fatal error: sync: unlock of unlocked mutex

[tiancaiamao]

Bug Report

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1. Minimal reproduce step (Required)

2. What did you expect to see? (Required)

3. What did you see instead (Required)

fatal error: sync: unlock of unlocked mutex

goroutine 7349387639 [running]:
sync.fatal({0x5a4e38e?, 0x30?})
	/usr/local/go/src/runtime/panic.go:1061 +0x18
sync.(*Mutex).unlockSlow(0xc09de4f2d0, 0xffffffff)
	/usr/local/go/src/sync/mutex.go:229 +0x35
sync.(*Mutex).Unlock(0x0?)
	/usr/local/go/src/sync/mutex.go:223 +0x25
github.com/pingcap/tidb/pkg/sessionctx/variable.(*SessionVars).GetRelatedTableForMDL(0xc15716a000)
	/workspace/source/tidb/pkg/sessionctx/variable/session.go:3558 +0x106
github.com/pingcap/tidb/pkg/session.(*session).TxnInfo(0xc05925d180)
	/workspace/source/tidb/pkg/session/session.go:528 +0x209
github.com/pingcap/tidb/pkg/server.(*Server).ShowTxnList(0xc002603100)
	/workspace/source/tidb/pkg/server/server.go:849 +0x1a8
github.com/pingcap/tidb/pkg/executor.(*tidbTrxTableRetriever).retrieve(0xc09e604d20, {0x63a0500?, 0xc06dc9a570}, {0x6419780?, 0xc098691680})
	/workspace/source/tidb/pkg/executor/infoschema_reader.go:2492 +0xee
github.com/pingcap/tidb/pkg/executor.(*MemTableReaderExec).Next(0xc09e6106e0, {0x63a0500, 0xc06dc9a570}, 0xc0a2d0fc20)
	/workspace/source/tidb/pkg/executor/memtable_reader.go:119 +0x2a6
github.com/pingcap/tidb/pkg/executor/internal/exec.Next({0x63a0500, 0xc06dc9a570}, {0x63b5a40, 0xc09e6106e0}, 0xc0a2d0fc20)
	/workspace/source/tidb/pkg/executor/internal/exec/executor.go:283 +0x2fa
github.com/pingcap/tidb/pkg/executor.(*SelectionExec).Next(0xc09e6140e0, {0x63a0500, 0xc06dc9a570}, 0xc0a2d0fc70)
	/workspace/source/tidb/pkg/executor/executor.go:1598 +0xde
github.com/pingcap/tidb/pkg/executor/internal/exec.Next({0x63a0500, 0xc06dc9a570}, {0x63b6d80, 0xc09e6140e0}, 0xc0a2d0fc70)
	/workspace/source/tidb/pkg/executor/internal/exec/executor.go:283 +0x2fa
github.com/pingcap/tidb/pkg/executor.(*CoprocessorDAGHandler).HandleRequest(0xc09e65d8f0, {0x63a0500?, 0xc06dc9a150?}, 0xc000f75900?)
	/workspace/source/tidb/pkg/executor/coprocessor.go:90 +0x2b7
github.com/pingcap/tidb/pkg/server.(*rpcServer).handleCopRequest(0x1c19d5a?, {0x63a0500, 0xc06dc9a150}, 0x0?)
	/workspace/source/tidb/pkg/server/rpc_server.go:214 +0x216
github.com/pingcap/tidb/pkg/server.(*rpcServer).Coprocessor(0x589fa20?, {0x63a0500, 0xc06dc9a150}, 0x0?)
	/workspace/source/tidb/pkg/server/rpc_server.go:103 +0xa5
github.com/pingcap/kvproto/pkg/tikvpb._Tikv_Coprocessor_Handler({0x59b3e80?, 0xc01413f0e0}, {0x63a0500, 0xc06dc9a150}, 0xc1b33c4c00, 0x0)
	/root/go/pkg/mod/github.com/pingcap/[email protected]/pkg/tikvpb/tikvpb.pb.go:3512 +0x169
google.golang.org/grpc.(*Server).processUnaryRPC(0xc013fde780, {0x63a0500, 0xc06dc9a090}, {0x63bf7e0, 0xc00f1bd1e0}, 0xc09dcec7e0, 0xc01413f200, 0x8b6c0b0, 0x0)
	/root/go/pkg/mod/google.golang.org/[email protected]/server.go:1343 +0xe03
google.golang.org/grpc.(*Server).handleStream(0xc013fde780, {0x63bf7e0, 0xc00f1bd1e0}, 0xc09dcec7e0)
	/root/go/pkg/mod/google.golang.org/[email protected]/server.go:1737 +0xc4c
google.golang.org/grpc.(*Server).serveStreams.func1.1()
	/root/go/pkg/mod/google.golang.org/[email protected]/server.go:986 +0x86
created by google.golang.org/grpc.(*Server).serveStreams.func1 in goroutine 52285
	/root/go/pkg/mod/google.golang.org/[email protected]/server.go:997 +0x145

4. What is your TiDB version? (Required)

v7.5.3