-
Notifications
You must be signed in to change notification settings - Fork 112
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Fix out-of-range access to vector. #723
Merged
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Databean
requested review from
jemoreira,
rmuthiah,
jmacnak and
adelva1984
as code owners
September 11, 2024 22:12
ser-io
approved these changes
Sep 11, 2024
The command `cvd --group_name=cvd_1 --instance_name=1` was failing with a segmentation fault. Valgrind reported an invalid memory access. ``` ==2063245== Invalid read of size 8 ==2063245== at 0x4B6ED26: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_assign(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.33) ==2063245== by 0x4B6F20C: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.33) ==2063245== by 0x6FE9FF: cuttlefish::ParseInvocation(cuttlefish::cvd::Request const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x5EEA6B: cuttlefish::AcloudCommand::CanHandle(cuttlefish::RequestWithStdio const&) const (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x5532A7: cuttlefish::RequestHandler(cuttlefish::RequestWithStdio const&, std::vector<std::unique_ptr<cuttlefish::CvdServerHandler, std::default_delete<cuttlefish::CvdServerHandler> >, std::allocator<std::unique_ptr<cuttlefish::CvdServerHandler, std::default_delete<cuttlefish::CvdServerHandler> > > > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x5531CC: cuttlefish::RequestContext::Handler(cuttlefish::RequestWithStdio const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x4932F7: cuttlefish::Cvd::HandleCommand(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x493F0D: cuttlefish::Cvd::HandleCvdCommand(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x46C42C: cuttlefish::(anonymous namespace)::CvdMain(int, char**, char**, android::base::LogSeverity) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x46DD84: main (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== Address 0x6188738 is 8 bytes after a block of size 32 alloc'd ==2063245== at 0x4840F83: operator new(unsigned long) (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so) ==2063245== by 0x485227: std::__new_allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::allocate(unsigned long, void const*) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x48321E: std::_Vector_base<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_allocate(unsigned long) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x4BA980: void std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::_M_realloc_insert<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>(__gnu_cxx::__normal_iterator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x4B6E86: std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::push_back(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x6FE929: cuttlefish::ParseInvocation(cuttlefish::cvd::Request const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x5EEA6B: cuttlefish::AcloudCommand::CanHandle(cuttlefish::RequestWithStdio const&) const (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x5532A7: cuttlefish::RequestHandler(cuttlefish::RequestWithStdio const&, std::vector<std::unique_ptr<cuttlefish::CvdServerHandler, std::default_delete<cuttlefish::CvdServerHandler> >, std::allocator<std::unique_ptr<cuttlefish::CvdServerHandler, std::default_delete<cuttlefish::CvdServerHandler> > > > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x5531CC: cuttlefish::RequestContext::Handler(cuttlefish::RequestWithStdio const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x4932F7: cuttlefish::Cvd::HandleCommand(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x493F0D: cuttlefish::Cvd::HandleCvdCommand(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, std::unordered_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ==2063245== by 0x46C42C: cuttlefish::(anonymous namespace)::CvdMain(int, char**, char**, android::base::LogSeverity) (in /usr/local/google/home/schuffelen/.cache/bazel/_bazel_schuffelen/e5255ea4f0651a267b9880f9e2ad5869/execroot/_main/bazel-out/k8-fastbuild/bin/cuttlefish/cvd) ``` Reproduced by ``` $ bazel build cuttlefish:cvd $ bazel run cuttlefish:cvd -- --group_name=cvd_1 --instance_name=1 $ valgrind bazel-bin/cuttlefish/cvd --group_name=cvd_1 --instance_name=1 ``` The command `cvd --group_name=cvd_1 --instance_name=1` looks like it should have more than 1 member in the argv `std::vector`, but I suspect some intermediate layer is stripping out "selector arguments" before it makes it to this call. Bug: b/366040241 Test: bazel run cuttlefish:cvd -- --group_name=cvd_1 --instance_name=1
Databean
force-pushed
the
fix_segfault
branch
from
September 11, 2024 22:52
3e39999
to
b1512bd
Compare
jmacnak
approved these changes
Sep 12, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The command
cvd --group_name=cvd_1 --instance_name=1
was failing with a segmentation fault. Valgrind reported an invalid memory access.Reproduced by
The command
cvd --group_name=cvd_1 --instance_name=1
looks like it should have more than 1 member in the argvstd::vector
, but I suspect some intermediate layer is stripping out "selector arguments" before it makes it to this call.Bug: b/366040241
Test: bazel run cuttlefish:cvd -- --group_name=cvd_1 --instance_name=1