core stop randomly

[megasoheilsh]

Integrity requirements

• I have read all the comments in the issue template and ensured that this issue meet the requirements.
• I confirm that I have read the documentation, understand the meaning of all the configuration items I wrote, and did not pile up seemingly useful options or default values.
• I provided the complete config and logs, rather than just providing the truncated parts based on my own judgment.
• I searched issues and did not find any similar issues.
• The problem can be successfully reproduced in the latest Release

Description

core stop randomly

Reproduction Method

xhttp

Client config

none

Server config

{
"inbounds": [
{
"listen": null,
"port": 65300,
"protocol": "vless",
"settings": {
"clients": [
],
"decryption": "none",
"encryption": "none"
},
"sniffing": {
"destOverride": [
"quic",
"fakedns",
"tls"
],
"enabled": true,
"metadataOnly": false,
"routeOnly": false
},
"streamSettings": {
"network": "xhttp",
"security": "none",
"xhttpSettings": {
"headers": {},
"host": "",
"mode": "auto",
"noSSEHeader": false,
"path": "/",
"scMaxBufferedPosts": 30,
"scMaxEachPostBytes": "1000000",
"scStreamUpServerSecs": "10",
"seqKey": "",
"seqPlacement": "",
"sessionKey": "",
"sessionPlacement": "",
"uplinkChunkSize": 0,
"uplinkDataKey": "",
"uplinkDataPlacement": "",
"uplinkHTTPMethod": "",
"xPaddingBytes": "1-1000",
"xPaddingHeader": "",
"xPaddingKey": "",
"xPaddingMethod": "",
"xPaddingObfsMode": false,
"xPaddingPlacement": ""
}
},
"tag": "inbound-65300"
}
],
"log": {
"access": "none",
"error": "none",
"loglevel": "none",
"maskAddress": ""
},
"outbounds": [
{
"protocol": "freedom",
"settings": {
"domainStrategy": "ForceIPv4"
},
"tag": "direct"
},
{
"protocol": "blackhole",
"settings": {},
"tag": "blocked"
}
],
"policy": {
"levels": {
"0": {
"statsUserDownlink": true,
"statsUserUplink": true
}
},
"system": {
"statsInboundDownlink": true,
"statsInboundUplink": true
}
},
"reverse": null,
"routing": {
"domainStrategy": "AsIs",
"rules": [
]
}
}

