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 for barebox@lists.infradead.org; Tue, 20 Nov 2012 21:57:26 +0000
From: Robert Jarzmik <robert.jarzmik@free.fr>
Date: Tue, 20 Nov 2012 22:57:15 +0100
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Subject: bmp splash memory corruption
To: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: barebox@lists.infradead.org

Hi Jean-Christophe,

I'm having another bmp memory corruption, could you have a look at this too :
(gdb) bt
#0  free (mem=0xa3026688) at common/dlmalloc.c:1362
#1  0xa3f242a4 in image_renderer_close (img=0xa2fa5228) at lib/gui/image_renderer.c:69
#2  0xa3f18ea0 in image_renderer_file (argc=2, argv=<value optimized out>) at include/gui/image_renderer.h:69
#3  do_splash (argc=2, argv=<value optimized out>) at commands/splash.c:70
#4  0xa3f05b2c in execute_command (argc=2, argv=0xa2fa4968) at common/command.c:77
#5  0xa3f01964 in run_pipe_real (ctx=0xa2effda8, pi=0xa2fa4288) at common/hush.c:790
#6  run_list_real (ctx=0xa2effda8, pi=0xa2fa4288) at common/hush.c:914
#7  0xa3f01bfc in run_list (ctx=0xa2effda8, inp=0xa2effd7c, flag=2) at common/hush.c:1033
#8  parse_stream_outer (ctx=0xa2effda8, inp=0xa2effd7c, flag=2) at common/hush.c:1618
#9  0xa3f01d80 in parse_string_outer (ctx=0xa2effda8, 
    s=0xa2f01890 "#!/bin/sh\n\nPATH=/env/bin\nexport PATH\n\n. /env/config\naddpart /dev/mtd0 $mtdparts\n\nusbserial -s \"Mio A701 usb gadget\"\nled keyboard 0\n\nsdcard_override\n\nfb0.enable=1\nsplash /dev/mtd0.barebox-logo\n\nmtd_env"..., flag=2) at common/hush.c:1662
#10 0xa3f01e24 in source_script (path=<value optimized out>, argc=<value optimized out>, argv=<value optimized out>) at common/hush.c:1815
#11 0xa3f01fdc in do_source (argc=2, argv=<value optimized out>) at common/hush.c:1877
#12 0xa3f05b2c in execute_command (argc=2, argv=0xa2f01708) at common/command.c:77
#13 0xa3f01964 in run_pipe_real (ctx=0xa2efff58, pi=0xa2f0ffc8) at common/hush.c:790
#14 run_list_real (ctx=0xa2efff58, pi=0xa2f0ffc8) at common/hush.c:914
#15 0xa3f01bfc in run_list (ctx=0xa2efff58, inp=0xa2efff2c, flag=2) at common/hush.c:1033
#16 parse_stream_outer (ctx=0xa2efff58, inp=0xa2efff2c, flag=2) at common/hush.c:1618
#17 0xa3f01d80 in parse_string_outer (ctx=0xa2efff58, s=0xa3f3477a "source /env/bin/init", flag=2) at common/hush.c:1662
#18 0xa3f01eb8 in run_command (cmd=0xa2f7b7fe "\377\377", flag=<value optimized out>) at common/hush.c:1783
#19 0xa3f07428 in start_barebox () at common/startup.c:124
#20 0xa3f33158 in board_init_lowlevel_return () at arch/arm/cpu/start.c:62

(gdb) p *p
$10 = {prev_size = 15, size = 2750562700, fd = 0xa3f24184, bk = 0xa3f23f24}
(gdb) p/x p->size
$11 = 0xa3f2418c
(gdb) p bmp_open
$12 = {struct image *(char *, int)} 0xa3f2418c <bmp_open>

As you can see here, p->size equals bmp_open(), while p is the
mem2chunk(mem). This _seems_ to imply that the memchunk headers were somehow
corrupted by bmp_open address ... hence my mail to see if that rings a bell to
you.

Cheers.

-- 
Robert

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