Crash in http go application

ManojKumarChauhan · January 30, 2021, 11:50am

Dev Machine: go version 1.15. Created a http application with linkshared option
go build -linkshared hpptapp.go

Copied the app (hpptapp) with its dependent libraries (go-runtime) and run on another machine where Golang is not installed. Launch the app & hit the browser(localhost:1328/main) multiple times, it worked as expected. Again hit the browser after few seconds the app crashed. The crash can be reproduce everytime. After launching the application, wait for few seconds.

It is getting crashed in ‘client.Do’ function. I also followed the below link but no success

code for httpapp.go:

package main
import (
"github.com/labstack/echo"
"net/http"
)

func mainAdmin(c echo.Context) error {
    client := &http.Client{}
    req, err := http.NewRequest("GET", "https://www.geeksforgeeks.org/find-triplets-array-whose-sum-equal-zero", nil)

    if err == nil {
       resp,err2 := client.Do(req)
       if err2 == nil {
           defer resp.Body.Close()
       }
    }        
    return c.String(http.StatusOK, "Hello, Main!")
}

func main() {
    e := echo.New()
    e.GET("/main", mainAdmin)
    e.Start(":1328")
}

I am getting following stack trace

unexpected fault address 0x154ce0
fatal error: fault
[signal SIGSEGV: segmentation violation code=0x1 addr=0x154ce0 pc=0x154ce0]

goroutine 31 [running]:
runtime.throw(0x7f03b0b95f77, 0x5)
/usr/local/go/src/runtime/panic.go:1116 +0x74 fp=0xc0000ce518 sp=0xc0000ce4e8 pc=0x7f03b0b4b494
runtime.sigpanic()
/usr/local/go/src/runtime/signal_unix.go:727 +0x428 fp=0xc0000ce548 sp=0xc0000ce518 pc=0x7f03b0b68a88
crypto/sha512.blockAMD64(0xc0000ce778, 0xc0000ce7b8, 0x80, 0x80)
/usr/local/go/src/crypto/sha512/sha512block_amd64.s:144 +0x3f15 fp=0xc0000ce550 sp=0xc0000ce548 pc=0x654315
crypto/sha512.block(0xc0000ce778, 0xc0000ce7b8, 0x80, 0x80)
/usr/local/go/src/crypto/sha512/sha512block_amd64.go:23 +0x8e fp=0xc0000ce580 sp=0xc0000ce550 pc=0x6503ae
crypto/sha512.(*digest).Write(0xc0000ce778, 0xc0000ce650, 0x10, 0x80, 0x62, 0x0, 0x0)
/usr/local/go/src/crypto/sha512/sha512.go:262 +0x1df fp=0xc0000ce5d0 sp=0xc0000ce580 pc=0x64fa5f
crypto/sha512.(*digest).checkSum(0xc0000ce778, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
/usr/local/go/src/crypto/sha512/sha512.go:310 +0x125 fp=0xc0000ce6e0 sp=0xc0000ce5d0 pc=0x650085
crypto/sha512.(*digest).Sum(0xc000542d20, 0x0, 0x0, 0x0, 0x1, 0x1, 0x0)
/usr/local/go/src/crypto/sha512/sha512.go:282 +0xa5 fp=0xc0000ce868 sp=0xc0000ce6e0 pc=0x64fba5
crypto/hmac.(*hmac).Sum(0xc000541c80, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0)
/usr/local/go/src/crypto/hmac/hmac.go:57 +0x58 fp=0xc0000ce8b8 sp=0xc0000ce868 pc=0x6814b8
golang.org/x/crypto/hkdf.(*hkdf).Read(0xc00050caf0, 0xc00052f340, 0x20, 0x20, 0xc0000a2770, 0xd, 0x10)
/usr/local/go/src/golang.org/x/crypto/hkdf/hkdf.go:63 +0x1d3 fp=0xc0000ce918 sp=0xc0000ce8b8 pc=0x71fb53
crypto/tls.(*cipherSuiteTLS13).expandLabel(0xd32fe0, 0xc00025c240, 0x30, 0x30, 0x88a498, 0x3, 0x0, 0x0, 0x0, 0x20, …)
/usr/local/go/src/crypto/tls/key_schedule.go:46 +0x2a2 fp=0xc0000cea30 sp=0xc0000ce918 pc=0x754b02
crypto/tls.(*cipherSuiteTLS13).trafficKey(0xd32fe0, 0xc00025c240, 0x30, 0x30, 0x30, 0x30, 0x30, 0xc00025c240, 0x30, 0x30)
/usr/local/go/src/crypto/tls/key_schedule.go:77 +0x98 fp=0xc0000ceac0 sp=0xc0000cea30 pc=0x755218
crypto/tls.(*halfConn).setTrafficSecret(0xc0000fe1f0, 0xd32fe0, 0xc00025c240, 0x30, 0x30)
/usr/local/go/src/crypto/tls/conn.go:215 +0x7a fp=0xc0000ceb20 sp=0xc0000ceac0 pc=0x7281da
crypto/tls.(*clientHandshakeStateTLS13).establishHandshakeKeys(0xc0000cedf0, 0x0, 0x0)
/usr/local/go/src/crypto/tls/handshake_client_tls13.go:360 +0x226 fp=0xc0000cec00 sp=0xc0000ceb20 pc=0x73b046
crypto/tls.(*clientHandshakeStateTLS13).handshake(0xc0000cedf0, 0xc0000a2668, 0x4)
/usr/local/go/src/crypto/tls/handshake_client_tls13.go:79 +0x1bb fp=0xc0000cec50 sp=0xc0000cec00 pc=0x73943b
crypto/tls.(*Conn).clientHandshake(0xc0000fe000, 0x0, 0x0)
/usr/local/go/src/crypto/tls/handshake_client.go:209 +0x65d fp=0xc0000ceee0 sp=0xc0000cec50 pc=0x732f5d
crypto/tls.(*Conn).clientHandshake-fm(0x0, 0x0)
/usr/local/go/src/crypto/tls/handshake_client.go:136 +0x2c fp=0xc0000cef08 sp=0xc0000ceee0 pc=0x76e98c
crypto/tls.(*Conn).Handshake(0xc0000fe000, 0x0, 0x0)
/usr/local/go/src/crypto/tls/conn.go:1362 +0xc9 fp=0xc0000cef78 sp=0xc0000cef08 pc=0x731049
net/http.(*persistConn).addTLS.func2(0x0, 0xc0000fe000, 0xc00051f8b0, 0xc000540ea0)
/usr/local/go/src/net/http/transport.go:1509 +0x45 fp=0xc0000cefc0 sp=0xc0000cef78 pc=0x819545
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:1374 +0x1 fp=0xc0000cefc8 sp=0xc0000cefc0 pc=0x7f03b0b8cfc1
created by net/http.(*persistConn).addTLS
/usr/local/go/src/net/http/transport.go:1505 +0x17d

