Re: 2.6.13-rc2-almost-rc3, ext3 and memory corruption

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Petr Vandrovec wrote:
Petr Vandrovec wrote:

Hello,
  I was so happy that 2.6.13-rc3 was released that I tried to grab it,
and while I was doing that, box said:

Slab corruption: start=ffff8100005e5bf8, len=96
Redzone: 0x5a2cf071/0x5a2cf071.

Hello,
so I've enabled JBD-DEBUG, and unfortunately somebody corrupted inode instead of journal head this time :-( But corruption looks same - somebody wrote 32bit value 1 somewhere it should not... Does anybody have something like CONFIG_DEBUG_PAGE_ALLOC for x86-64?

Slab corruption: start=ffff8100005e7c00, len=976
Redzone: 0x5a2cf071/0x5a2cf071.

Still no clue, but somebody still writes 0x00000001 here and there around my inodes :-( This time when I was building 2.6.14-rc5 kernel... Apparently whenever my old kernel finds that it is going to be replaced it attempts to boycott build of new kernel.

Linux ppc 2.6.14-rc3-8298 #9 SMP PREEMPT Sun Oct 9 03:45:32 CEST 2005 x86_64 GNU/Linux

slab error in cache_free_debugcheck(): cache `size-64': double free, or memory outside object was overwritten

Call Trace:<ffffffff8017230a>{cache_free_debugcheck+378} <ffffffff8017376c>{kfree+220}
       <ffffffff801aaafe>{clear_inode+174} <ffffffff801aaba8>{dispose_list+104}
<ffffffff801aaffa>{prune_icache+426} <ffffffff801ab067>{shrink_icache_memory+23}
       <ffffffff80176185>{shrink_slab+229} <ffffffff801776bd>{balance_pgdat+589}
       <ffffffff80371474>{_spin_lock_irqsave+36} <ffffffff80177937>{kswapd+311}
<ffffffff80155070>{autoremove_wake_function+0} <ffffffff80155070>{autoremove_wake_function+0}
       <ffffffff801356dd>{schedule_tail+77} <ffffffff8010fd92>{child_rip+8}
       <ffffffff80177800>{kswapd+0} <ffffffff8010fd8a>{child_rip+0}

ffff8100005e7c38: redzone 1: 0x170fc2a5, redzone 2: 0x1.

									Petr

Box in question has single Athlon64 processor, runs SMP PREEMPT kernel
with almost all debugging options set (but not CONFIG_JBD_DEBUG). Box has 2GB of ECC RAM. Root filesystem is on pata disk connected to the pata port on Promise's 20378 (using sata_promise). Disk with git repository is plugged to pata port on Via's VT8237. Kernel's configuration is at http://platan.vc.cvut.cz/vana_at_home_config.txt, dmesg at http://platan.vc.cvut.cz/vana_at_home_dmesg.txt.


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