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2021-04-14Merge release-20210408.0-32-g108410638 (automated)gVisor bot
2021-04-14Use assembly stub to take the address of assembly functionsMichael Pratt
Go 1.17 is adding a new register-based calling convention [1] ("ABIInternal"), which used is when calling between Go functions. Assembly functions are still written using the old ABI ("ABI0"). That is, they still accept arguments on the stack, and pass arguments to other functions on the stack. The call rules look approximately like this: 1. Direct call from Go function to Go function: compiler emits direct ABIInternal call. 2. Indirect call from Go function to Go function: compiler emits indirect ABIInternal call. 3. Direct call from Go function to assembly function: compiler emits direct ABI0 call. 4. Indirect call from Go function to assembly function: compiler emits indirect ABIInternal call to ABI conversion wrapper function. 5. Direct or indirect call from assembly function to assembly function: assembly/linker emits call to original ABI0 function. 6. Direct or indirect call from assembly function to Go function: assembly/linker emits ABI0 call to ABI conversion wrapper function. Case 4 is the interesting one here. Since the compiler can't know the ABI of an indirect call, all indirect calls are made with ABIInternal. In order to support indirect ABI0 assembly function calls, a wrapper is generated that translates ABIInternal arguments to ABI0 arguments, calls the target function, and then converts results back. When the address of an ABI0 function is taken from Go code, it evaluates to the address of this wrapper function rather than the target function so that later indirect calls will work as expected. This is normally fine, but gVisor does more than just call some of the assembly functions we take the address of: either noting the start and end address for future reference from a signal handler (safecopy), or copying the function text to a new mapping (platforms). Both of these fail with wrappers enabled (currently, this is Go tip with GOEXPERIMENT=regabiwrappers) because these operations end up operating on the wrapper instead of the target function. We work around this issue by taking advantage of case 5: references to assembly symbols from other assembly functions resolve directly to the desired target symbol. Thus, rather than using reflect to get the address of a Go reference to the functions, we create assembly stubs that return the address of the function. This approach works just as well on current versions of Go, so the change can be made immediately and doesn't require any build tags. [1] https://go.googlesource.com/go/+/refs/heads/master/src/cmd/compile/abi-internal.md PiperOrigin-RevId: 368505655
2021-04-14Merge release-20210408.0-30-g5c1052b6b (automated)gVisor bot
2021-04-14[syserror] Remove syserror from go_marshalZach Koopmans
PiperOrigin-RevId: 368470656
2021-04-12Merge release-20210408.0-24-gc4c6a71fb (automated)gVisor bot
2021-04-12Add DecRef for verity FDs that were missingChong Cai
Some FileDescriptions in verity fs were opened but DecRef() were missing after used. This could result in a ref leak. PiperOrigin-RevId: 368096759
2021-04-12Merge release-20210408.0-23-gf4f6ce337 (automated)gVisor bot
2021-04-12Don't grab TaskSet mu recursively when reading task state.Rahat Mahmood
Reported-by: syzbot+a6ef0f95a2c9e7da26f3@syzkaller.appspotmail.com Reported-by: syzbot+2eaf8a9f115edec468fe@syzkaller.appspotmail.com PiperOrigin-RevId: 368093861
2021-04-10Merge release-20210408.0-17-gd1edabdca (automated)gVisor bot
2021-04-09iptables: support postrouting hook and SNAT targetToshi Kikuchi
The current SNAT implementation has several limitations: - SNAT source port has to be specified. It is not optional. - SNAT source port range is not supported. - SNAT for UDP is a one-way translation. No response packets are handled (because conntrack doesn't support UDP currently). - SNAT and REDIRECT can't work on the same connection. Fixes #5489 PiperOrigin-RevId: 367750325