Client log

none

Server log

infra/conf/serial: Reading config: &{Name:bin/config.json Format:json}
A unified platform for anti-censorship.
Xray 26.5.9 (Xray, Penetrates Everything.) 1bdb488 (go1.26.3 linux/amd64)
github.com/xtls/xray-core/app/proxyman/inbound/worker.go:142 +0x7a
created by github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).Start.func1 in goroutine 26551
github.com/xtls/xray-core/app/proxyman/inbound/worker.go:123 +0xdad
github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).callback(0x3b6e1d1200e0, {0x1897b20, 0x3b6e29b93a40})
github.com/xtls/xray-core/proxy/vless/inbound/inbound.go:633 +0x23bf
github.com/xtls/xray-core/proxy/vless/inbound.(*Handler).Process(0x3b6e1d2675f0, {0x188b050, 0x3b6e2a089a70}, 0x187e680?, {0x1897230, 0x3b6e2a089a10}, {0x1890380, 0x3b6e1db08dd0})
github.com/xtls/xray-core/common/mux/server.go:64 +0xda
github.com/xtls/xray-core/common/mux.(*Server).DispatchLink(0x1897440?, {0x188b050?, 0x3b6e269bae40?}, {{0x188b5d8?, 0x3b6e2630a144?}, 0xd3c0?, 0x3b6e?}, 0x2?)
github.com/xtls/xray-core/app/dispatcher/default.go:372 +0x872
}, 0x3b6e22c5d3e0)
github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).DispatchLink(0x3b6e1d67d0e0, {0x188b050, 0x3b6e269bae40}, {{0x188b5d8?, 0x3b6e2630a144?}, 0xb640?, 0x3b6e?
github.com/xtls/xray-core/app/dispatcher/default.go:504 +0xb26
github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).routedDispatch(0x3b6e1d67d0e0, {0x188b050, 0x3b6e269bae40}, 0x3b6e22c5d3e0, {{0x188b130, 0x3b6e25be8dc0}, 0x1bb, 0x2})
github.com/xtls/xray-core/app/proxyman/outbound/handler.go:242 +0x992
github.com/xtls/xray-core/app/proxyman/outbound.(*Handler).Dispatch(0x3b6e1db53e60, {0x188b050, 0x3b6e269bae40}, 0x3b6e22c5d3e0)
github.com/xtls/xray-core/proxy/freedom/freedom.go:297 +0x8cc
github.com/xtls/xray-core/proxy/freedom.(*Handler).Process(0x3b6e1dbb32f0, {0x188b050, 0x3b6e269bae40}, 0x3b6e22c5d3e0, {0x1888390, 0x3b6e1db53e60})
github.com/xtls/xray-core/common/retry/retry.go:27 +0xc3
github.com/xtls/xray-core/common/retry.(*retryer).On(0x3b6e29f4d070, 0x3b6e29f4d0a0)
github.com/xtls/xray-core/proxy/freedom/freedom.go:304 +0x24b
github.com/xtls/xray-core/proxy/freedom.(*Handler).Process.func1()
github.com/xtls/xray-core/transport/internet/dialer.go:92 +0x272
github.com/xtls/xray-core/transport/internet.LookupForIP({0x3b6e299d8000, 0x9a7}, 0x7, {0x0, 0x0?})
github.com/xtls/xray-core/app/dns/dns.go:263 +0x4f8
github.com/xtls/xray-core/app/dns.(*DNS).LookupIP(0x3b6e1d710700, {0x3b6e299d8000, 0x18?}, {0x0?, 0x31?, 0x72?})
github.com/xtls/xray-core/app/dns/dns.go:371 +0x2ab
github.com/xtls/xray-core/app/dns.(*DNS).serialQuery(0x3b6e1d710700, {0x3b6e299d8000, 0x9a7}, {0x0?, 0x0?, 0x0?})
github.com/xtls/xray-core/app/dns/nameserver.go:184 +0x25b
github.com/xtls/xray-core/app/dns.(*Client).QueryIP(0x3b6e1d276a80, {0x188b050?, 0x3b6e1d71c600?}, {0x3b6e299d8000, 0x9a7}, {0x0?, 0x0?, 0x0?})
github.com/xtls/xray-core/app/dns/nameserver_doh.go:238 +0x45
?, 0x0?}, {0x0?, 0x0?, 0x0?})
github.com/xtls/xray-core/app/dns.(*DoHNameServer).QueryIP(0x188b050?, {0x188b050?, 0x3b6e269baf30?}, {0x3b6e299d8000
github.com/xtls/xray-core/app/dns/nameserver_cached.go:47 +0x6d1
github.com/xtls/xray-core/app/dns.queryIP({0x188b050, 0x3b6e269baf30}, {0x187eee8, 0x3b6e1d113880}, {0x3b6e299d8000?, 0x17050a0?}, {0x1?, 0x0?, 0x0?})
github.com/xtls/xray-core/app/dns/nameserver_cached.go:68
github.com/xtls/xray-core/app/dns.fetch(...)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:113 +0x145
golang.org/x/sync/singleflight.(*Group).Do(0x3b6e1d276c28, {0x3b6e299d9500, 0x9a9}, 0x3b6e29f4c640)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:205 +0x99
golang.org/x/sync/singleflight.(*Group).doCall(0x15e3f60?, 0x3b6e1d5ee8d0?, {0x3b6e299d9500?, 0x9a9?}, 0x9a8?)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:170 +0x29b
golang.org/x/sync/singleflight.(*Group).doCall.func1()
goroutine 26633 [running]:

