runtime: crash on AIX

[dsabelli352]

Go version

golang 1.25.1

Output of go env in your module/workspace:

Fri Sep 19 19:31:48 IST 2025 checkCertificates: running certman command, SECUREWRAP_CMDPATH = /var/opt/HCL/Installer_aix/HWA_10.2.5_AIX_AGENT/TWS/AIX/Tivoli_LWA_AIX/TWS/bin
runtime: memory allocated by OS [0x700000048000000, 0x70000004c000000) not in usable address space: base outside usable address space
fatal error: memory reservation exceeds address space limit

runtime stack:
runtime.throw({0x10033b148?, 0x4000000?})
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/panic.go:1094 +0x34 fp=0xfffffffffffda60 sp=0xfffffffffffda20 pc=0x100081594
runtime.(*mheap).sysAlloc(0x110062fc0, 0x100033cb8?, 0x110073208, 0x110073230)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/malloc.go:748 +0x704 fp=0xfffffffffffdb28 sp=0xfffffffffffda60 pc=0x100015ac4
runtime.(*mheap).grow(0x110062fc0, 0x9000000002504ec?)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1566 +0xb8 fp=0xfffffffffffdbc8 sp=0xfffffffffffdb28 pc=0x100034688
runtime.(*mheap).allocSpan(0x110062fc0, 0x1, 0x0, 0x10)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1299 +0x1e4 fp=0xfffffffffffdc78 sp=0xfffffffffffdbc8 pc=0x100033d04
runtime.(*mheap).alloc.func1()
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1017 +0x88 fp=0xfffffffffffdcd0 sp=0xfffffffffffdc78 pc=0x1000336c8
runtime.systemstack(0xfffffffffffdd20)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/asm_ppc64x.s:280 +0xa4 fp=0xfffffffffffdcf0 sp=0xfffffffffffdcd0 pc=0x1000866b4
Fri Sep 19 19:31:49 IST 2025 checkCertificates: error in /var/opt/HCL/Installer_aix/HWA_10.2.5_AIX_AGENT/TWS/AIX/Tivoli_LWA_AIX/TWS/bin/securewrap -cmd crt -args verify -inpath /var/opt/HCL/Installer_aix/certs -keypasswd xxxxxxxx
root@HBSAODRDB1:/var/opt/HCL/HWA/TWSDATA/installation/logs$"

What did you do?

Team,

we need to report this crash on AIX for latest version of golang (it happens also with previous one)

(not able to reproduce on other machine AIX)

ENV:

golang build
[echoproperties] go.version=1.25.1
[echoproperties] golangarch=aix_ppc64
[echoproperties] golangarchext=
[echoproperties] guice.disable.misplaced.annotation.check=true
[echoproperties] http.keepAlive=false
[echoproperties] ibm.signalhandling.rs=false
[echoproperties] ibm.signalhandling.sigchain=true
[echoproperties] ibm.signalhandling.sigint=true
[echoproperties] ibm.system.encoding=UTF-8

AIX machine:

root@HBSAODRDB1:/root$ svmon -G
size inuse free pin virtual mmode
memory 67108864 64513899 2594965 15103414 22285269 Ded
pg space 25165824 58402

           work        pers        clnt       other

pin 12994735 0 4647 2104032
in use 22285269 0 42228630

PageSize PoolSize inuse pgsp pin virtual
s 4 KB - 49329499 58402 5857270 7100869
m 64 KB - 949025 0 577884 949025
L 16 MB - 0 0 0 0
S 16 GB - 0 0 0 0
root@HBSAODRDB1:/root$ ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) 4194304
memory(kbytes) unlimited
coredump(blocks) 0
nofiles(descriptors) unlimited
threads(per process) unlimited
processes(per user) 16384
root@HBSAODRDB1:/root$ getconf KERNEL_BITMODE
64

root@HBSAODRDB1:/root$ oslevel -s
7300-03-00-2446
root@HBSAODRDB1:/root$ oslevel -r
7300-02

CRASH:

...
Fri Sep 19 19:31:48 IST 2025 checkCertificates: running certman command, SECUREWRAP_CMDPATH = /var/opt/HCL/Installer_aix/HWA_10.2.5_AIX_AGENT/TWS/AIX/Tivoli_LWA_AIX/TWS/bin
runtime: memory allocated by OS [0x700000048000000, 0x70000004c000000) not in usable address space: base outside usable address space
fatal error: memory reservation exceeds address space limit