2021-04-10Merge release-20210408.0-16-gea7faa505 (automated)gVisor bot
2021-04-09Return integrity failure only if enabledChong Cai
If the parent is not enabled in verity stepLocked(), failure to find the child dentry could just mean an incorrect path. PiperOrigin-RevId: 367733412
2021-04-10Merge release-20210408.0-15-g7420821a7 (automated)gVisor bot
2021-04-09Merge pull request #5767 from avagin:mxcsrgVisor bot
PiperOrigin-RevId: 367730917
2021-04-09Merge release-20210408.0-13-gdc8f6c691 (automated)gVisor bot
2021-04-09Move maxListenBacklog check to sentryMithun Iyer
Move maxListenBacklog check to the caller of endpoint Listen so that it is applicable to Unix domain sockets as well. This was changed in cl/366935921. Reported-by: syzbot+a35ae7cdfdde0c41cf7a@syzkaller.appspotmail.com PiperOrigin-RevId: 367728052
2021-04-09Merge release-20210408.0-9-gedf30a9bc (automated)gVisor bot
2021-04-08Set root dentry and hash for verity before verifyChong Cai
Set root dentry and root hash in verity fs before we verify the root directory if a root hash is provided. These are used during verification. PiperOrigin-RevId: 367547346
2021-04-09Merge release-20210408.0-8-g496a3654e (automated)gVisor bot
2021-04-08Set parent after child is verifiedChong Cai
We should only set parent after child is verified. Also, if the parent is set before verified, destroyLocked() will try to grab parent.dirMu, which may cause deadlock. PiperOrigin-RevId: 367543655
2021-04-08Merge release-20210322.0-63-gae019e39b (automated)gVisor bot
2021-04-08Merge pull request #5736 from lubinszARM:pr_bblu_tlb_asidgVisor bot
PiperOrigin-RevId: 367523491
2021-04-06Merge release-20210322.0-52-gfb4c700d0 (automated)gVisor bot
2021-04-05Update gofer dentry permissions only when needed.Ayush Ranjan
Without this change, we ask the gofer server to update the permissions whenever the UID, GID or size is updated via SetStat. Consequently, we don not generate inotify events when the permissions actually change due to SGID bit getting cleared. With this change, we will update the permissions only when needed and generate inotify events. PiperOrigin-RevId: 366946842
2021-04-06Merge release-20210322.0-51-g56c69fb0e (automated)gVisor bot
2021-04-05Fix listen backlog handling to be in parity with LinuxMithun Iyer
- Change the accept queue full condition for a listening endpoint to only honor completed (and delivered) connections. - Use syncookies if the number of incomplete connections is beyond listen backlog. This also cleans up the SynThreshold option code as that is no longer used with this change. - Added a new stack option to unconditionally generate syncookies. Similar to sysctl -w net.ipv4.tcp_syncookies=2 on Linux. - Enable keeping of incomplete connections beyond listen backlog. - Drop incoming SYNs only if the accept queue is filled up. - Drop incoming ACKs that complete handshakes when accept queue is full - Enable the stack to accept one more connection than programmed by listen backlog. - Handle backlog argument being zero, negative for listen, as Linux. - Add syscall and packetimpact tests to reflect the changes above. - Remove TCPConnectBacklog test which is polling for completed connections on the client side which is not reflective of whether the accept queue is filled up by the test. The modified syscall test in this CL addresses testing of connecting sockets. Fixes #3153 PiperOrigin-RevId: 366935921
2021-04-06Merge release-20210322.0-50-g7a7fcf2db (automated)gVisor bot
2021-04-05Report task CPU usage through the cpuacct cgroup controller.Rahat Mahmood
PiperOrigin-RevId: 366923274
2021-04-05Merge release-20210322.0-46-g88f198c2a (automated)gVisor bot
2021-04-05Allow default control values to be set for cgroupfs.Rahat Mahmood
PiperOrigin-RevId: 366891806
2021-04-05Merge release-20210322.0-43-ge21a71bff (automated)gVisor bot
2021-04-05Allow user mount for verity fsChong Cai