github.com/xtls/xray-core/app/proxyman/inbound/worker.go:142 +0x7a
created by github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).Start.func1 in goroutine 26551
github.com/xtls/xray-core/app/proxyman/inbound/worker.go:123 +0xdad
github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).callback(0x3b6e1d1200e0, {0x1897b20, 0x3b6e29b93a40})
github.com/xtls/xray-core/proxy/vless/inbound/inbound.go:633 +0x23bf
github.com/xtls/xray-core/proxy/vless/inbound.(*Handler).Process(0x3b6e1d2675f0, {0x188b050, 0x3b6e2a089a70}, 0x187e680?, {0x1897230, 0x3b6e2a089a10}, {0x1890380, 0x3b6e1db08dd0})
2026/05/27 20:51:08 DEBUG - X-UI: Core crash detected: panic({0x150e3e0?, 0x3b6e25be8f20?}) runtime/panic.go:860 +0x46a golang.org/x/net/dns/dnsmessage.MustNewName(...) golang.org/x/net@v0.53.0/dns/dnsmessage/message.go:1952 github.com/xtls/xray-core/app/dns.buildReqMsgs({0x3b6e299d8a80, 0x9a8}, {0x0?, 0x0?, 0x0?}, 0x3b6e29f4c150, 0x3b6e297625a0) github.com/xtls/xray-core/app/dns/dnscommon.go:132 +0xc0a github.com/xtls/xray-core/app/dns.(*DoHNameServer).sendQuery(0x3b6e1d113880, {0x188b050, 0x3b6e269baf30}, 0x3b6e299c6d90, {0x3b6e299d8a80, 0x9a8}, {0x0?, 0x0?, 0x0?}) github.com/xtls/xray-core/app/dns/nameserver_doh.go:147 +0x265 github.com/xtls/xray-core/app/dns.doFetch({0x188b050, 0x3b6e269baf30}, {0x187eee8, 0x3b6e1d113880}, {0x3b6e299d8a80, 0x9a8}, {0x80?, 0xa9?, 0xec?}) github.com/xtls/xray-core/app/dns/nameserver_cached.go:103 +0x284 github.com/xtls/xray-core/app/dns.queryIP.fetch.func1() github.com/xtls/xray-core/app/dns/nameserver_cached.go:69 +0x46 golang.org/x/sync/singleflight.(*Group).doCall.func2(0x3b6e29f4c4ae, 0x3b6e2977d360, 0x3?) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:198 +0x55 golang.org/x/sync/singleflight.(*Group).doCall(0x15e3f60?, 0x3b6e1d5ee8d0?, {0x3b6e299d9500?, 0x9a9?}, 0x9a8?) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:200 +0x7e golang.org/x/sync/singleflight.(*Group).Do(0x3b6e1d276c28, {0x3b6e299d9500, 0x9a9}, 0x3b6e29f4c640) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:113 +0x145 github.com/xtls/xray-core/app/dns.fetch(...) github.com/xtls/xray-core/app/dns/nameserver_cached.go:68 github.com/xtls/xray-core/app/dns.queryIP({0x188b050, 0x3b6e269baf30}, {0x187eee8, 0x3b6e1d113880}, {0x3b6e299d8000?, 0x17050a0?}, {0x1?, 0x0?, 0x0?}) github.com/xtls/xray-core/app/dns/nameserver_cached.go:47 +0x6d1 github.com/xtls/xray-core/app/dns.(*DoHNameServer).QueryIP(0x188b050?, {0x188b050?, 0x3b6e269baf30?}, {0x3b6e299d8000?, 0x0?}, {0x0?, 0x0?, 0x0?}) github.com/xtls/xray-core/app/dns/nameserver_doh.go:238 +0x45 github.com/xtls/xray-core/app/dns.(*Client).QueryIP(0x3b6e1d276a80, {0x188b050?, 0x3b6e1d71c600?}, {0x3b6e299d8000, 0x9a7}, {0x0?, 0x0?, 0x0?}) github.com/xtls/xray-core/app/dns/nameserver.go:184 +0x25b github.com/xtls/xray-core/app/dns.(*DNS).serialQuery(0x3b6e1d710700, {0x3b6e299d8000, 0x9a7}, {0x0?, 0x0?, 0x0?}) github.com/xtls/xray-core/app/dns/dns.go:371 +0x2ab github.com/xtls/xray-core/app/dns.(*DNS).LookupIP(0x3b6e1d710700, {0x3b6e299d8000, 0x18?}, {0x0?, 0x31?, 0x72?