ldc AddressSanitizer: stack-overflow from getAddress inside a fiber

EndeavourOS/Arch x86_64, ldc 1.40.0 from repos and from the install.sh script.

If I compile my project with -fsanitize=address it crashes at runtime with a stack overflow.

Reduced;

import std;
import core.thread;

void main()
{
    void dg()
    {
        getAddress("irc.libera.chat");
    }

    auto fiber = new Fiber(&dg);
    fiber.call();
}

$ ldc -fsanitize=address -run test.d
AddressSanitizer:DEADLYSIGNAL
=================================================================
==38083==ERROR: AddressSanitizer: stack-overflow on address 0x7d4953bd3d48 (pc 0x7d4954248cd3 bp 0x7d4953bd4590 sp 0x7d4953bd3d50 T0)
#0 0x7d4954248cd3 in __libc_ns_samename /usr/src/debug/glibc/glibc/resolv/ns_samename.c:30:7
#1 0x7d495424bdc4 in __libc_res_nameinquery /usr/src/debug/glibc/glibc/resolv/res_nameinquery.c:111:14
#2 0x7d495424beef in __GI___libc_res_queriesmatch /usr/src/debug/glibc/glibc/resolv/res_queriesmatch.c:125:12
#3 0x7d495424e92b in send_dg /usr/src/debug/glibc/glibc/resolv/res_send.c:1223:7
#4 0x7d495424f433 in __res_context_send /usr/src/debug/glibc/glibc/resolv/res_send.c:373:8
#5 0x7d495424c163 in __res_context_query /usr/src/debug/glibc/glibc/resolv/res_query.c:218:10
#6 0x7d495424cf36 in __res_context_querydomain /usr/src/debug/glibc/glibc/resolv/res_query.c:629:9
#7 0x7d495424cf36 in __res_context_search /usr/src/debug/glibc/glibc/resolv/res_query.c:385:9
#8 0x7d4954244c90 in __GI__nss_dns_gethostbyname4_r /usr/src/debug/glibc/glibc/resolv/nss_dns/dns-host.c:418:11
#9 0x7d495425d711 in get_nss_addresses /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:652:17
#10 0x7d495425d711 in gaih_inet /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:1185:17
#11 0x7d495425d711 in getaddrinfo /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:2390:12
#12 0x5d3b0642d199 in getaddrinfo.part.0 asan_interceptors.cpp.o
#13 0x7d49545d4461 in _D3std6socket18getAddressInfoImplFMAxaMQePS4core3sys5posix5netdb8addrinfoZASQCwQCv11AddressInfo (/usr/lib/libphobos2-ldc-shared.so.110+0x1d4461) (BuildId: 99b0a4bdd1c37b27fb8336d379aedecc33d04375)
#14 0x7d49545d4b2d in _D3std6socket10getAddressFNfMAxaMQeZACQBkQBj7Address (/usr/lib/libphobos2-ldc-shared.so.110+0x1d4b2d) (BuildId: 99b0a4bdd1c37b27fb8336d379aedecc33d04375)
#15 0x5d3b063482eb in _D4test4mainFZ2dgMFNfZv (/tmp/test-6842be+0x82eb) (BuildId: 8e3e05de8c6c55b75b2cd6406dd293a490acba44)
#16 0x7d4954965642 in fiber_entryPoint (/usr/lib/libdruntime-ldc-shared.so.110+0xd7642) (BuildId: c4197bdbc13200c6ab1e7c45a0e639610fd85b3f)

SUMMARY: AddressSanitizer: stack-overflow /usr/src/debug/glibc/glibc/resolv/ns_samename.c:30:7 in __libc_ns_samename
==38083==ABORTING
Error: /tmp/test-6842be failed with status: 1

Mar 11 '25 10:03 zorael

Can you try running with ASAN_OPTIONS=detect_stack_use_after_return=0? (compile to binary and then run the binary with that environment variable set) https://forum.dlang.org/post/[email protected]

Mar 11 '25 16:03 JohanEngelen

It seems to give the same error.

