[Xen-bugs] [Bug 103] New: Oops with large scp

[pl@xxxxxxxxxx]

http://bugzilla.xensource.com/cgi-bin/bugzilla/show_bug.cgi?id=103

           Summary: Oops with large scp
           Product: Xen
           Version: unstable
          Platform: x86
        OS/Version: Linux-2.6
            Status: NEW
          Severity: major
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: pl@xxxxxxxxxx
                CC: hohnbaum@xxxxxxxxxx


I was looking into another problem I'm having getting disconnected from ssh
sessions to dom0 and Dan Smith mentioned he had seen that problem accompanied by
an oops in large scp transfers.  I did a scp -r of a large directory (xen source
tree) from another box to my dom0 and got this:

Oops: 0000 [#1]
PREEMPT
Modules linked in: thermal processor fan button battery ac sworks_agp agpgart
CPU:    0
EIP:    0061:[<c03dccf3>]    Not tainted VLI
EFLAGS: 00010297   (2.6.12-xen0)
EIP is at skb_release_data+0x53/0x100
eax: 0d8b5ffb   ebx: 00000000   ecx: c6a57080   edx: f4a0eb4c
esi: c6180280   edi: ffffffff   ebp: c48b2400   esp: c95cddb0
ds: 007b   es: 007b   ss: 0069
Process sshd (pid: 24308, threadinfo=c95cc000 task=cbf68a00)
Stack: cead5880 c6180280 ffffffff c03dce65 c6180280 c6180280 c03dcdb0 c6180280
       764029b0 764029b0 c0403698 c6180280 000005a8 c95cdea8 000005a8 cd447c00
       00000001 c48b244c c95cc000 00000001 00000000 000005a8 c48b26e4 00000000
Call Trace:
 [<c03dce65>] __kfree_skb+0x95/0x140
 [<c03dcdb0>] kfree_skbmem+0x10/0x30
 [<c0403698>] tcp_recvmsg+0x648/0x740
 [<c03dc2e2>] sock_common_recvmsg+0x52/0x70
 [<c03d8790>] sock_aio_read+0x100/0x120
 [<c0166e89>] do_sync_read+0xc9/0x110
 [<c017d0ac>] do_select+0x2ec/0x310
 [<c0137ec0>] autoremove_wake_function+0x0/0x60
 [<c017d354>] sys_select+0x244/0x470
 [<c0167008>] vfs_read+0x138/0x140
 [<c01672b1>] sys_read+0x51/0x80
 [<c010a4e3>] syscall_call+0x7/0xb
Code: d8 89 c2 0f c1 01 01 d0 85 c0 75 64 8b 41 04 85 c0 74 39 31 db 39 c3 72
0eeb 31 8b 8e a8 00 00 00 43 3b 59 04 73 25 8b 54 d9 10 <8b> 02 f6 c4 08 75 ef
8b 42 04 40 74 5a 83 42 04 ff 0f 98 c0 84



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