[2.5.43] Bug on Alpha: 'Trying to free free buffer'

[Jan-Benedict Glaw]

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Hi!

Reading/writing from/to an ext3 filesystem causes some BUG() which asks
for being reported. The box is a NoName (aka AXPpci33), 128MB RAM, some
SCSI HDDs on a 'LSI Logic / Symbios Logic (formerly NCR) 53c810 (rev 01)'.
Here's the ksymoopsed dmesg:

VFS: brelse: Trying to free free buffer
buffer layer error at fs/buffer.c:1164
Pass this trace through ksymoops for reporting

ksymoops 2.4.6 on alpha 2.5.43.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.5.43/ (default)
     -m /boot/System.map-2.5.43--00 (specified)

Warning (compare_maps): ksyms_base symbol __start___kallsyms not found in S=
ystem.map.  Ignoring ksyms_base entry
Warning (compare_maps): ksyms_base symbol __stop___kallsyms not found in Sy=
stem.map.  Ignoring ksyms_base entry
depmod(41): unaligned trap at 000000012000e750: 00000001201349ac 29 1
depmod(41): unaligned trap at 000000012000e758: 00000001201349ac 2d 1
depmod(41): unaligned trap at 000000012000e750: 0000000120147a84 29 1
depmod(41): unaligned trap at 000000012000e758: 0000000120147a84 2d 1
modprobe(94): unaligned trap at 0000000120011750: 000000012005db24 29 1
modprobe(94): unaligned trap at 0000000120011758: 000000012005db24 2d 1
3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
fffffc0003b3bc68 0000000000000000 fffffc0000860984 0000000000000003=20
       fffffc0000862630 fffffc0003b3bd14 fffffc00008b32c0 fffffc00031decc0=
=20
       fffffc00008b3648 fffffc0004b9b000 fffffc00008aafe0 fffffc00034bbb20=
=20
       fffffc0000eeb6a0 fffffc00027180f8 fffffc0000876c60 fffffc0003b3bee8=
=20
       fffffc0000876c60 000000011ffff450 21a6d5f53639d8ba fffffc0000000002=
=20
       fffffc0007ee8b50 fffffffe00000002 fffffc0000eeb6a0 000000002f0e092c=
=20
Trace:fffffc0000860984 fffffc0000862630 fffffc00008b32c0 fffffc00008b3648 f=
ffffc00008aafe0 fffffc0000876c60 fffffc0000876c60 fffffc00008aa4fc fffffc00=
00876778 fffffc0000876c60 fffffc0000870890 fffffc000086ecd8 fffffc000087111=
8 fffffc0000871848 fffffc0000832b98 fffffc0000876c60 fffffc0000876ec8 fffff=
c0000810c84 fffffc0000810c98 fffffc0000810be0=20
fffffc0006977a38 0000000000000000 fffffc0000860984 0000000000000003=20
       fffffc0000862630 0000000000000001 fffffc000086295c fffffc0000aef500=
=20
       fffffc0000862a9c fffffc0000aef500 fffffc0000336380 000000000006028e=
=20
       0000000000001000 fffffc0001c6cc78 fffffc0006977c68 0000000000000000=
=20
       fffffc0000aef500 fffffc000283e660 fffffc0005da6ba0 fffffc0000aefe60=
=20
       fffffc0002b0b620 fffffc000326ff80 fffffc0004edb020 fffffc0003fc2de0=
=20
Trace:fffffc0000860984 fffffc0000862630 fffffc000086295c fffffc0000862a9c f=
ffffc0000862af0 fffffc00008ae4d0 fffffc00008b3c0c fffffc00008be830 fffffc00=
008b422c fffffc00008b1a40 fffffc00008b1ad4 fffffc000086efcc fffffc000086f55=
0 fffffc000086ffe0 fffffc0000870890 fffffc0000870b0c fffffc0000870b30 fffff=
c000086a5ec fffffc000086a860 fffffc000086ede4 fffffc0000810c84 fffffc000085=
e328 fffffc0000810be0=20
fffffc0003b3bc68 0000000000000000 fffffc0000860984 0000000000000003=20
       fffffc0000862630 fffffc0003b3bd14 fffffc00008b32c0 fffffc0003198c00=
=20
       fffffc00008b3648 fffffc00031a5000 fffffc00008aafe0 fffffc0006c1aae0=
=20
       fffffc0006f01e40 fffffc00043583d8 fffffc0000876c60 fffffc0003b3bee8=
=20
       fffffc0000876c60 000000011ffff450 ca11e44355ff522e fffffc0000000002=
=20
       fffffc0007ee8b50 fffffffe00000002 fffffc0006f01e40 00000000530dbb22=
=20
Trace:fffffc0000860984 fffffc0000862630 fffffc00008b32c0 fffffc00008b3648 f=
ffffc00008aafe0 fffffc0000876c60 fffffc0000876c60 fffffc00008aa4fc fffffc00=
00876778 fffffc0000876c60 fffffc0000870890 fffffc000086eb9c fffffc000086ecd=
8 fffffc0000871118 fffffc0000871848 fffffc0000832b98 fffffc0000876c60 fffff=
c0000876ec8 fffffc0000810c84 fffffc0000810c98 fffffc0000810be0=20
Warning (Oops_read): Code line not seen, dumping what data is available

