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    SubjectRe: 2.6.24-rc1: hangs when logging in to X session
    Date
    Andrew Morton wrote:
    > > My laptop hangs when I try to log in to X with the current git kernel
    > > (commit 2a397e82c7db18019e408f953dd58dc1963a328c). It runs fine with
    > > 2.6.23. At boot time kdm starts normally, but hangs with the caps lock
    > > LED blinking immediately after I press Enter after typing the password.
    > >
    > > I can log in with a virtual console but didn't do much testing otherwise.
    > >
    > > The system is a Thinkpad R60, Intel Core 2 Duo, x86_64 running Debian.
    > > Kernel config is attached. A notable change in my config is that I
    > > enabled NO_HZ. I will try without it...
    >
    > hanging-with-led-blinking means the kernel oopsed.
    >
    > Please configure netconsole (Documentation/networking/netconsole.txt) and
    > see if you can capture the oops on another machine on the LAN.

    Here it is. Seems to be related to IPSEC - in fact the login process on my
    system will trigger a network access over the VPN, and I also got a similar
    crash without X shortly after starting the IPSEC tunnel.

    general protection fault: 0000 [1] PREEMPT SMP
    CPU 0
    Modules linked in: xfrm4_mode_tunnel xfrm_user xfrm4_tunnel af_key netconsole
    i915 drm rfcomm l2cap tunnel4 ipcomp esp4 ah4 nfsd exportfs autofs4
    cpufreq_conservative cpufreq_userspace cpufreq_stats cpufreq_powersave
    rpcsec_gss_krb5 auth_rpcgss nfs lockd nfs_acl sunrpc ipv6 deflate
    zlib_deflate twofish_x86_64 twofish_common camellia serpent blowfish
    des_generic xcbc sha1_generic crypto_null hmac crypto_hash fuse nls_utf8 ntfs
    xfs coretemp cpufreq_ondemand acpi_cpufreq freq_table snd_seq_dummy
    snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq
    snd_seq_device mousedev arc4 ecb snd_hda_intel snd_pcm_oss snd_mixer_oss
    pcmcia iwl3945 snd_pcm firmware_class snd_timer hci_usb snd serio_raw hwmon
    mac80211 bluetooth soundcore yenta_socket rsrc_nonstatic pcmcia_core video
    backlight output evdev psmouse i2c_i801 button nvram rtc iTCO_wdt pcspkr
    snd_page_alloc cfg80211 ext3 jbd mbcache sha256_generic aes_x86_64
    aes_generic cbc blkcipher dm_crypt dm_mirror dm_snapshot dm_mod firewire_ohci
    firewire_core ehci_hcd uhci_hcd crc_itu_t usbcore tg3 sr_mod cdrom sd_mod
    thermal processor fan
    Pid: 4347, comm: dnsmasq Not tainted 2.6.24-rc1-melech #4
    RIP: 0010:[<ffffffff880d3052>] [<ffffffff880d3052>] :cbc:xor_128+0x2/0x20
    RSP: 0018:ffff8100049fd930 EFLAGS: 00010287
    RAX: 000000000e502390 RBX: 0000000000000010 RCX: ffff810009f7ac00
    RDX: 0000000000000010 RSI: ffff810009c48e10 RDI: 6ddaa59200000644
    RBP: 00000000fffffff0 R08: ffff81000a4a9ec0 R09: 0000000000000000
    R10: 000000004fa99cad R11: 0000000000000014 R12: 0000000000000010
    R13: ffffffff880df710 R14: 6ddaa59200000644 R15: 0000000000000040
    FS: 00002b29576ca6e0(0000) GS:ffffffff80590000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 00002b898db23bc0 CR3: 0000000004a79000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process dnsmasq (pid: 4347, threadinfo ffff8100049fc000, task
    ffff81000404b7e0)
    Stack: ffffffff880d3488 ffff810000000000 ffff8100049fda48 ffff810009f7ac00
    ffffffff880d3050 bd42b9d15e8c4d52 dc7227cd8329fa6a 0000000000000000
    6ddaa59200000644 0000000000000000 6ddaa59200000644 ffff81000a4a9ec0
    Call Trace:
    [<ffffffff880d3488>] :cbc:crypto_cbc_encrypt+0x148/0x180
    [<ffffffff880d3050>] :cbc:xor_128+0x0/0x20
    [<ffffffff88570bdd>] :esp4:esp_output+0x28d/0x470
    [<ffffffff80483e3b>] csum_partial_copy_from_user+0x6b/0xf0
    [<ffffffff80476dc1>] xfrm_output+0xf1/0x240
    [<ffffffff8046d458>] xfrm4_output_finish2+0x78/0x230
    [<ffffffff804313d6>] ip_push_pending_frames+0x2d6/0x510
    [<ffffffff80433170>] ip_generic_getfrag+0x0/0x90
    [<ffffffff80452515>] udp_push_pending_frames+0x145/0x390
    [<ffffffff80453a27>] udp_sendmsg+0x337/0x750
    [<ffffffff803fcd2b>] sock_sendmsg+0x12b/0x140
    [<ffffffff803fcbea>] sock_recvmsg+0x14a/0x160
    [<ffffffff8024fed0>] autoremove_wake_function+0x0/0x30
    [<ffffffff803fde57>] move_addr_to_user+0x97/0xb0
    [<ffffffff80486e71>] _read_unlock+0x11/0x40
    [<ffffffff8040b890>] dev_ioctl+0x100/0x5c0
    [<ffffffff803fdb76>] sys_sendto+0x146/0x1b0
    [<ffffffff803fbfad>] sock_ioctl+0xed/0x260
    [<ffffffff802adc4f>] do_ioctl+0x2f/0xa0
    [<ffffffff8020c41e>] system_call+0x7e/0x83


    Code: 31 07 8b 46 04 31 47 04 8b 46 08 31 47 08 8b 46 0c 31 47 0c
    RIP [<ffffffff880d3052>] :cbc:xor_128+0x2/0x20
    RSP <ffff8100049fd930>
    Kernel panic - not syncing: Aiee, killing interrupt handler!


    Thanks,

    Marcus
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