Crash on free of temporary buffer s in zchko

[Pleune]

At

ckermit/ckufio.c

Line 2832 in cbe8041

if (s) free(s); /* Free temporary storage */

I'm trying to run this on a super constrained linux riscv/musl system and run into this. Interestingly on my x86-64 system, I don't get a crash. I ran out of time to do a proper root-cause... I will update if I figure out more at some point. For now I just know that the last debug log I get is the access ok above, and then segfault. If I comment out the free everything works great.

log from get asd.txt

<snip>
DECODE
zstrip before[d.txt]
zstrip after tilde=stripping[d.txt]
zstrip after[d.txt]
rcvfil cmarg2[]
rcvfil srvcmd 2[asd.txt]
zchko entry[asd.txt]
zchko setroot[]=0
zchko len[asd.txt]=7
zchko zchkod[asd.txt]=0
isdir entry[asd.txt]
isdir stat[asd.txt]=-1
isdir errno=2
zchko attempting to open[asd.txt]
zchko open mode[asd.txt]=2048
zchko open[asd.txt]=-1
zchko open errno=2
zchko i=-1
zchko itsadir=0
zchko access ok: [.] =0
<segfault>