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invalid memory address or nil pointer dereference in (*SortedRowContainer).Add #52768

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GaranR opened this issue Apr 19, 2024 · 10 comments · Fixed by #53237
Closed

invalid memory address or nil pointer dereference in (*SortedRowContainer).Add #52768

GaranR opened this issue Apr 19, 2024 · 10 comments · Fixed by #53237
Labels
affects-6.1 affects-6.5 affects-7.1 affects-7.5 affects-8.1 severity/major sig/planner SIG: Planner type/bug This issue is a bug.

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@GaranR
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GaranR commented Apr 19, 2024 •
edited

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

First execute the following valid.sql
valid.txt

Then a crash occurs when executing the error.sql below
error3.txt

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

Expect no crashes

3. What did you see instead (Required)

runtime error: index out of range [0] with length 0
invalid memory address or nil pointer dereference

tidb.log:

[2024/04/17 11:57:26.208 +00:00] [ERROR] [shuffle.go:259] ["shuffle panicked"] [error="runtime error: index out of range [0] with length 0"] [stack="github.com/pingcap/tidb/pkg/executor.recoveryShuffleExec
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:259
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run.func1
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:388
runtime.gopanic
	/usr/local/go/src/runtime/panic.go:914
runtime.goPanicIndex
	/usr/local/go/src/runtime/panic.go:114
github.com/pingcap/tidb/pkg/util/chunk.(*Column).AppendInt64
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/column.go:247
github.com/pingcap/tidb/pkg/util/chunk.(*Chunk).AppendInt64
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/chunk.go:489
github.com/pingcap/tidb/pkg/executor/aggfuncs.(*rank).AppendFinalResult2Chunk
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/aggfuncs/func_rank.go:65
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).produce
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:404
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:155
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:398"]
[2024/04/17 11:57:26.208 +00:00] [ERROR] [shuffle.go:259] ["shuffle panicked"] [error="runtime error: index out of range [0] with length 0"] [stack="github.com/pingcap/tidb/pkg/executor.recoveryShuffleExec
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:259
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run.func1
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:388
runtime.gopanic
	/usr/local/go/src/runtime/panic.go:914
runtime.goPanicIndex
	/usr/local/go/src/runtime/panic.go:114
github.com/pingcap/tidb/pkg/util/chunk.(*Column).AppendInt64
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/column.go:247
github.com/pingcap/tidb/pkg/util/chunk.(*Chunk).AppendInt64
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/chunk.go:489
github.com/pingcap/tidb/pkg/executor/aggfuncs.(*rank).AppendFinalResult2Chunk
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/aggfuncs/func_rank.go:65
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).produce
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:404
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:155
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:398"]
[2024/04/17 11:57:26.208 +00:00] [ERROR] [shuffle.go:259] ["shuffle panicked"] [error="runtime error: invalid memory address or nil pointer dereference"] [stack="github.com/pingcap/tidb/pkg/executor.recoveryShuffleExec
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:259
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run.func1
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:388
runtime.gopanic
	/usr/local/go/src/runtime/panic.go:914
runtime.panicmem
	/usr/local/go/src/runtime/panic.go:261
runtime.sigpanic
	/usr/local/go/src/runtime/signal_unix.go:861
github.com/pingcap/tidb/pkg/util/chunk.(*SortedRowContainer).Add
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/row_container.go:615
github.com/pingcap/tidb/pkg/executor.(*SortExec).fetchRowChunks
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/sort.go:210
github.com/pingcap/tidb/pkg/executor.(*SortExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/sort.go:117
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).fetchChild
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:211
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).getRowsInPartition
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:182
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:127
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:398"]
[2024/04/17 11:57:26.208 +00:00] [ERROR] [shuffle.go:259] ["shuffle panicked"] [error="runtime error: invalid memory address or nil pointer dereference"] [stack="github.com/pingcap/tidb/pkg/executor.recoveryShuffleExec
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:259
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run.func1
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:388
runtime.gopanic
	/usr/local/go/src/runtime/panic.go:914
runtime.panicmem
	/usr/local/go/src/runtime/panic.go:261
runtime.sigpanic
	/usr/local/go/src/runtime/signal_unix.go:861
github.com/pingcap/tidb/pkg/util/chunk.(*SortedRowContainer).Add
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/row_container.go:615
github.com/pingcap/tidb/pkg/executor.(*SortExec).fetchRowChunks
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/sort.go:210
github.com/pingcap/tidb/pkg/executor.(*SortExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/sort.go:117
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).fetchChild
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:211
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).getRowsInPartition
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:182
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:127
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:398"]
[2024/04/17 11:57:26.208 +00:00] [ERROR] [shuffle.go:259] ["shuffle panicked"] [error="runtime error: index out of range [19] with length 0"] [stack="github.com/pingcap/tidb/pkg/executor.recoveryShuffleExec
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:259
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run.func1
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:388
runtime.gopanic
	/usr/local/go/src/runtime/panic.go:914
runtime.goPanicIndex
	/usr/local/go/src/runtime/panic.go:114
github.com/pingcap/tidb/pkg/util/chunk.(*SortedRowContainer).GetSortedRowAndAlwaysAppendToChunk
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/row_container.go:637
github.com/pingcap/tidb/pkg/executor.(*SortExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/sort.go:133
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).fetchChild
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:211
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).getRowsInPartition
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:182
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:127
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:398"]
[2024/04/17 11:57:26.208 +00:00] [WARN] [session.go:2245] ["compile SQL failed"] [conn=408946062] [session_alias=] [error="runtime error: index out of range [0] with length 0"] [SQL="(check error.sql above)"]
[2024/04/17 11:57:26.209 +00:00] [INFO] [conn.go:1124] ["command dispatched failed"] [conn=408946062] [session_alias=] [connInfo="id:408946062, addr:10.0.2.1:49730 status:10, collation:utf8mb4_0900_ai_ci, user:root"] [command=Query] [status="inTxn:0, autocommit:1"] [sql="(check error.sql above)"] [txn_mode=PESSIMISTIC] [timestamp=449145745225285634] [err="runtime error: index out of range [0] with length 0
github.com/pingcap/tidb/pkg/executor.recoveryShuffleExec
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:258
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run.func1
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:388
runtime.gopanic
	/usr/local/go/src/runtime/panic.go:914
runtime.goPanicIndex
	/usr/local/go/src/runtime/panic.go:114
github.com/pingcap/tidb/pkg/util/chunk.(*Column).AppendInt64
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/column.go:247
github.com/pingcap/tidb/pkg/util/chunk.(*Chunk).AppendInt64
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/util/chunk/chunk.go:489
github.com/pingcap/tidb/pkg/executor/aggfuncs.(*rank).AppendFinalResult2Chunk
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/aggfuncs/func_rank.go:65
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).produce
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:404
github.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/pipelined_window.go:155
github.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/internal/exec/executor.go:283
github.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/tidb/pkg/executor/shuffle.go:398
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1650"]

