::Suite::runTestObject() /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/unittest/unittest.h:405:9 #6 0x6b02fd in mongo::unittest::TestHolder::run() const /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/unittest/unittest.h:257:9 #7 0x6b02fd in mongo::unittest::Suite::run(std::string const&, int) /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/unittest/unittest.cpp:263 #8 0x6b17c7 in mongo::unittest::Suite::run(std::vector > const&, std::string const&, int) /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/unittest/unittest.cpp:321:27 #9 0x6b6ee7 in main /home/andrew/Documents/10gen/dev/src/mongodb/src/mongo/unittest/unittest_main.cpp:40:12 #10 0x7f11d9f7ea3f in __libc_start_main /build/buildd/glibc-2.21/csu/libc-start.c:289 #11 0x5a67a8 in _start (/home/andrew/Documents/10gen/dev/src/mongodb/build/optdebug/mongo/db/ops/modifier_object_replace_test+0x5a67a8) The offending code is this block: https://github.com/mongodb/mongo/blob/95ca58f7396c1c4e1c5e54caa81dda875ca87b57/src/mongo/db/ops/modifier_object_replace.cpp#L44-L60 The code should be re-written in terms of the DataCursor/DataView primitives.
xgen-internal-githook commented on Thu, 17 Mar 2016 15:23:27 +0000: Author: {u'username': u'samantharitter', u'name': u'samantharitter', u'email': u'samantha.ritter@10gen.com'} Message: SERVER-22701 Make replace modifier timestamp handling endian-safe Branch: master https://github.com/mongodb/mongo/commit/31701cb45e15c8c6cd7f89232c04893aad7565fe
Run modifier_object_replace_test under UBSAN