$ ASAN_OPTIONS=detect_stack_use_after_return=0 ldc -fsanitize=address -run test.d
AddressSanitizer:DEADLYSIGNAL
=================================================================
==370888==ERROR: AddressSanitizer: stack-overflow on address 0x7e80f2996d48 (pc 0x7e80f3048cd3 bp 0x7e80f2997590 sp 0x7e80f2996d50 T0)
#0 0x7e80f3048cd3 in __libc_ns_samename /usr/src/debug/glibc/glibc/resolv/ns_samename.c:30:7
#1 0x7e80f304bdc4 in __libc_res_nameinquery /usr/src/debug/glibc/glibc/resolv/res_nameinquery.c:111:14
#2 0x7e80f304beef in __GI___libc_res_queriesmatch /usr/src/debug/glibc/glibc/resolv/res_queriesmatch.c:125:12
#3 0x7e80f304e92b in send_dg /usr/src/debug/glibc/glibc/resolv/res_send.c:1223:7
#4 0x7e80f304f433 in __res_context_send /usr/src/debug/glibc/glibc/resolv/res_send.c:373:8
#5 0x7e80f304c163 in __res_context_query /usr/src/debug/glibc/glibc/resolv/res_query.c:218:10
#6 0x7e80f304cf36 in __res_context_querydomain /usr/src/debug/glibc/glibc/resolv/res_query.c:629:9
#7 0x7e80f304cf36 in __res_context_search /usr/src/debug/glibc/glibc/resolv/res_query.c:385:9
#8 0x7e80f3044c90 in __GI__nss_dns_gethostbyname4_r /usr/src/debug/glibc/glibc/resolv/nss_dns/dns-host.c:418:11
#9 0x7e80f305d711 in get_nss_addresses /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:652:17
#10 0x7e80f305d711 in gaih_inet /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:1185:17
#11 0x7e80f305d711 in getaddrinfo /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:2390:12
#12 0x569090cdb199 in getaddrinfo.part.0 asan_interceptors.cpp.o
#13 0x7e80f33d4461 in _D3std6socket18getAddressInfoImplFMAxaMQePS4core3sys5posix5netdb8addrinfoZASQCwQCv11AddressInfo (/usr/lib/libphobos2-ldc-shared.so.110+0x1d4461) (BuildId: 99b0a4bdd1c37b27fb8336d379aedecc33d04375)
#14 0x7e80f33d4b2d in _D3std6socket10getAddressFNfMAxaMQeZACQBkQBj7Address (/usr/lib/libphobos2-ldc-shared.so.110+0x1d4b2d) (BuildId: 99b0a4bdd1c37b27fb8336d379aedecc33d04375)
#15 0x569090bf62eb in _D4test4mainFZ2dgMFNfZv (/tmp/test-009e06+0x82eb) (BuildId: 8e3e05de8c6c55b75b2cd6406dd293a490acba44)
#16 0x7e80f3726642 in fiber_entryPoint (/usr/lib/libdruntime-ldc-shared.so.110+0xd7642) (BuildId: c4197bdbc13200c6ab1e7c45a0e639610fd85b3f)

SUMMARY: AddressSanitizer: stack-overflow /usr/src/debug/glibc/glibc/resolv/ns_samename.c:30:7 in __libc_ns_samename
==370888==ABORTING
Error: /tmp/test-009e06 failed with status: 1

Mar 11 '25 17:03 zorael

It seems to give the same error.

$ ASAN_OPTIONS=detect_stack_use_after_return=0 ldc -fsanitize=address -run test.d

Just to be sure, can you compile to a binary, and then run the binary?

$ ldc -fsanitize=address test.d -o test
$ ASAN_OPTIONS=detect_stack_use_after_return=0 test

Mar 11 '25 17:03 JohanEngelen

Sure:

$ ldc -fsanitize=address test.d
$ ASAN_OPTIONS=detect_stack_use_after_return=0 ./test
AddressSanitizer:DEADLYSIGNAL
=================================================================
==395979==ERROR: AddressSanitizer: stack-overflow on address 0x77a708855d48 (pc 0x77a70810bcd3 bp 0x77a708856590 sp 0x77a708855d50 T0)
#0 0x77a70810bcd3 in __libc_ns_samename /usr/src/debug/glibc/glibc/resolv/ns_samename.c:30:7
#1 0x77a70810edc4 in __libc_res_nameinquery /usr/src/debug/glibc/glibc/resolv/res_nameinquery.c:111:14
#2 0x77a70810eeef in __GI___libc_res_queriesmatch /usr/src/debug/glibc/glibc/resolv/res_queriesmatch.c:125:12
#3 0x77a70811192b in send_dg /usr/src/debug/glibc/glibc/resolv/res_send.c:1223:7
#4 0x77a708112433 in __res_context_send /usr/src/debug/glibc/glibc/resolv/res_send.c:373:8
#5 0x77a70810f163 in __res_context_query /usr/src/debug/glibc/glibc/resolv/res_query.c:218:10
#6 0x77a70810ff36 in __res_context_querydomain /usr/src/debug/glibc/glibc/resolv/res_query.c:629:9
#7 0x77a70810ff36 in __res_context_search /usr/src/debug/glibc/glibc/resolv/res_query.c:385:9
#8 0x77a708107c90 in __GI__nss_dns_gethostbyname4_r /usr/src/debug/glibc/glibc/resolv/nss_dns/dns-host.c:418:11
#9 0x77a708120711 in get_nss_addresses /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:652:17
#10 0x77a708120711 in gaih_inet /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:1185:17
#11 0x77a708120711 in getaddrinfo /usr/src/debug/glibc/glibc/nss/getaddrinfo.c:2390:12
#12 0x570073ee6199 in getaddrinfo.part.0 asan_interceptors.cpp.o
#13 0x77a7085d4461 in _D3std6socket18getAddressInfoImplFMAxaMQePS4core3sys5posix5netdb8addrinfoZASQCwQCv11AddressInfo (/usr/lib/libphobos2-ldc-shared.so.110+0x1d4461) (BuildId: 99b0a4bdd1c37b27fb8336d379aedecc33d04375)
#14 0x77a7085d4b2d in _D3std6socket10getAddressFNfMAxaMQeZACQBkQBj7Address (/usr/lib/libphobos2-ldc-shared.so.110+0x1d4b2d) (BuildId: 99b0a4bdd1c37b27fb8336d379aedecc33d04375)
#15 0x570073e012eb in _D4test4mainFZ2dgMFNfZv (/tmp/test+0x82eb) (BuildId: 8e3e05de8c6c55b75b2cd6406dd293a490acba44)
#16 0x77a70839a642 in fiber_entryPoint (/usr/lib/libdruntime-ldc-shared.so.110+0xd7642) (BuildId: c4197bdbc13200c6ab1e7c45a0e639610fd85b3f)

SUMMARY: AddressSanitizer: stack-overflow /usr/src/debug/glibc/glibc/resolv/ns_samename.c:30:7 in __libc_ns_samename
==395979==ABORTING

Mar 11 '25 17:03 zorael