}) github.com/xtls/xray-core/app/dns/dns.go:263 +0x4f8 github.com/xtls/xray-core/transport/internet.LookupForIP({0x3b6e299d8000, 0x9a7}, 0x7, {0x0, 0x0?}) github.com/xtls/xray-core/transport/internet/dialer.go:92 +0x272 github.com/xtls/xray-core/proxy/freedom.(*Handler).Process.func1() github.com/xtls/xray-core/proxy/freedom/freedom.go:304 +0x24b github.com/xtls/xray-core/common/retry.(*retryer).On(0x3b6e29f4d070, 0x3b6e29f4d0a0) github.com/xtls/xray-core/common/retry/retry.go:27 +0xc3 github.com/xtls/xray-core/proxy/freedom.(*Handler).Process(0x3b6e1dbb32f0, {0x188b050, 0x3b6e269bae40}, 0x3b6e22c5d3e0, {0x1888390, 0x3b6e1db53e60}) github.com/xtls/xray-core/proxy/freedom/freedom.go:297 +0x8cc github.com/xtls/xray-core/app/proxyman/outbound.(*Handler).Dispatch(0x3b6e1db53e60, {0x188b050, 0x3b6e269bae40}, 0x3b6e22c5d3e0) github.com/xtls/xray-core/app/proxyman/outbound/handler.go:242 +0x992 github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).routedDispatch(0x3b6e1d67d0e0, {0x188b050, 0x3b6e269bae40}, 0x3b6e22c5d3e0, {{0x188b130, 0x3b6e25be8dc0}, 0x1bb, 0x2}) github.com/xtls/xray-core/app/dispatcher/default.go:504 +0xb26 github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).DispatchLink(0x3b6e1d67d0e0, {0x188b050, 0x3b6e269bae40}, {{0x188b5d8?, 0x3b6e2630a144?}, 0xb640?, 0x3b6e?}, 0x3b6e22c5d3e0) github.com/xtls/xray-core/app/dispatcher/default.go:372 +0x872 github.com/xtls/xray-core/common/mux.(*Server).DispatchLink(0x1897440?, {0x188b050?, 0x3b6e269bae40?}, {{0x188b5d8?, 0x3b6e2630a144?}, 0xd3c0?, 0x3b6e?}, 0x2?) github.com/xtls/xray-core/common/mux/server.go:64 +0xda
2026/05/27 20:51:08 DEBUG - X-UI: Core crash detected: panic: creating name: insufficient data for calculated length type runtime/debug.Stack(...) runtime/debug/stack.go:26 golang.org/x/sync/singleflight.newPanicError(...) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:44 golang.org/x/sync/singleflight.(*Group).doCall.func2.1() golang.org/x/sync@v0.20.0/singleflight/singleflight.go:193 +0x90
2026/05/27 20:51:05 INFO - XRAY: infra/conf/serial: Reading config: &{Name:bin/config.json Format:json}
2026/05/27 20:51:05 DEBUG - XRAY: A unified platform for anti-censorship.
2026/05/27 20:51:05 DEBUG - XRAY: Xray 26.5.9 (Xray, Penetrates Everything.) 1bdb488 (go1.26.3 linux/amd64)
2026/05/27 20:51:05 DEBUG - X-UI: restart xray, force:false
2026/05/27 20:50:26 ERROR - X-UI: Failure in running xray-core: exit status 2
github.com/xtls/xray-core/app/proxyman/inbound/worker.go:142 +0x7a
created by github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).Start.func1 in goroutine 4727862
github.com/xtls/xray-core/app/proxyman/inbound/worker.go:123 +0xdad
github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).callback(0x3105af038000, {0x1897b20, 0x3105e9b4c4b0})
github.com/xtls/xray-core/proxy/vless/inbound/inbound.go:633 +0x23bf
github.com/xtls/xray-core/proxy/vless/inbound.(*Handler).Process(0x3105ae7f62d0, {0x188b050, 0x3105d8c54510}, 0x187e680?, {0x1897230, 0x3105d8c544b0}, {0x1890380, 0x3105af00cf10})
github.com/xtls/xray-core/common/mux/server.go:64 +0xda
