rysinal created GUACAMOLE-2152:
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Summary: guacd 1.6.0 segfault in ld-musl-x86_64.so.1(unable to
allocate a TLS)
Key: GUACAMOLE-2152
URL: https://issues.apache.org/jira/browse/GUACAMOLE-2152
Project: Guacamole
Issue Type: Bug
Components: guacamole
Affects Versions: 1.6.0
Reporter: rysinal
When using the Docker image of guacd (v1.6.0) as an RDP gateway, I
intermittently encounter frame error issues. RDP connections fail
intermittently, and the system kernel logs are roughly of the following type:
123. The issue is resolved after restarting the guacd container, but it
reoccurs after some time.
{code:java}
sl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:05:23.616465+08:00 109238250-Ops kernel: [1502095.219872]
guacd[2838887]: segfault at 7fd2e3ef5bf8 ip 00007fcb49b874c8 sp
00007fcae3ef22e8 error 4 in ld-musl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:05:28.468456+08:00 109238250-Ops kernel: [1502100.070967]
guacd[2838939]: segfault at 7fd2e509bbf8 ip 00007fcb49b874c8 sp
00007fcae50982e8 error 4 in ld-musl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:05:31.832456+08:00 109238250-Ops kernel: [1502103.435494]
guacd[2838991]: segfault at 7fd2e3ef5bf8 ip 00007fcb49b874c8 sp
00007fcae3ef22e8 error 4 in ld-musl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:05:39.904524+08:00 109238250-Ops kernel: [1502111.509135]
guacd[2839069]: segfault at 7fd2e4f22bf8 ip 00007fcb49b874c8 sp
00007fcae4f1f2e8 error 4 in ld-musl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:05:45.216458+08:00 109238250-Ops kernel: [1502116.817487]
guacd[2839124]: segfault at 7fd2e52bfbf8 ip 00007fcb49b874c8 sp
00007fcae52bc2e8 error 4 in ld-musl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:05:55.156459+08:00 109238250-Ops kernel: [1502126.758582]
guacd[2839208]: segfault at 7fd2e4f22bf8 ip 00007fcb49b874c8 sp
00007fcae4f1f2e8 error 4 in ld-musl-x86_64.so.1[7fcb49b44000+4c000]
2025-10-11T15:20:22.840459+08:00 109238250-Ops kernel: [1502994.425825]
guacd[2848166]: segfault at 7f8510ddb1a0 ip 00007f851a0b5b3d sp
00007f84d7741190 error 4
2025-10-11T15:20:22.840482+08:00 109238250-Ops kernel: [1502994.425833]
guacd[2848170]: segfault at 7f8510ddb2b8 ip 00007f851a0b5b3d sp
00007f84d5729190 error 4
2025-10-11T15:20:22.840485+08:00 109238250-Ops kernel: [1502994.425843]
guacd[2848179]: segfault at 7f8510ddb3d0 ip 00007f851a0b5b3d sp
00007f84d0ef3190 error 4
2025-10-11T15:20:22.840486+08:00 109238250-Ops kernel: [1502994.425846]
guacd[2848177]: segfault at 7f8510ddb4e8 ip 00007f851a0b5b3d sp
00007f84d1eff190 error 4
2025-10-11T15:25:14.684471+08:00 109238250-Ops kernel: [1503286.264410]
guacd[2850857]: segfault at 7f85173e9240 ip 00007f851c8e0b3d sp
00007f84d7f47190 error 4 {code}
Two types of logs related to the guacd container have been identified as
potentially relevant:
{code:java}
{"log":"guacd[635479]: DEBUG:\u0009SSL_CTX_new
failed\n","stream":"stderr","time":"2025-10-11T06:40:24.55282166Z"} {code}
{code:java}
{"log":"guacd[645564]: DEBUG:\u0009Major bug, unable to allocate a TLS value
for currentThread\n","stream":"stderr","time":"2025-10-11T07:05:55.15411298Z"}
{code}
Based on the information searched using the log details, I have also tried
recompiling the guacd image. The Dockerfile uses debian:bookworm-slim as the
base image, yet the problem still occurs after a period of time. Please help
verify and resolve this issue.
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