goroutine 1 [IO wait]:
internal/poll.runtime_pollWait(0x7f03b0f0df48, 0x72, 0x0)
/usr/local/go/src/runtime/netpoll.go:220 +0x65
internal/poll.(*pollDesc).wait(0xc00014c318, 0x72, 0x0, 0x0, 0x88b2eb)
/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x47
internal/poll.(*pollDesc).waitRead(…)
/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Accept(0xc00014c300, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
/usr/local/go/src/internal/poll/fd_unix.go:394 +0x1fc
net.(*netFD).accept(0xc00014c300, 0x1, 0x203000, 0x203000)
/usr/local/go/src/net/fd_unix.go:172 +0x45
net.(*TCPListener).accept(0xc00000e680, 0x29e8d60800, 0x8dffb4, 0xc0000d1d58)
/usr/local/go/src/net/tcpsock_posix.go:139 +0x34
net.(*TCPListener).AcceptTCP(0xc00000e680, 0xca1d52c7009746b2, 0x0, 0x0)
/usr/local/go/src/net/tcpsock.go:248 +0x67
github.com/labstack/echo.tcpKeepAliveListener.Accept(0xc00000e680, 0xc0000d1d58, 0x5ad9c8, 0x601400dd, 0x7f03b0b58970)
/root/go/src/github.com/labstack/echo/echo.go:946 +0x31
net/http.(*Server).Serve(0xc00014e000, 0xba22c0, 0xc00003ec98, 0x0, 0x0)
/usr/local/go/src/net/http/server.go:2937 +0x286
github.com/labstack/echo.(*Echo).serve(0xc000150000, 0xc00014e000, 0x0)
/root/go/src/github.com/labstack/echo/echo.go:789 +0x9b
github.com/labstack/echo.(*Echo).Start(0xc000150000, 0x88a92b, 0x5, 0xb92858, 0x0)
/root/go/src/github.com/labstack/echo/echo.go:663 +0xd7
main.main()
/root/go/src/http2.go:66 +0x10f