github.com/xtls/xray-core/common/mux.(*Server).DispatchLink(0x1897440?, {0x188b050?, 0x3105d8c39650?}, {{0x188b5d8?, 0x3105b9a6a2dc?}, 0xf800?, 0x3105?}, 0x2?)
github.com/xtls/xray-core/app/dispatcher/default.go:372 +0x872
github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).DispatchLink(0x3105aed485f0, {0x188b050, 0x3105d8c39650}, {{0x188b5d8?, 0x3105b9a6a2dc?}, 0x9640?, 0x3105?}, 0x3105b056f820)
github.com/xtls/xray-core/app/dispatcher/default.go:504 +0xb26
github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).routedDispatch(0x3105aed485f0, {0x188b050, 0x3105d8c39650}, 0x3105b056f820, {{0x188b130, 0x3105d233e370}, 0x1bb, 0x2})
github.com/xtls/xray-core/app/proxyman/outbound/handler.go:242 +0x992
github.com/xtls/xray-core/app/proxyman/outbound.(*Handler).Dispatch(0x3105aec06cf0, {0x188b050, 0x3105d8c39650}, 0x3105b056f820)
github.com/xtls/xray-core/proxy/freedom/freedom.go:297 +0x8cc
github.com/xtls/xray-core/proxy/freedom.(*Handler).Process(0x3105af033950, {0x188b050, 0x3105d8c39650}, 0x3105b056f820, {0x1888390, 0x3105aec06cf0})
github.com/xtls/xray-core/common/retry/retry.go:27 +0xc3
github.com/xtls/xray-core/common/retry.(*retryer).On(0x3105cf19b070, 0x3105cf19b0a0)
github.com/xtls/xray-core/proxy/freedom/freedom.go:304 +0x24b
github.com/xtls/xray-core/proxy/freedom.(*Handler).Process.func1()
github.com/xtls/xray-core/transport/internet/dialer.go:92 +0x272
github.com/xtls/xray-core/transport/internet.LookupForIP({0x3105cdcbed80, 0x403}, 0x7, {0x0, 0x0?})
github.com/xtls/xray-core/app/dns/dns.go:263 +0x4f8
?, 0x72?})
github.com/xtls/xray-core/app/dns.(*DNS).LookupIP(0x3105aed2dd80, {0x3105cdcbed80, 0x18?}, {0x0?, 0x31
github.com/xtls/xray-core/app/dns/dns.go:371 +0x2ab
github.com/xtls/xray-core/app/dns.(*DNS).serialQuery(0x3105aed2dd80, {0x3105cdcbed80, 0x403}, {0x9c?, 0xbc?, 0x93?})
github.com/xtls/xray-core/app/dns/nameserver.go:184 +0x25b
github.com/xtls/xray-core/app/dns.(*Client).QueryIP(0x3105aea81180, {0x188b050?, 0x3105aed54510?}, {0x3105cdcbed80, 0x403}, {0x30?, 0x9e?, 0x11?})
github.com/xtls/xray-core/app/dns/nameserver_doh.go:238 +0x45
github.com/xtls/xray-core/app/dns.(*DoHNameServer).QueryIP(0x188b050?, {0x188b050?, 0x3105d8c39770?}, {0x3105cdcbed80?, 0x3105c9178768?}, {0xf4?, 0x95?, 0x42?})
github.com/xtls/xray-core/app/dns/nameserver_cached.go:47 +0x6d1
github.com/xtls/xray-core/app/dns.queryIP({0x188b050, 0x3105d8c39770}, {0x187eee8, 0x3105ae8bc540}, {0x3105cdcbed80?, 0x17050a0?}, {0x1?, 0x0?, 0x0?})
github.com/xtls/xray-core/app/dns/nameserver_cached.go:68
github.com/xtls/xray-core/app/dns.fetch(...)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:113 +0x145
golang.org/x/sync/singleflight.(*Group).Do(0x3105aea812b8, {0x3105cdcbf680, 0x405}, 0x3105cf19a640)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:205 +0x99
golang.org/x/sync/singleflight.(*Group).doCall(0x15e3f60?, 0x3105b0203740?, {0x3105cdcbf680?, 0x405?}, 0x404?)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:170 +0x29b
golang.org/x/sync/singleflight.(*Group).doCall.func1()
goroutine 4727866 [running]:

