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Subject[OOPS 2.5.5-dj2] ext3 BUG in do_get_write_access()

I managed to generate the oops below on 2.5.5-dj2 by doing the following:
cp -ax / /mnt &
<some delay, don't know if it matters>
tune2fs -L root /dev/hdc5

/dev/hda7 on / type ext3 (rw,noatime,nodiratime)
/dev/hdc5 on /mnt type ext3 (rw,noatime,nodiratime)

tune2fs -L should be safe on a mounted filesystem, non?

A couple comments on the oops report: I didn't run it through ksymoops,
as I am confident that klogd had the correct file. Also, while
the oops says "Tainted: P", that is solely due to "modprobe: Warning:
loading /lib/modules/2.5.5-dj2/kernel/net/ipv4/netfilter/ipchains.o will
taint the kernel: non-GPL license - BSD without advertisement clause".

I'd be happy to provide further information if needed, for example the
ksymoops output if for some reason the klogd symbol translation is


Assertion failure in do_get_write_access() at transaction.c:586: "jh->b_next_transaction == ((void *)0)"
kernel BUG at transaction.c:586!
invalid operand: 0000
CPU: 0
EIP: 0010:[do_get_write_access+1626/1648] Tainted: P
EIP: 0010:[<c017128a>] Tainted: P
EFLAGS: 00010282
eax: 0000006c ebx: d8678cc0 ecx: ddfaf900 edx: df08ff7c
esi: d8678cc0 edi: df968cc0 ebp: df900bd0 esp: ddfe9e5c
ds: 0018 es: 0018 ss: 0018
Process cp (pid: 13610, threadinfo=ddfe8000 task=ddfaf900)
Stack: c0246dc0 c024b5ee c024b55c 0000024a c0248f60 df968d34 00000000 00000000
00000000 df6fa740 df968d34 df968cc0 defda3c0 df900bd0 c01712eb defda3c0
df900bd0 00000000 defda3c0 00000000 00004b80 d89205c0 c0166376 defda3c0
Call Trace: [journal_get_write_access+75/128] [ext3_new_inode+1078/2496] [start_this_handle+126/336] [__jbd_kmalloc+35/112] [ext3_mkdir+245/1072]
Call Trace: [<c01712eb>] [<c0166376>] [<c017051e>] [<c0177893>] [<c016beb5>]
[ext3_lookup+185/304] [vfs_mkdir+120/192] [sys_mkdir+218/256] [syscall_call+7/11]
[<c016b329>] [<c014aa18>] [<c014ab3a>] [<c0108eff>]

Code: 0f 0b 4a 02 5c b5 24 c0 e9 e3 fe ff ff 8b 5d 00 e9 dd f9 ff

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