Bug#716252: maildrop: reformime: null pointer dereference in extract_section()

Hi,

I just uploaded maildrop 2.9.3 to Debian. Thanks for many upstream
fixes.

I'm forwarding another bug report from the Debian bug tracking system
(If you already dealt with this, sorry, missed it the last time around):

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=716252

---
 From: Jakub Wilk <[email protected]>
 To: [email protected]
 Subject: Re: Bug#716252: [Mayhem] Bug report on courier-maildrop: reformime crashes with exit status 139
 Date: Thu, 5 Oct 2017 18:12:44 +0200

Minimal reproducer:

  $ reformime -x -s moo < /dev/null
  Segmentation fault

GDB says it's a null pointer dereference:

Program received signal SIGSEGV, Segmentation fault.
extract_section (top_rfcp=0x0, mimesection=0x565749b8 "moo", extract_filename=0x0, argc=0, argv=0xffffd584, extract_func=0x565587d0 <extract_file>) at reformime.c:656
656			if (top_rfcp->firstpart)
(gdb) print top_rfcp
$1 = (struct rfc2045 *) 0x0
(gdb) bt
#0  extract_section (top_rfcp=0x0, mimesection=0x565749b8 "moo", extract_filename=0x0, argc=0, argv=0xffffd584, extract_func=0x565587d0 <extract_file>) at reformime.c:656
#1  0x56556ee5 in main2 (argv=<optimized out>, argc=<optimized out>, mimecharset=<optimized out>) at reformime.c:1181
#2  main (argc=<optimized out>, argv=<optimized out>) at reformime.c:1226

-- 
Jakub Wilk

---

I still see the problem in 2.9.3

Regards,

Osamu


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