github.com/xtls/xray-core/app/proxyman/inbound/worker.go:142 +0x7a
created by github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).Start.func1 in goroutine 4727862
github.com/xtls/xray-core/app/proxyman/inbound/worker.go:123 +0xdad
github.com/xtls/xray-core/app/proxyman/inbound.(*tcpWorker).callback(0x3105af038000, {0x1897b20, 0x3105e9b4c4b0})
github.com/xtls/xray-core/proxy/vless/inbound/inbound.go:633 +0x23bf
github.com/xtls/xray-core/proxy/vless/inbound.(*Handler).Process(0x3105ae7f62d0, {0x188b050, 0x3105d8c54510}, 0x187e680?, {0x1897230, 0x3105d8c544b0}, {0x1890380, 0x3105af00cf10})
github.com/xtls/xray-core/common/mux/server.go:64 +0xda
github.com/xtls/xray-core/common/mux.(*Server).DispatchLink(0x1897440?, {0x188b050?, 0x3105d8c39650?}, {{0x188b5d8?, 0x3105b9a6a2dc?}, 0xf800?, 0x3105?}, 0x2?)
github.com/xtls/xray-core/app/dispatcher/default.go:372 +0x872
github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).DispatchLink(0x3105aed485f0, {0x188b050, 0x3105d8c39650}, {{0x188b5d8?, 0x3105b9a6a2dc?}, 0x9640?, 0x3105?}, 0x3105b056f820)
github.com/xtls/xray-core/app/dispatcher/default.go:504 +0xb26
github.com/xtls/xray-core/app/dispatcher.(*DefaultDispatcher).routedDispatch(0x3105aed485f0, {0x188b050, 0x3105d8c39650}, 0x3105b056f820, {{0x188b130, 0x3105d233e370}, 0x1bb, 0x2})
github.com/xtls/xray-core/app/proxyman/outbound/handler.go:242 +0x992
github.com/xtls/xray-core/app/proxyman/outbound.(*Handler).Dispatch(0x3105aec06cf0, {0x188b050, 0x3105d8c39650}, 0x3105b056f820)
github.com/xtls/xray-core/proxy/freedom/freedom.go:297 +0x8cc
github.com/xtls/xray-core/proxy/freedom.(*Handler).Process(0x3105af033950, {0x188b050, 0x3105d8c39650}, 0x3105b056f820, {0x1888390, 0x3105aec06cf0})
github.com/xtls/xray-core/common/retry/retry.go:27 +0xc3
github.com/xtls/xray-core/common/retry.(*retryer).On(0x3105cf19b070, 0x3105cf19b0a0)
github.com/xtls/xray-core/proxy/freedom/freedom.go:304 +0x24b
github.com/xtls/xray-core/proxy/freedom.(*Handler).Process.func1()
github.com/xtls/xray-core/transport/internet/dialer.go:92 +0x272
github.com/xtls/xray-core/transport/internet.LookupForIP({0x3105cdcbed80, 0x403}, 0x7, {0x0, 0x0?})
github.com/xtls/xray-core/app/dns/dns.go:263 +0x4f8
github.com/xtls/xray-core/app/dns.(*DNS).LookupIP(0x3105aed2dd80, {0x3105cdcbed80, 0x18?}, {0x0?, 0x31?, 0x72?})
github.com/xtls/xray-core/app/dns/dns.go:371 +0x2ab
github.com/xtls/xray-core/app/dns.(*DNS).serialQuery(0x3105aed2dd80, {0x3105cdcbed80, 0x403}, {0x9c?, 0xbc?, 0x93?})
github.com/xtls/xray-core/app/dns/nameserver.go:184 +0x25b
github.com/xtls/xray-core/app/dns.(*Client).QueryIP(0x3105aea81180, {0x188b050?, 0x3105aed54510?}, {0x3105cdcbed80, 0x403}, {0x30?, 0x9e?, 0x11?})
github.com/xtls/xray-core/app/dns/nameserver_doh.go:238 +0x45
github.com/xtls/xray-core/app/dns.(*DoHNameServer).QueryIP(0x188b050?, {0x188b050?, 0x3105d8c39770?}, {0x3105cdcbed80?, 0x3105c9178768?}, {0xf4?, 0x95?, 0x42?})
github.com/xtls/xray-core/app/dns/nameserver_cached.go:47 +0x6d1
github.com/xtls/xray-core/app/dns.queryIP({0x188b050, 0x3105d8c39770}, {0x187eee8, 0x3105ae8bc540}, {0x3105cdcbed80?, 0x17050a0?}, {0x1?, 0x0?, 0x0?})
github.com/xtls/xray-core/app/dns/nameserver_cached.go:68
github.com/xtls/xray-core/app/dns.fetch(...)
golang.org/x/sync@v0.20.0/singleflight/singleflight.go:113 +0x145
golang.org/x/sync/singleflight.(*Group).Do(0x3105aea812b8, {0x3105cdcbf680, 0x405}, 0x3105cf19a640)
2026/05/27 20:50:25 DEBUG - X-UI: Core crash detected: panic: creating name: insufficient data for calculated length type runtime/debug.Stack(...) runtime/debug/stack.go:26 golang.org/x/sync/singleflight.newPanicError(...) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:44 golang.org/x/sync/singleflight.(*Group).doCall.func2.1() golang.org/x/sync@v0.20.0/singleflight/singleflight.go:193 +0x90 panic({0x150e3e0?, 0x3105d233e430?}) runtime/panic.go:860 +0x46a golang.org/x/net/dns/dnsmessage.MustNewName(...) golang.org/x/net@v0.53.0/dns/dnsmessage/message.go:1952 github.com/xtls/xray-core/app/dns.buildReqMsgs({0x3105cdcbf200, 0x404}, {0x0?, 0x0?, 0x0?}, 0x3105cf19a150, 0x3105c82bcea0) github.com/xtls/xray-core/app/dns/dnscommon.go:132 +0xc0a github.com/xtls/xray-core/app/dns.(*DoHNameServer).sendQuery(0x3105ae8bc540, {0x188b050, 0x3105d8c39770}, 0x3105cd64ebd0, {0x3105cdcbf200, 0x404}, {0xcd?, 0x9e?, 0x6e?}) github.com/xtls/xray-core/app/dns/nameserver_doh.go:147 +0x265 github.com/xtls/xray-core/app/dns.doFetch({0x188b050, 0x3105d8c39770}, {0x187eee8, 0x3105ae8bc540}, {0x3105cdcbf200, 0x404}, {0x28?, 0xa7?, 0x51?}) github.com/xtls/xray-core/app/dns/nameserver_cached.go:103 +0x284 github.com/xtls/xray-core/app/dns.queryIP.fetch.func1() github.com/xtls/xray-core/app/dns/nameserver_cached.go:69 +0x46 golang.org/x/sync/singleflight.(*Group).doCall.func2(0x3105cf19a4ae, 0x3105b6b2fea0, 0x1?) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:198 +0x55 golang.org/x/sync/singleflight.(*Group).doCall(0x15e3f60?, 0x3105b0203740?, {0x3105cdcbf680?, 0x405?}, 0x404?) golang.org/x/sync@v0.20.0/singleflight/singleflight.go:200 +0x7e