Trace; fffffc0000860984 <__buffer_error+64/80>
Trace; fffffc0000862630 <__brelse+50/60>
Trace; fffffc00008b32c0 <dx_release+60/80>
Trace; fffffc00008b3648 <ext3_htree_fill_tree+1e8/240>
Trace; fffffc00008aafe0 <ext3_dx_readdir+1a0/200>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc00008aa4fc <ext3_readdir+7c/500>
Trace; fffffc0000876778 <vfs_readdir+d8/160>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc0000870890 <path_lookup+150/180>
Trace; fffffc000086ecd8 <permission+58/a0>
Trace; fffffc0000871118 <may_open+98/380>
Trace; fffffc0000871848 <open_namei+448/660>
Trace; fffffc0000832b98 <update_process_times+58/80>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc0000876ec8 <sys_getdents64+68/120>
Trace; fffffc0000810c84 <entSys+a4/b8>
Trace; fffffc0000810c98 <ret_from_sys_call+0/10>
Trace; fffffc0000810be0 <entSys+0/b8>
Trace; fffffc0000860984 <__buffer_error+64/80>
Trace; fffffc0000862630 <__brelse+50/60>
Trace; fffffc000086295c <bh_lru_install+19c/1e0>
Trace; fffffc0000862a9c <__find_get_block+fc/120>
Trace; fffffc0000862af0 <__getblk+30/80>
Trace; fffffc00008ae4d0 <ext3_getblk+f0/380>
Trace; fffffc00008b3c0c <ext3_find_entry+18c/4e0>
Trace; fffffc00008be830 <do_get_write_access+6f0/740>
Trace; fffffc00008b422c <ext3_lookup+4c/160>
Trace; fffffc00008b1a40 <ext3_do_update_inode+4a0/5a0>
Trace; fffffc00008b1ad4 <ext3_do_update_inode+534/5a0>
Trace; fffffc000086efcc <real_lookup+cc/240>
Trace; fffffc000086f550 <do_lookup+130/360>
Trace; fffffc000086ffe0 <link_path_walk+860/da0>
Trace; fffffc0000870890 <path_lookup+150/180>
Trace; fffffc0000870b0c <__user_walk+2c/a0>
Trace; fffffc0000870b30 <__user_walk+50/a0>
Trace; fffffc000086a5ec <vfs_lstat+2c/80>
Trace; fffffc000086a860 <sys_newlstat+20/40>
Trace; fffffc000086ede4 <path_release+24/80>
Trace; fffffc0000810c84 <entSys+a4/b8>
Trace; fffffc000085e328 <sys_close+a8/e0>
Trace; fffffc0000810be0 <entSys+0/b8>
Trace; fffffc0000860984 <__buffer_error+64/80>
Trace; fffffc0000862630 <__brelse+50/60>
Trace; fffffc00008b32c0 <dx_release+60/80>
Trace; fffffc00008b3648 <ext3_htree_fill_tree+1e8/240>
Trace; fffffc00008aafe0 <ext3_dx_readdir+1a0/200>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc00008aa4fc <ext3_readdir+7c/500>
Trace; fffffc0000876778 <vfs_readdir+d8/160>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc0000870890 <path_lookup+150/180>
Trace; fffffc000086eb9c <vfs_permission+dc/1c0>
Trace; fffffc000086ecd8 <permission+58/a0>
Trace; fffffc0000871118 <may_open+98/380>
Trace; fffffc0000871848 <open_namei+448/660>
Trace; fffffc0000832b98 <update_process_times+58/80>
Trace; fffffc0000876c60 <filldir64+0/200>
Trace; fffffc0000876ec8 <sys_getdents64+68/120>
Trace; fffffc0000810c84 <entSys+a4/b8>
Trace; fffffc0000810c98 <ret_from_sys_call+0/10>
Trace; fffffc0000810be0 <entSys+0/b8>

3 warnings issued.  Results may not be reliable.
MfG, JBG

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Jan-Benedict Glaw   .   [e-mail]   .   [phone]
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