Allow user mounting a verity fs on an existing mount by specifying mount flags root_hash and lower_path. PiperOrigin-RevId: 366843846
2021-04-03Merge release-20210322.0-38-g932c8abd0 (automated)gVisor bot
2021-04-02Implement cgroupfs.Rahat Mahmood
A skeleton implementation of cgroupfs. It supports trivial cpu and memory controllers with no support for hierarchies. PiperOrigin-RevId: 366561126
2021-04-03Merge release-20210322.0-36-g491b106d6 (automated)gVisor bot
2021-04-02Merge release-20210322.0-34-gcc762235c (automated)gVisor bot
2021-04-02Internal change.gVisor bot
PiperOrigin-RevId: 366462448
2021-04-01platform/kvm/x86: restore mxcsr when switching from guest to sentryAndrei Vagin
Goruntime sets mxcsr once and never changes it. Reported-by: syzbot+ec55cea6e57ec083b7a6@syzkaller.appspotmail.com Fixes: #5754
2021-03-29Merge release-20210322.0-29-g8a2f7e716 (automated)gVisor bot
2021-03-29[syserror] Split usermem packageZach Koopmans
Split usermem package to help remove syserror dependency in go_marshal. New hostarch package contains code not dependent on syserror. PiperOrigin-RevId: 365651233
2021-03-29Merge release-20210322.0-28-gb125afba4 (automated)gVisor bot
2021-03-29Merge pull request #5728 from zhlhahaha:2091gVisor bot
PiperOrigin-RevId: 365613394
2021-03-29[perf] Reduce contention in ptrace.threadPool.lookupOrCreate().Ayush Ranjan
lookupOrCreate is called from subprocess.switchToApp() and subprocess.syscall(). lookupOrCreate() looks for a thread already created for the current TID. If a thread exists (common case), it returns immediately. Otherwise it creates a new one. This change switches to using a sync.RWMutex. The initial thread existence lookup is now done only with the read lock. So multiple successful lookups can occur concurrently. Only when a new thread is created will it acquire the lock for writing and update the map (which is not the common case). Discovered in mutex profiles from the various ptrace benchmarks. Example: https://gvisor.dev/profile/gvisor-buildkite/fd14bfad-b30f-44dc-859b-80ebac50beb4/843827db-da50-4dc9-a2ea-ecf734dde2d5/tmp/profile/ptrace/BenchmarkFio/operation.write/blockSize.4K/filesystem.tmpfs/benchmarks/fio/mutex.pprof/flamegraph PiperOrigin-RevId: 365612094
2021-03-26arm64 ring0: don't use inner-sharable to invalidate tlbRobin Luk
It is enough to invalidate the tlb of local vcpu in switch(). TLBI with inner-sharable will invalidate the tlb in other vcpu. Arm64 hardware supports at least 256 pcid, so I think it's ok to set the length of pcid pool to 128. Signed-off-by: Robin Luk <lubin.lu@antgroup.com>
2021-03-26Merge release-20210315.0-28-gfbec65fc3 (automated)gVisor bot
2021-03-25Use seqfile.SeqHandles correctly in VFS1 /proc/net/.Jamie Liu
Before this change: ``` $ docker run --runtime=runsc --rm -it -v ~/tmp:/hosttmp ubuntu:focal /hosttmp/issue5732 --bytes1=128 --bytes2=1024 #1: read(128) = 128 #2: read(1024) = EOF $ docker run --runtime=runsc-vfs2 --rm -it -v ~/tmp:/hosttmp ubuntu:focal /hosttmp/issue5732 --bytes1=128 --bytes2=1024 #1: read(128) = 128 #2: read(1024) = 256 ``` After this change: ``` $ docker run --runtime=runsc --rm -it -v ~/tmp:/hosttmp ubuntu:focal /hosttmp/issue5732 --bytes1=128 --bytes2=1024 #1: read(128) = 128 #2: read(1024) = 256 $ docker run --runtime=runsc-vfs2 --rm -it -v ~/tmp:/hosttmp ubuntu:focal /hosttmp/issue5732 --bytes1=128 --bytes2=1024 #1: read(128) = 128 #2: read(1024) = 256 ``` Fixes #5732 PiperOrigin-RevId: 365178386
2021-03-25Merge release-20210315.0-27-g79bc446fa (automated)gVisor bot
2021-03-25Lock TaskSet mutex for writing in ptraceClone().Jamie Liu
This is necessary since ptraceClone() mutates tracer.ptraceTracees. PiperOrigin-RevId: 365152396
2021-03-25Fix comments errorHoward Zhang
Signed-off-by: Howard Zhang <howard.zhang@arm.com>
2021-03-25Fix nogo test errorHoward Zhang
Signed-off-by: Howard Zhang <howard.zhang@arm.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 16:48:29 +0000