On Sun, 16 Apr 2006 01:43:08 -0500 "Saurabh Jain" <[EMAIL PROTECTED]> wrote:
> Hi Guys, > > I am getting the following kernel error while doing some experiments. > Any idea where things are going wrong. To me it looks like there is an > error while copying data from user space to kernel space. The > application which i am running is iperf. However i also have netem > module for emulating some wide area network characteristics like > delay. I am using delay of 100ms. > > ##################Error Message############################# > Unable to handle kernel NULL pointer dereference at virtual address 00000004 > printing eip: > c02fee3c > *pde = 7ded4067 > Oops: 0002 [#5] > Modules linked in: setparam(U) sch_netem(U) nfs(U) lockd(U) autofs4(U) > sunrpc(U)CPU: 0 > EIP: 0060:[<c02fee3c>] Not tainted VLI > EFLAGS: 00010286 (2.6.12-1.1390_FC4-emulab-1) > EIP is at tcp_transmit_skb+0x3ef/0x8de > eax: 00000000 ebx: f71a1a40 ecx: ed64f960 edx: ed64ff60 > esi: 00000000 edi: f2f98500 ebp: ed71b780 esp: f47bddd4 > ds: 007b es: 007b ss: 0068 > Process iperf (pid: 2443, threadinfo=f47bc000 task=f71a1a40) > Stack: f2f9854c c02d1019 ed71b7b8 f2f98500 ed15cc80 00000282 ed71b780 00000100 > c02ce99f f71a1a40 f2f98500 f71a1a40 00000000 f2f98500 f2f9854c c02f53ad > 00000000 ed335db8 f2f98500 f2f98500 f47bdeb8 00000000 00000000 002ce99f > Call Trace: > [<c02d1019>] skb_copy_datagram_iovec+0x180/0x1f8 > [<c02ce99f>] alloc_skb+0x31/0xc1 > [<c02f53ad>] tcp_recvmsg+0x2b1/0x74e > [<c02fd83f>] tcp_rcv_established+0x5d2/0x77a > [<c02ce2e0>] sock_common_recvmsg+0x41/0x57 > [<c02cb052>] sock_aio_read+0xf9/0x12b > [<c014fccb>] do_sync_read+0x9e/0xec > [<c01291ae>] autoremove_wake_function+0x0/0x37 > [<c014fe23>] vfs_read+0x10a/0x10e > [<c0150064>] sys_read+0x41/0x6a > [<c0102d29>] syscall_call+0x7/0xb > Code: a1 04 07 39 c0 e8 c0 e5 e3 ff 89 c2 85 c0 74 2d 83 87 08 04 00 00 01 8b > 8 > ############################################################# Please provide full info: kernel version and configuration as well as hardware information (lspci). Since it looks like a Fedora Core kernel, you may have to ask the fedora list. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