goroutine 23 [IO wait]:
internal/poll.runtime_pollWait(0x7f03b0f0dca8, 0x72, 0xb9d200)
/usr/local/go/src/runtime/netpoll.go:220 +0x65
internal/poll.(*pollDesc).wait(0xc000520a18, 0x72, 0xc000539100, 0x1, 0x1)
/usr/local/go/src/internal/poll/fd_poll_runtime.go:87 +0x47
internal/poll.(*pollDesc).waitRead(…)
/usr/local/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Read(0xc000520a00, 0xc000539151, 0x1, 0x1, 0x0, 0x0, 0x0)
/usr/local/go/src/internal/poll/fd_unix.go:159 +0x1b1
net.(*netFD).Read(0xc000520a00, 0xc000539151, 0x1, 0x1, 0x0, 0x0, 0x0)
/usr/local/go/src/net/fd_posix.go:55 +0x51
net.(*conn).Read(0xc00003e050, 0xc000539151, 0x1, 0x1, 0x0, 0x0, 0x0)
/usr/local/go/src/net/net.go:182 +0x90
net/http.(*connReader).backgroundRead(0xc000539140)
/usr/local/go/src/net/http/server.go:690 +0x5a
created by net/http.(*connReader).startBackgroundRead
/usr/local/go/src/net/http/server.go:686 +0xd5

goroutine 25 [chan receive]:
net/http.(*persistConn).addTLS(0xc00053c480, 0xc00052ef40, 0x15, 0x0, 0xc00052ef56, 0x3)
/usr/local/go/src/net/http/transport.go:1515 +0x1a6
net/http.(*Transport).dialConn(0xd38ee0, 0xba3300, 0xc0000a20a8, 0x0, 0x89ad45, 0x5, 0xc00052ef40, 0x19, 0x0, 0xc00053c480, …)
/usr/local/go/src/net/http/transport.go:1585 +0x1d67
net/http.(*Transport).dialConnFor(0xd38ee0, 0xc0001c4160)
/usr/local/go/src/net/http/transport.go:1421 +0xc8
created by net/http.(*Transport).queueForDial
/usr/local/go/src/net/http/transport.go:1390 +0x42f

goroutine 22 [select]:
net/http.(*Transport).getConn(0xd38ee0, 0xc000361400, 0x0, 0x89ad45, 0x5, 0xc00052ef40, 0x19, 0x0, 0x0, 0x0, …)
/usr/local/go/src/net/http/transport.go:1347 +0x5a9
net/http.(*Transport).roundTrip(0xd38ee0, 0xc000172900, 0x30, 0xc000539290, 0x7f03877f32f8)
/usr/local/go/src/net/http/transport.go:569 +0x78e
net/http.(*Transport).RoundTrip(0xd38ee0, 0xc000172900, 0xd38ee0, 0x0, 0x0)
/usr/local/go/src/net/http/roundtrip.go:17 +0x37
net/http.send(0xc000172900, 0xb9c2a0, 0xd38ee0, 0x0, 0x0, 0x0, 0xc00003e060, 0x8e0104, 0x1, 0x0)
/usr/local/go/src/net/http/client.go:252 +0x45a
net/http.(*Client).send(0xc000539230, 0xc000172900, 0x0, 0x0, 0x0, 0xc00003e060, 0x0, 0x1, 0xc0000ce850)
/usr/local/go/src/net/http/client.go:176 +0xff
net/http.(*Client).do(0xc000539230, 0xc000172900, 0x0, 0x0, 0x0)
/usr/local/go/src/net/http/client.go:718 +0x46f
net/http.(*Client).Do(0xc000539230, 0xc000172900, 0x89ad45, 0x46, 0x0)
/usr/local/go/src/net/http/client.go:586 +0x37
main.mainAdmin(0xba7380, 0xc00011cf00, 0x0, 0x0)
/root/go/src/http2.go:35 +0x1f7
github.com/labstack/echo.(*Echo).add.func1(0xba7380, 0xc00011cf00, 0x0, 0x0)
/root/go/src/github.com/labstack/echo/echo.go:536 +0x64
github.com/labstack/echo.(*Echo).ServeHTTP(0xc000150000, 0xba2980, 0xc00014e2a0, 0xc000172800)
/root/go/src/github.com/labstack/echo/echo.go:646 +0x187
net/http.serverHandler.ServeHTTP(0xc00014e000, 0xba2980, 0xc00014e2a0, 0xc000172800)
/usr/local/go/src/net/http/server.go:2843 +0xa5
net/http.(*conn).serve(0xc000423ea0, 0xba32c0, 0xc000361340)
/usr/local/go/src/net/http/server.go:1925 +0x8b1
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:2969 +0x394

skillian · January 30, 2021, 1:40pm

Does the computer that compiled the code support AVX2?

ManojKumarChauhan · February 1, 2021, 4:12am

Yes it’s supported by both computers.
grep avx2 /proc/cpuinfo displays it under flags.

ManojKumarChauhan · February 4, 2021, 7:16am

Hi @skillian,
This issue can be reproduce easily.
Can you give me link for any go application which is using http client. If it works then it can help to solve the issue.

system · May 5, 2021, 7:17am

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