Hi! ----
Attached (as "astksh20130409_abort_crash1.sh.gz") is a testcase
(derived from a test in the "sh_match.sh" test module) which triggers
a memory-corruption-related crash in ast-ksh.2013-04-09 in 32bit debug
builds (64bit/AMD64 builds do not trigger the crash) on SuSE 12.3
Linux x86 when run with VMALLOC_OPTIONS=abort ...
Example:
-- snip --
$ VMALLOC_OPTIONS=abort ~/bin/ksh astksh20130409_abort_crash1.sh
9762 characters to process...
corrupted data:region=f772b028:block=f734b890:bad byte at=4096:
Aborted
-- snip --
The crash may happen sporadically... it seems it depends on memory
layout and on the order and way how the "xar" 2D array is being
filled.
The stack trace usually looks like this:
-- snip --
$ VMALLOC_OPTIONS=abort gdb --args ~/bin/ksh astksh20130409_abort_crash1.sh
GNU gdb (GDB) SUSE (7.5.1-2.1.1)
[snip]
(gdb) run
Starting program: /home/test001/bin/ksh astksh20130409_abort_crash1.sh
Detaching after fork from child process 2111.
9762 characters to process...
corrupted data:region=f7fc5028:block=f7c0d8c8:bad byte at=4096:
Program received signal SIGABRT, Aborted.
0xf7fda430 in __kernel_vsyscall ()
(gdb) where
#0 0xf7fda430 in __kernel_vsyscall ()
#1 0xf7de08cf in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#2 0xf7de21b3 in __GI_abort () at abort.c:90
#3 0x08161090 in vmdbwarn (vm=0xf7fc5028, mesg=0xffffa9f4 "corrupted
data:region=f7fc5028:block=f7c0d8c8:bad byte at=4096:\n", n=64)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/lib/libast/vmalloc/vmdebug.c:93
#4 0x081616f6 in dbwarn (vm=0xf7fc5028, data=0xf7c0d8c8, where=4096,
file=0x0, line=0, func=0x0, type=0)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/lib/libast/vmalloc/vmdebug.c:182
#5 0x081624c9 in vmdbcheck (vm=0xf7fc5028) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/lib/libast/vmalloc/vmdebug.c:607
#6 0x0815434c in _ast_malloc (size=141) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/lib/libast/vmalloc/malloc.c:518
#7 0x0809677c in nv_putval (np=0xf7d9c218,
string=0xf7c0e844 "<!-- Use the variablelist.term.separator and
the\n variablelist.term.break.after parameters to\n control
the term elements. -->", flags=0)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/name.c:1946
#8 0x08053f6c in nv_putv (np=0xf7d9c218,
value=0xf7c0e844 "<!-- Use the variablelist.term.separator and
the\n variablelist.term.break.after parameters to\n control
the term elements. -->", flags=0, nfp=0x0)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/nvdisc.c:157
#9 0x08060ca1 in array_putval (np=0xf7d9c218,
string=0xf7c0e844 "<!-- Use the variablelist.term.separator and
the\n variablelist.term.break.after parameters to\n control
the term elements. -->", flags=0,
dp=0xf7bec168) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/array.c:717
#10 0x08053f42 in nv_putv (np=0xf7d9c218,
value=0xf7c0e844 "<!-- Use the variablelist.term.separator and
the\n variablelist.term.break.after parameters to\n control
the term elements. -->", flags=0, nfp=0x0)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/nvdisc.c:152
#11 0x08095789 in nv_putval (np=0xf7d9c218,
string=0xf7c0e844 "<!-- Use the variablelist.term.separator and
the\n variablelist.term.break.after parameters to\n control
the term elements. -->", flags=0)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/name.c:1602
#12 0x08095527 in nv_open (
name=0xf7c0e7a8 "ar[i][j]=<!-- Use the variablelist.term.separator
and the\n variablelist.term.break.after parameters to\n
control the term elements. -->",
root=0xf7c16ed0, flags=131584) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/name.c:1532
#13 0x080928a9 in sh_setlist (shp=0x821b400 <sh>, arg=0xf7c15430,
flags=131584, typ=0x0) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/name.c:594
#14 0x080b6732 in sh_exec (shp=0x821b400 <sh>, t=0xf7c154a8, flags=4)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:1154
#15 0x080ba17f in sh_exec (shp=0x821b400 <sh>, t=0xf7c154cc, flags=4)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:2221
#16 0x080ba83c in sh_exec (shp=0x821b400 <sh>, t=0xf7c15320,
flags=516) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:2348
#17 0x080ba83c in sh_exec (shp=0x821b400 <sh>, t=0xf7c15294, flags=4)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:2348
#18 0x080ba0a4 in sh_exec (shp=0x821b400 <sh>, t=0xf7c15568, flags=6)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:2200
#19 0x080bf65d in sh_funscope_20120720 (shp=0x821b400 <sh>, argn=3,
argv=0xf7c119a0, fun=0x0, arg=0xffffcb04, execflg=4)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:4051
#20 0x080bdb90 in sh_funct (shp=0x821b400 <sh>, np=0xf7c156e8, argn=3,
argv=0xf7c119a0, envlist=0x0, execflg=4)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:3359
#21 0x080b7ee2 in sh_exec (shp=0x821b400 <sh>, t=0xf7dac8c0, flags=4)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/xec.c:1541
#22 0x0805341f in exfile (shp=0x821b400 <sh>, iop=0xf7da17c8, fno=11)
at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/main.c:588
#23 0x080527c6 in sh_main (ac=2, av=0xffffd3f4, userinit=0x0) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/main.c:360
#24 0x0805153b in main (argc=2, argv=0xffffd3f4) at
/home/test001/work/ast_ksh_20130409/build_i386_32bit_debug/src/cmd/ksh93/sh/pmain.c:45
-- snip --
----
Bye,
Roland
--
__ . . __
(o.\ \/ /.o) [email protected]
\__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer
/O /==\ O\ TEL +49 641 3992797
(;O/ \/ \O;)
astksh20130409_abort_crash1.sh.gz
Description: GNU Zip compressed data
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