4. What is your TiDB version? (Required)

+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| tidb_version()                                                                                                                                                                                                                                                 |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v7.5.1
Edition: Community
Git Commit Hash: 7d16cc79e81bbf573124df3fd9351c26963f3e70
Git Branch: heads/refs/tags/v7.5.1
UTC Build Time: 2024-02-27 14:28:32
GoVersion: go1.21.6
Race Enabled: false
Check Table Before Drop: false
Store: tikv |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

We are the BASS team from the School of Cyber Science and Technology at Beihang University. Our main focus is on system software security, operating systems, and program analysis research, as well as the development of automated program testing frameworks for detecting software defects. Using our self-developed database vulnerability testing tool, we have identified the above-mentioned vulnerabilities in TiDB that may lead to database crashes.
@GaranR GaranR added the type/bug This issue is a bug. label Apr 19, 2024
@GaranR GaranR changed the title index out of range [0] with length 0 in (*Column).AppendInt64 (*SortedRowContainer).Add (*SortedRowContainer).GetSortedRowAndAlwaysAppendToChunk invalid memory address or nil pointer dereference in (*SortedRowContainer).Add Apr 19, 2024
@yibin87
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yibin87 commented Apr 28, 2024

Reproduced with latest tidb:
Release Version: v8.2.0-alpha-6-g8f138d5113
Edition: Community
Git Commit Hash: 8f138d5
Git Branch: HEAD
UTC Build Time: 2024-04-22 08:00:01
GoVersion: go1.21.6
Race Enabled: false
Check Table Before Drop: false
Store: tikv

@yibin87
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yibin87 commented Apr 28, 2024

/label affect-8.1

@ti-chi-bot ti-chi-bot
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ti-chi-bot bot commented Apr 28, 2024

@yibin87: The label(s) affect-8.1 cannot be applied. These labels are supported: fuzz/sqlancer, challenge-program, compatibility-breaker, first-time-contributor, contribution, good first issue, correctness, duplicate, proposal, security, ok-to-test, needs-ok-to-test, needs-more-info, needs-cherry-pick-release-5.4, needs-cherry-pick-release-6.1, needs-cherry-pick-release-6.5, needs-cherry-pick-release-7.1, needs-cherry-pick-release-7.5, needs-cherry-pick-release-8.1, affects-5.4, affects-6.1, affects-6.5, affects-7.1, affects-7.5, affects-8.1, may-affects-5.4, may-affects-6.1, may-affects-6.5, may-affects-7.1, may-affects-7.5, may-affects-8.1.

