From: Tanaka Akira <akr@...17n.org>
Date: 2004-12-17T00:00:00+09:00
Subject: [ruby-dev:25226] Zlib::Deflate.deflate dumps core

次のようにすると core を吐きます。

% catchsegv ./ruby -rzlib -ve '
src = Object.new
class << src; self end.send(:define_method, :to_str) {
  callcc {|k| $k = k }
  "abc"
}
p Zlib::Deflate.deflate(src)
$k.call
'
ruby 1.9.0 (2004-12-16) [i686-linux]
"x\234KLJ\006\000\002M\001'"
*** Segmentation fault
Register dump:

 EAX: 00000400   EBX: 40202288   ECX: 00000100   EDX: 08148ad8
 ESI: 30305c30   EDI: 08148ad8   EBP: bfffe748   ESP: bfffe740

 EIP: 400f0a1f   EFLAGS: 00010206

 CS: 0023   DS: 002b   ES: 002b   FS: 0000   GS: 0000   SS: 002b

 Trap: 0000000e   Error: 00000004   OldMask: 00000000
 ESP/signal: bfffe740   CR2: 30305c30

 FPUCW: ffff037f   FPUSW: ffff0020   TAG: ffffffff
 IPOFF: 0806959b   CSSEL: 0023   DATAOFF: 0818832c   DATASEL: 002b

 ST(0) 0000 0000000000000000   ST(1) 0000 0000000000000000
 ST(2) 0000 0000000000000000   ST(3) 0000 0000000000000000
 ST(4) 0000 0000000000000000   ST(5) 0000 0000000000000000
 ST(6) 0000 0000000000000000   ST(7) 0000 0000000000000000

Backtrace:
/lib/libc.so.6(memcpy+0x2f)[0x400f0a1f]
/usr/lib/libz.so.1(deflate+0x3e5)[0x401f58e5]
/home/akr/ruby/head-ruby/lib/ruby/1.9/i686-linux/zlib.so[0x401dfae3]
/home/akr/ruby/head-ruby/lib/ruby/1.9/i686-linux/zlib.so[0x401e0703]
/home/akr/ruby/head-ruby/ruby/eval.c:5418(call_cfunc)[0x806ac5a]
/home/akr/ruby/head-ruby/ruby/eval.c:5559(rb_call0)[0x805ea12]
/home/akr/ruby/head-ruby/ruby/eval.c:5782(rb_call)[0x805ecd8]
/home/akr/ruby/head-ruby/ruby/ruby.h:635(rb_eval)[0x80597fa]
/home/akr/ruby/head-ruby/ruby/ruby.h:664(rb_eval)[0x8059b2b]
/home/akr/ruby/head-ruby/ruby/eval.c:1470(ruby_exec_internal)[0x8055dcd]
./ruby(ruby_exec+0x16)[0x8055de6]
./ruby(ruby_run+0x20)[0x8055e30]
??:0(main)[0x8053e35]
/lib/libc.so.6(__libc_start_main+0xc6)[0x4008edc6]
../sysdeps/i386/elf/start.S:105(_start)[0x8053d61]

Memory map:

08048000-080fc000 r-xp 00000000 03:01 3598430 /home/akr/ruby/head-ruby/ruby/ruby
080fc000-080ff000 rw-p 000b3000 03:01 3598430 /home/akr/ruby/head-ruby/ruby/ruby
080ff000-081a9000 rwxp 00000000 00:00 0
40000000-40016000 r-xp 00000000 03:01 165729 /lib/ld-2.3.2.so
40016000-40017000 rw-p 00015000 03:01 165729 /lib/ld-2.3.2.so
40017000-40018000 rw-p 00000000 00:00 0
40018000-4001b000 r-xp 00000000 03:01 166424 /lib/libSegFault.so
4001b000-4001c000 rw-p 00002000 03:01 166424 /lib/libSegFault.so
4001c000-4001d000 rw-p 00000000 00:00 0
40026000-40028000 r-xp 00000000 03:01 166367 /lib/libdl-2.3.2.so
40028000-40029000 rw-p 00002000 03:01 166367 /lib/libdl-2.3.2.so
40029000-4002e000 r-xp 00000000 03:01 166366 /lib/libcrypt-2.3.2.so
4002e000-4002f000 rw-p 00004000 03:01 166366 /lib/libcrypt-2.3.2.so
4002f000-40057000 rw-p 00000000 00:00 0
40057000-40078000 r-xp 00000000 03:01 166368 /lib/libm-2.3.2.so
40078000-40079000 rw-p 00020000 03:01 166368 /lib/libm-2.3.2.so
40079000-401a1000 r-xp 00000000 03:01 166365 /lib/libc-2.3.2.so
401a1000-401a9000 rw-p 00127000 03:01 166365 /lib/libc-2.3.2.so
401a9000-401dd000 rw-p 00000000 00:00 0
401dd000-401e6000 r-xp 00000000 03:01 231894 /home/akr/ruby/head-ruby/lib/ruby/1.9/i686-linux/zlib.so
401e6000-401e7000 rw-p 00008000 03:01 231894 /home/akr/ruby/head-ruby/lib/ruby/1.9/i686-linux/zlib.so
401f1000-40202000 r-xp 00000000 03:01 997563 /usr/lib/libz.so.1.2.2
40202000-40203000 rw-p 00010000 03:01 997563 /usr/lib/libz.so.1.2.2
bfffc000-c0000000 rwxp ffffd000 00:00 0
-- 
[田中 哲][たなか あきら][Tanaka Akira]