fatal error: failed to parse kernel version from uname

colorcodingmonkey · June 23, 2026, 2:51am

Currently running v2.0.14, linux 32bit. When I upgrade to 2.1.x

I get an error to parse kernel version from uname.

fatal error: failed to parse kernel version from uname runtime: panic before malloc heap initialized runtime stack: runtime stack: runtime.throwruntime.throw(({{0x2463680x246368, , 0x290x29}}) ) runtime/panic.goruntime/panic.go::12291229 + +0x350x35 fp= fp=0xbfab9b0c0xbfab9b0c sp= sp=0xbfab9af80xbfab9af8 pc= pc=0xd45eb50xd45eb5 runtime.getKernelVersionruntime.getKernelVersion(() ) runtime/os_linux.goruntime/os_linux.go::956956 + +0xe40xe4 fp= fp=0xbfab9cc40xbfab9cc4 sp= sp=0xbfab9b0c0xbfab9b0c pc= pc=0xd087040xd08704 runtime.configure64bitsTimeOn32BitsArchitecturesruntime.configure64bitsTimeOn32BitsArchitectures((…) ) runtime/os_linux32.goruntime/os_linux32.go::1414 runtime.osinitruntime.osinit(() ) runtime/os_linux.goruntime/os_linux.go::357357 + +0x370x37 fp= fp=0xbfab9cd00xbfab9cd0 sp= sp=0xbfab9cc40xbfab9cc4 pc= pc=0xd079e70xd079e7 runtime.rt0_goruntime.rt0_go(() ) runtime/asm_386.sruntime/asm_386.s::242242 + +0x15c0x15c fp= fp=0xbfab9cd40xbfab9cd4 sp= sp=0xbfab9cd00xbfab9cd0 pc= pc=0xd4b74c0xd4b74c

uname -a Linux N7700 2.6.33N7700 #5 SMP Tue May 3 17:37:03 CST 2011 i686 unknown

calmh · June 23, 2026, 4:53am

Looks like this Go bug, so presumably fixed in a future Syncthing release built by a future Go.

github.com/golang/go

runtime: version parsing fails

opened 03:48AM - 22 May 26 UTC

closed 02:23AM - 22 Jun 26 UTC

bradfitz

compiler/runtime FixPending

To debug a customer issue, I bought an old Synology NVR216 off Ebay. I figured t…he issue was going to be about it having ARMv7 but softfloat. Instead, it was about this: ``` ash-4.3# uname -a Linux nvr216 3.4.35_hi3535 #25556 SMP Tue May 2 17:16:55 CST 2023 armv7l GNU/Linux synology_hi3535_nvr216 ash-4.3# /var/packages/Tailscale/target/bin/tailscaled -h fatal error: failed to parse kernel version from uname runtime: panic before malloc heap initialized runtime stack: runtime stack: runtime.throwruntime.throw(({{0xe038990xe03899, , 0x290x29}}) ) runtime/panic.goruntime/panic.go::12291229 + +0x340x34 fp= fp=0xbefedb3c0xbefedb3c sp= sp=0xbefedb280xbefedb28 pc= pc=0xb0e7c0xb0e7c runtime.getKernelVersionruntime.getKernelVersion(() ) runtime/os_linux.goruntime/os_linux.go::956956 + +0xc40xc4 fp= fp=0xbefedcf40xbefedcf4 sp= sp=0xbefedb3c0xbefedb3c pc= pc=0x6afb00x6afb0 runtime.configure64bitsTimeOn32BitsArchitecturesruntime.configure64bitsTimeOn32BitsArchitectures((......) ) runtime/os_linux32.goruntime/os_linux32.go::1414 runtime.osinitruntime.osinit(() ) runtime/os_linux.goruntime/os_linux.go::357357 + +0x380x38 fp= fp=0xbefedd000xbefedd00 sp= sp=0xbefedcf40xbefedcf4 pc= pc=0x6a30c0x6a30c runtime.rt0_goruntime.rt0_go(() ) runtime/asm_arm.sruntime/asm_arm.s::167167 + +0x780x78 fp= fp=0xbefedd400xbefedd40 sp= sp=0xbefedd000xbefedd00 pc= pc=0xb6b180xb6b18 ``` I'll send a fix.

bt90 · June 23, 2026, 6:03am

If all those reports have thaught me anything: I won’t recommend or buy Synology devices. Those frankenstein Kernels are something else.

calmh · June 23, 2026, 6:10am

I don’t disagree, though in this specific case it seems the problem is naiveté in the Go kernel version parser. (Which is only needed because the problems you allude to, though.)