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    SubjectRe: ReiserFS 4 BUG
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    Date
    Hello

    On Thu, 2004-12-02 at 02:33, Ruben Fonseca wrote:
    > happen with 2.6.10-rc2-mm2 and mm3 (and maybe latter, but didn't notive this)
    >
    > when installing PHP or OpenOffice, the instalation break and kernel says:
    >
    > ------------[ cut here ]------------
    > kernel BUG at fs/reiser4/plugin/file/tail_conversion.c:58!

    Please try with the attached patch.

    > invalid operand: 0000 [#1]
    > PREEMPT
    > Modules linked in: ipw2100 ieee80211 ieee80211_crypt eth1394 ohci_hcd
    > parport_pc parport ohci1394 ieee1394 ehci_hcd uhci_hcd joydev evdev
    > snd_pcm_oss snd_mixer_oss snd_seq_oss snd_seq_midi_event snd_seq
    > snd_seq_device nls_iso8859_1 ntfs snd_intel8x0 snd_ac97_codec snd_pcm
    > snd_timer snd snd_page_alloc
    > CPU: 0
    > EIP: 0060:[<c022e438>] Not tainted VLI
    > EFLAGS: 00010282 (2.6.10-rc2-mm3)
    > EIP is at get_nonexclusive_access+0x28/0x40
    > eax: c390df1c ebx: cc106d30 ecx: d67c2340 edx: cc106cd8
    > esi: cc106d00 edi: cc106cd8 ebp: d673c5f4 esp: c390dc7c
    > ds: 007b es: 007b ss: 0068
    > Process setup.bin (pid: 15101, threadinfo=c390c000 task=d5fb3540)
    > Stack: c022cff7 cc106cd8 d7076800 00000000 00000000 00000000 00000000 00000000
    > 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    > 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    > Call Trace:
    > [<c022cff7>] unix_file_filemap_nopage+0x67/0xd0
    > [<c022cf90>] unix_file_filemap_nopage+0x0/0xd0
    > [<c014fc77>] do_no_page+0xd7/0x3a0
    > [<c0150241>] handle_mm_fault+0x1d1/0x210
    > [<c014e3e5>] follow_page+0x25/0x30
    > [<c014e59a>] get_user_pages+0x16a/0x3e0
    > [<c022c466>] reiser4_get_user_pages+0x96/0xc0
    > [<c022d570>] write_unix_file+0x300/0x450
    > [<c01e29f5>] init_context+0x75/0xc0
    > [<c01fcc2f>] reiser4_write+0x8f/0x100
    > [<c0160e5a>] vfs_write+0x13a/0x180
    > [<c0161f49>] fget_light+0x89/0xa0
    > [<c0160f71>] sys_write+0x51/0x80
    > [<c01032c1>] sysenter_past_esp+0x52/0x71
    > Code: 00 00 00 b8 00 e0 ff ff 21 e0 8b 00 8b 54 24 04 8b 80 b8 04 00
    > 00 8b 40 3c 8b 48 08 85 c9 75 0b 89 d0 ff 00 0f 88 8b 12 00 00 c3 <0f>
    > 0b 3a 00 38 f7 41 c0 eb eb 8d b4 26 00 00 00 00 8d bc 27 00
    >
    > after that the system becomes unusable.. have to reboot....
    >
    > no data damaged, but can't install those applications :(
    > -
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    >
    # This is a BitKeeper generated diff -Nru style patch.
    #
    # ChangeSet
    # 2004/11/23 14:07:34+03:00 vs@tribesman.namesys.com
    # read_unix_file: missing calls to txn_restart() are added
    #
    # plugin/file/file.c
    # 2004/11/23 14:07:31+03:00 vs@tribesman.namesys.com +4 -1
    # read_unix_file: missing calls to txn_restart() are added
    #
    diff -Nru a/plugin/file/file.c b/plugin/file/file.c
    --- a/plugin/file/file.c 2004-11-23 14:45:34 +03:00
    +++ b/plugin/file/file.c 2004-11-23 14:45:34 +03:00
    @@ -1741,6 +1741,8 @@
    while (left > 0) {
    size_t to_read;

    + txn_restart_current();
    +
    size = i_size_read(inode);
    if (*off >= size)
    /* position to read from is past the end of file */
    @@ -1774,7 +1776,6 @@
    if (user_space)
    reiser4_put_user_pages(pages, nr_pages);
    drop_nonexclusive_access(uf_info);
    - txn_restart_current();

    if (read < 0) {
    result = read;
    @@ -1974,6 +1975,8 @@

    drop_nonexclusive_access(unix_file_inode_data(inode));
    up_read(&reiser4_inode_data(inode)->coc_sem);
    +
    + txn_restart_current();

    reiser4_exit_context(&ctx);
    return page;
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