Hi, I'm experiencing a segmentation fault caused by adding "disabled" ( http://docs.haproxy.org/2.4/configuration.html#4-disabled) to the frontend section of haproxy configuration file. That frontend does not handle any traffic yet.
The "disabled" keyword was used on other frontends on the same HAProxy instance before without any issue. The difference is that this time it was added to frontend with spoe filter. This probably causes a crash when processing requests on a different heavily used frontend (also spoe enabled). It crashes after 2-10s under production traffic. I couldn't replicate it with a synthetic test, however I have a coredump and packages with HAProxy binary and debug symbols. (gdb) bt #0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=140527117211200) at ./nptl/pthread_kill.c:44 #1 __pthread_kill_internal (signo=6, threadid=140527117211200) at ./nptl/pthread_kill.c:78 #2 __GI___pthread_kill (threadid=140527117211200, signo=signo@entry=6) at ./nptl/pthread_kill.c:89 #3 0x00007fcf0881a476 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 #4 0x00007fcf088007f3 in __GI_abort () at ./stdlib/abort.c:79 #5 0x0000558f48524feb in ha_panic () at src/debug.c:333 #6 0x0000558f486be1af in wdt_handler (sig=14, si=0x7fcf04e4d3f0, arg=0x7fcf04e4d2c0) at src/wdt.c:122 #7 <signal handler called> #8 0x0000558f48469895 in pattern_exec_match (head=0x558f69fe67b8, smp=0x7fcf04e4e080, fill=0) at src/pattern.c:2498 #9 0x0000558f485a0bf2 in acl_exec_cond (cond=0x558f69fe69a0, px=0x558f69f67cf0, sess=0x7fce50243cd0, strm=0x7fce5020a4b0, opt=6) at src/acl.c:1123 #10 0x0000558f483b5eea in spoe_encode_message (s=0x7fce5020a4b0, ctx=0x7fce5026ddf0, msg=0x558f69fe2650, dir=0, buf=0x7fcf04e4e1b0, end=0x7fce502a627c "") at src/flt_spoe.c:2185 #11 0x0000558f483b6259 in spoe_encode_messages (s=0x7fce5020a4b0, ctx=0x7fce5026ddf0, messages=0x558f69fe23a0, dir=0, type=1) at src/flt_spoe.c:2285 #12 0x0000558f483b75a4 in spoe_process_messages (s=0x7fce5020a4b0, ctx=0x7fce5026ddf0, messages=0x558f69fe23a0, dir=0, type=1) at src/flt_spoe.c:2726 #13 0x0000558f483b79d0 in spoe_process_event (s=0x7fce5020a4b0, ctx=0x7fce5026ddf0, ev=SPOE_EV_ON_HTTP_REQ_FE) at src/flt_spoe.c:2842 #14 0x0000558f483b8eeb in spoe_chn_pre_analyze (s=0x7fce5020a4b0, filter=0x7fce5025c920, chn=0x7fce5020a4c0, an_bit=16) at src/flt_spoe.c:3324 #15 0x0000558f48549976 in flt_pre_analyze (s=0x7fce5020a4b0, chn=0x7fce5020a4c0, an_bit=16) at src/filters.c:764 #16 0x0000558f4836aaff in process_stream (t=0x7fce50242f30, context=0x7fce5020a4b0, state=260) at src/stream.c:1918 #17 0x0000558f4857aa3c in run_tasks_from_lists (budgets=0x7fcf04e4e5a0) at src/task.c:597 #18 0x0000558f4857b485 in process_runnable_tasks () at src/task.c:838 #19 0x0000558f484d0eb5 in run_poll_loop () at src/haproxy.c:2630 #20 0x0000558f484d1423 in run_thread_poll_loop (data=0x5) at src/haproxy.c:2805 #21 0x00007fcf0886cb43 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442 #22 0x00007fcf088fea00 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81 haproxy -vv HAProxy version 2.4.22-f8e3218 2023/02/14 - https://haproxy.org/ Status: long-term supported branch - will stop receiving fixes around Q2 2026. Known bugs: http://www.haproxy.org/bugs/bugs-2.4.22.html Running on: Linux 5.15.0-69-generic #76-Ubuntu SMP Fri Mar 17 17:19:29 UTC 2023 x86_64 Build options : TARGET = linux-glibc CPU = generic CC = cc CFLAGS = -O0 -g -Wall -Wextra -Wdeclaration-after-statement -fwrapv -Wno-unused-label -Wno-sign-compare -Wno-unused-parameter -Wno-clobbered -Wno-missing-field-initializers -Wtype-limits -Wshift-negative-value -Wshift-overflow=2 -Wduplicated-cond -Wnull-dereference -DMAX_SESS_STKCTR=12 OPTIONS = USE_PCRE2=1 USE_PCRE2_JIT=1 USE_GETADDRINFO=1 USE_OPENSSL=1 USE_LUA=1 USE_ZLIB=1 USE_DL=1 USE_PROMEX=1 DEBUG = Feature list : -51DEGREES +ACCEPT4 +BACKTRACE -CLOSEFROM +CPU_AFFINITY +CRYPT_H -DEVICEATLAS +DL +EPOLL -EVPORTS +FUTEX +GETADDRINFO -KQUEUE +LIBCRYPT +LINUX_SPLICE +LINUX_TPROXY +LUA -MEMORY_PROFILING +NETFILTER +NS -OBSOLETE_LINKER +OPENSSL -OT -PCRE +PCRE2 +PCRE2_JIT -PCRE_JIT +POLL +PRCTL -PRIVATE_CACHE -PROCCTL +PROMEX -PTHREAD_PSHARED -QUIC +RT -SLZ -STATIC_PCRE -STATIC_PCRE2 -SYSTEMD +TFO +THREAD +THREAD_DUMP +TPROXY -WURFL +ZLIB Default settings : bufsize = 16384, maxrewrite = 1024, maxpollevents = 200 Built with multi-threading support (MAX_THREADS=64, default=4). Built with OpenSSL version : OpenSSL 1.1.1t 7 Feb 2023 Running on OpenSSL version : OpenSSL 1.1.1t 7 Feb 2023 OpenSSL library supports TLS extensions : yes OpenSSL library supports SNI : yes OpenSSL library supports : TLSv1.0 TLSv1.1 TLSv1.2 TLSv1.3 Built with Lua version : Lua 5.3.5 Built with the Prometheus exporter as a service Built with network namespace support. Built with zlib version : 1.2.11 Running on zlib version : 1.2.11 Compression algorithms supported : identity("identity"), deflate("deflate"), raw-deflate("deflate"), gzip("gzip") Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND Built with PCRE2 version : 10.39 2021-10-29 PCRE2 library supports JIT : yes Encrypted password support via crypt(3): yes Built with gcc compiler version 7.5.0 Available polling systems : epoll : pref=300, test result OK poll : pref=200, test result OK select : pref=150, test result OK Total: 3 (3 usable), will use epoll. Available multiplexer protocols : (protocols marked as <default> cannot be specified using 'proto' keyword) h2 : mode=HTTP side=FE|BE mux=H2 flags=HTX|CLEAN_ABRT|HOL_RISK|NO_UPG fcgi : mode=HTTP side=BE mux=FCGI flags=HTX|HOL_RISK|NO_UPG h1 : mode=HTTP side=FE|BE mux=H1 flags=HTX|NO_UPG <default> : mode=HTTP side=FE|BE mux=H1 flags=HTX none : mode=TCP side=FE|BE mux=PASS flags=NO_UPG <default> : mode=TCP side=FE|BE mux=PASS flags= Available services : prometheus-exporter Available filters : [SPOE] spoe [CACHE] cache [FCGI] fcgi-app [COMP] compression [TRACE] trace