[Meo597]

try https://github.com/XTLS/Xray-core/actions/runs/26572930054

[Meo597]

有 DNS 日志吗，看看到底是什么域名
正常不该出现，是不是有人构造恶意请求

[megasoheilsh]

Do you have DNS logs? Check what domain name it is . This shouldn't be happening normally; could someone be creating malicious requests?

Hi, thanks for replying and congratulations on being added as a new xray core developer.
I run xray it in Docker, checking the xray logs inside Docker is a bit difficult, I will try my best and report back.

[megasoheilsh]

try https://github.com/XTLS/Xray-core/actions/runs/26572930054

I will place it now and announce the result.

[megasoheilsh]

try https://github.com/XTLS/Xray-core/actions/runs/26572930054

The problem is solved, the server is running. If I see any problems, I will let you know. Thank you.

[megasoheilsh]

The problem has been completely resolved and the xray has not crashed for 1 hour and 30 minutes now (it used to crash every 5 to 10 minutes).

[Meo597]

v2ray/v2ray-core@6ef7724
这个问题至少存在七年了

正常的客户端不会构造这种请求
我想是有人故意捣乱
所以我才想看看 dnslog (无关紧要)

[megasoheilsh]

This issue with v2ray/v2ray-core@ 6ef7724 has existed for at least seven years.

A normal client wouldn't construct such a request. I suspect someone is deliberately causing trouble, which is why I wanted to check the DNS log (irrelevant).

What is a malicious DNS example? Who knows what would cause such a crash?

[Meo597]

panic: creating name: insufficient data for calculated length type

fqdn 最大长度 255
有人故意构造了比它长的域名

[megasoheilsh]

panic: creating name: insufficient data for calculated length type

The maximum length of fqdn is 255 characters; some people have deliberately created domain names that are longer than that.

Yes, that's right, the client can do whatever it wants, but why should the xray crash? :D

[Meo597]

得益于祖传屎山代码

[megasoheilsh]

得益于祖传屎山代码

please migrate new changes to main branch , thanks