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slice bounds out of rang

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#22 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
go
Domain
backend

Research direction

Start at msgio.go:235 and inspect how go-msgio v0.0.6 sizes and slices its message buffer. Use the reported panic cases and the go-libp2p-secio/go-yamux call path to investigate reproduction. Done means these inputs no longer cause slice-bounds panics, with regression coverage added where the behavior can be tested.

Written by the indexing model from the issue text.

Description

`panic: runtime error: slice bounds out of range [:826] with capacity 512

goroutine 9921985 [running]:
github.com/libp2p/go-msgio.(*reader).ReadMsg(0xc00c5d44c0, 0x0, 0x0, 0x0, 0x0, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/msgio.go:235 +0x2dc
github.com/libp2p/go-libp2p-secio.(*etmReader).fill(0xc0052e34a0, 0x1de, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/rw.go:132 +0x3f
github.com/libp2p/go-libp2p-secio.(*etmReader).Read(0xc0052e34a0, 0xc00c525cd0, 0xc, 0xc, 0x0, 0x0, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/rw.go:171 +0x2a5
io.ReadAtLeast(0x2a09e810, 0xc003127000, 0xc00c525cd0, 0xc, 0xc, 0xc, 0xc, 0x0, 0x0)
C:/Go/src/io/io.go:310 +0x8e
io.ReadFull(...)
C:/Go/src/io/io.go:329
github.com/libp2p/go-yamux.(*Session).recvLoop(0xc000131ce0, 0x0, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/session.go:526 +0xe1
github.com/libp2p/go-yamux.(*Session).recv(0xc000131ce0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/session.go:505 +0x32
created by github.com/libp2p/go-yamux.newSession
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/session.go:125 +0x380
panic: runtime error: slice bounds out of range [:2158] with capacity 2048

goroutine 4538928 [running]:
github.com/libp2p/go-msgio.(*reader).ReadMsg(0xc00a7aae40, 0x0, 0x0, 0x0, 0x0, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/msgio.go:235 +0x2dc
github.com/libp2p/go-libp2p-secio.(*etmReader).fill(0xc00066e500, 0x65d, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/rw.go:132 +0x3f
github.com/libp2p/go-libp2p-secio.(*etmReader).Read(0xc00066e500, 0xc006460390, 0xc, 0xc, 0x0, 0x0, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/rw.go:171 +0x2a5
io.ReadAtLeast(0x2a4a9c88, 0xc005b4a000, 0xc006460390, 0xc, 0xc, 0xc, 0xc, 0x0, 0x0)
C:/Go/src/io/io.go:310 +0x8e
io.ReadFull(...)
C:/Go/src/io/io.go:329
github.com/libp2p/go-yamux.(*Session).recvLoop(0xc001960e00, 0x0, 0x0)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/session.go:526 +0xe1
github.com/libp2p/go-yamux.(*Session).recv(0xc001960e00)
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/session.go:505 +0x32
created by github.com/libp2p/go-yamux.newSession
D:/goWork/pkg/mod/github.com/libp2p/[email protected]/session.go:125 +0x380
panic: runtime error: slice bounds out of range [:798] with capacity 512

`

the go-msgio version we use is v0.0.6
#16
33cn/chain33/issues/1000

Dominant language
Go
Stars
17
Forks
14
No merged PRs in 30d

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