In response to this:

/label affect-8.1

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

@yibin87
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yibin87 commented Apr 28, 2024

/label affects-8.1

@yibin87
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yibin87 commented Apr 28, 2024

/label affects-7.5

@yibin87 yibin87 mentioned this issue May 6, 2024
Closed
@xzhangxian1008
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minimal reproduce sql:

select
    ref_15.c_wzmb0 as c0
from
    t_bhze93f as ref_15
where (EXISTS (
    select
        RANK() over win_fru73h9zyn as c8
    from
        t_xf1at0 as ref_16
    window win_fru73h9zyn as (partition by (ref_16.c__icnfdo_ is NULL), ref_16.c_ldqj5xa)));

@xzhangxian1008
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tidb version: 09c8f96

Not an execution bug, but optimizer.

panic stack:

	/DATA/disk3/xzx/go/src/runtime/panic.go:114\ngithub.com/pingcap/tidb/pkg/util/chunk.(*Column).AppendInt64
	/DATA/disk3/xzx/tidb/pkg/util/chunk/column.go:258\ngithub.com/pingcap/tidb/pkg/util/chunk.(*Chunk).AppendInt64
	/DATA/disk3/xzx/tidb/pkg/util/chunk/chunk.go:505\ngithub.com/pingcap/tidb/pkg/executor/aggfuncs.(*rank).AppendFinalResult2Chunk
	/DATA/disk3/xzx/tidb/pkg/executor/aggfuncs/func_rank.go:64\ngithub.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).produce
	/DATA/disk3/xzx/tidb/pkg/executor/pipelined_window.go:403\ngithub.com/pingcap/tidb/pkg/executor.(*PipelinedWindowExec).Next
	/DATA/disk3/xzx/tidb/pkg/executor/pipelined_window.go:154\ngithub.com/pingcap/tidb/pkg/executor/internal/exec.Next
	/DATA/disk3/xzx/tidb/pkg/executor/internal/exec/executor.go:410\ngithub.com/pingcap/tidb/pkg/executor.(*shuffleWorker).run
	/DATA/disk3/xzx/tidb/pkg/executor/shuffle.go:409\nruntime.goexit
	/DATA/disk3/xzx/go/src/runtime/asm_amd64.s:1650

After debug, we can find that the type of column appended by AppendFinalResult2Chunk is a variable length type, but we append it with a fixed length int64 variable which causes panic.

The appended chunk named as chk is actually the resultChk generated by PipelinedWindowExec at pipelined_window.go:L221. e.RetFieldTypes() determines the column attribute of resultChk. Window executor's RetFieldType is set by plannercore.PhysicalWindow.Schema() at builder.go:L4679 when window executor is built and the plannercore.PhysicalWindow is generated at expression_rewriter.go:L1044.

@xzhangxian1008
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/sig planner

@ti-chi-bot ti-chi-bot bot added the sig/planner SIG: Planner label May 11, 2024
@xzhangxian1008
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/remove-sig execution

@ti-chi-bot ti-chi-bot bot removed the sig/execution SIG execution label May 11, 2024
@winoros
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winoros commented May 13, 2024

img_v3_02ar_8959d11b-7399-42f9-b5a7-42b6c76fbc6g
img_v3_02ar_caf1d1de-3c40-4f75-aa83-404dd4f8e0fg
image

The output columns of the top plan are directly passed as the parentUsedCols and then the parentUsedCols is modified during the pruning. So the output columns changed unexpectedly.

@winoros winoros mentioned this issue May 13, 2024
Merged
13 tasks
@winoros winoros removed may-affects-5.4 This bug maybe affects 5.4.x versions. may-affects-6.1 labels May 13, 2024
ti-chi-bot bot pushed a commit that referenced this issue May 16, 2024
@winoros
planner: column pruning should use a shallow copy slice (#53237)
6612270 
close #52768
This was referenced May 16, 2024
Open
Open
Merged
Merged
ti-chi-bot bot pushed a commit that referenced this issue May 16, 2024
@ti-chi-bot
planner: column pruning should use a shallow copy slice (#53237) (#53325
27b6278 
)

close #52768
terry1purcell pushed a commit to terry1purcell/tidb that referenced this issue May 17, 2024
@winoros @terry1purcell
planner: column pruning should use a shallow copy slice (pingcap#53237)
62141ee 
close pingcap#52768
ti-chi-bot bot pushed a commit that referenced this issue May 21, 2024
@ti-chi-bot
planner: column pruning should use a shallow copy slice (#53237) (#53324
c0abfd4 
)

close #52768
RidRisR pushed a commit to RidRisR/tidb that referenced this issue May 23, 2024
@winoros @RidRisR
planner: column pruning should use a shallow copy slice (pingcap#53237)
c246523 
close pingcap#52768
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planner: column pruning should use a shallow copy slice winoros/tidb
5 participants
@jebter @winoros @yibin87 @xzhangxian1008 @GaranR