runtime stack:
runtime.throw({0x10033b148?, 0x4000000?})
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/panic.go:1094 +0x34 fp=0xfffffffffffda60 sp=0xfffffffffffda20 pc=0x100081594
runtime.(*mheap).sysAlloc(0x110062fc0, 0x100033cb8?, 0x110073208, 0x110073230)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/malloc.go:748 +0x704 fp=0xfffffffffffdb28 sp=0xfffffffffffda60 pc=0x100015ac4
runtime.(*mheap).grow(0x110062fc0, 0x9000000002504ec?)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1566 +0xb8 fp=0xfffffffffffdbc8 sp=0xfffffffffffdb28 pc=0x100034688
runtime.(*mheap).allocSpan(0x110062fc0, 0x1, 0x0, 0x10)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1299 +0x1e4 fp=0xfffffffffffdc78 sp=0xfffffffffffdbc8 pc=0x100033d04
runtime.(*mheap).alloc.func1()
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1017 +0x88 fp=0xfffffffffffdcd0 sp=0xfffffffffffdc78 pc=0x1000336c8
runtime.systemstack(0xfffffffffffdd20)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/asm_ppc64x.s:280 +0xa4 fp=0xfffffffffffdcf0 sp=0xfffffffffffdcd0 pc=0x1000866b4
Fri Sep 19 19:31:49 IST 2025 checkCertificates: error in /var/opt/HCL/Installer_aix/HWA_10.2.5_AIX_AGENT/TWS/AIX/Tivoli_LWA_AIX/TWS/bin/securewrap -cmd crt -args verify -inpath /var/opt/HCL/Installer_aix/certs -keypasswd xxxxxxxx
root@HBSAODRDB1:/var/opt/HCL/HWA/TWSDATA/installation/logs$"

What did you see happen?

See the description...
Fri Sep 19 19:31:48 IST 2025 checkCertificates: running certman command, SECUREWRAP_CMDPATH = /var/opt/HCL/Installer_aix/HWA_10.2.5_AIX_AGENT/TWS/AIX/Tivoli_LWA_AIX/TWS/bin
runtime: memory allocated by OS [0x700000048000000, 0x70000004c000000) not in usable address space: base outside usable address space
fatal error: memory reservation exceeds address space limit

runtime stack:
runtime.throw({0x10033b148?, 0x4000000?})
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/panic.go:1094 +0x34 fp=0xfffffffffffda60 sp=0xfffffffffffda20 pc=0x100081594
runtime.(*mheap).sysAlloc(0x110062fc0, 0x100033cb8?, 0x110073208, 0x110073230)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/malloc.go:748 +0x704 fp=0xfffffffffffdb28 sp=0xfffffffffffda60 pc=0x100015ac4
runtime.(*mheap).grow(0x110062fc0, 0x9000000002504ec?)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1566 +0xb8 fp=0xfffffffffffdbc8 sp=0xfffffffffffdb28 pc=0x100034688
runtime.(*mheap).allocSpan(0x110062fc0, 0x1, 0x0, 0x10)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1299 +0x1e4 fp=0xfffffffffffdc78 sp=0xfffffffffffdbc8 pc=0x100033d04
runtime.(*mheap).alloc.func1()
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/mheap.go:1017 +0x88 fp=0xfffffffffffdcd0 sp=0xfffffffffffdc78 pc=0x1000336c8
runtime.systemstack(0xfffffffffffdd20)
/tivoli/tools/maestro_tools/Golang_1.25.1/src/runtime/asm_ppc64x.s:280 +0xa4 fp=0xfffffffffffdcf0 sp=0xfffffffffffdcd0 pc=0x1000866b4
Fri Sep 19 19:31:49 IST 2025 checkCertificates: error in /var/opt/HCL/Installer_aix/HWA_10.2.5_AIX_AGENT/TWS/AIX/Tivoli_LWA_AIX/TWS/bin/securewrap -cmd crt -args verify -inpath /var/opt/HCL/Installer_aix/certs -keypasswd xxxxxxxx
root@HBSAODRDB1:/var/opt/HCL/HWA/TWSDATA/installation/logs$"

What did you expect to see?

no core

[gabyhelp]

Related Issues

• runtime: AIX build broken with SIGSEGV #70483 (closed)
• runtime: report "out of memory" if Solaris mmap fails with EAGAIN #14930 (closed)
• runtime: /usr/local/go/src/runtime/mpagealloc.go:496 index out of range #73671 (closed)
• gccgo: runtime address space conflict on AIX #24994 (closed)
• fatal error: out of memory #13728 (closed)
• runtime: AIX build broken with fatal error 'taggedPointerPack invalid packing' #73515 (closed)
• runtime: fatal error: index out of range #73646 (closed)
• runtime, cmd/compile: SIGILL during fixedbugs/issue11656.go on aix-ppc64 #44583 (closed)
• runtime: `cannot allocate memory` testing `x/sys/unix` on linux-386-stretch #52576 (closed)
• affected/package: go #51523 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[JunyangShao]

@golang/runtime

[randall77]

@golang/aix

[ayappanec]

@dsabelli352 You mentioned it is not reproducible in another machine. So, Is there any specific memory settings done in the machine where this problem is seen? ( like LDR_CNTRL)

[dsabelli352]

@ayappanec it seems that it impact the 32 bit..as I said this is 64bit machine and we compile 64bit I will check on customer machine the value

[dsabelli352]

@ayappanec I asked them to run print LDR_CNTRL and it did not return anything that means I guess that it is not set.. Which is next step?