Comment 0 for bug 1697501

ksh is segfaulting because it can't access struct "jp" ($rdx) thus cannot de-reference the struct member "jp>pid" ($rdx + 8) at line : src/cmd/ksh93/sh/jobs.c:1948 when looking if jp->pid is equal to pid ($edi) variable.

--
# gdb
[New LWP 3882]
Core was generated by `/bin/ksh <KSH_SCRIPT>.ksh'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 job_chksave (pid=pid@entry=19385) at /build/ksh-6IEHIC/ksh-93u+20120801/src/cmd/ksh93/sh/jobs.c:1948
1948 if(jp->pid==pid)

(gdb) p *jp
Cannot access memory at address 0xb

(gdb) p *jp->pid
Cannot access memory at address 0x13

(gdb) p pid
$2 = 19385

(gdb) p *jpold
$1 = {next = 0xb, pid = -604008960, exitval = 11124}

The struct is corrupted at some point looking at the next,pid and exitval struct members values which isn't valid data.

# assembly code
=> 0x0000000000427159 <+41>: cmp %edi,0x8(%rdx)

(gdb) p $edi ## pid variable
$1 = 19385

(gdb) p *($rdx + 8) ## jp->pid struct
Cannot access memory at address 0x13
--

I have looked the "att/ast" upstream repo and some patches here and there, and nothing seems to apply.

Note that the project seems unmaintained anymore.