https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=253290
18:57:54 osama kernel: BUG: unable to handle kernel NULL pointer dereference at
virtual address 00000004
18:57:54 osama kernel: printing eip:
18:57:54 osama kernel: c05c4026
18:57:54 osama kernel: *pde = 1d860067
18:57:54 osama kernel: *pte = 00000000
18:57:54 osama kernel: Oops: 0000 [#1]
18:57:54 osama kernel: SMP
18:57:54 osama kernel: last sysfs file: /power/state
18:57:54 osama kernel: Modules linked in: nfsd exportfs lockd nfs_acl autofs4
sunrpc dm_mirror dm_multipath dm_mod video sbs button dock battery ac ipv6 lp
snd_via82xx snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss
snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss snd_pcm snd_timer
i2c_viapro snd_page_alloc i2c_core 8139cp snd_mpu401_uart floppy snd_rawmidi
via_ircc snd_seq_device via_rhine 8139too irda snd mii crc_ccitt soundcore
ns558 parport_pc gameport ide_cd rtc_cmos serio_raw parport cdrom ext2 mbcache
ehci_hcd ohci_hcd uhci_hcd
18:57:54 osama kernel: CPU: 0
18:57:54 osama kernel: EIP: 0060:[<c05c4026>] Not tainted VLI
18:57:54 osama kernel: EFLAGS: 00010246 (2.6.22.1-32.fc6 #1)
18:57:54 osama kernel: EIP is at skb_copy_and_csum_datagram_iovec+0x17/0xca
18:57:54 osama kernel: eax: d4341180 ebx: 00000000 ecx: 00000000 edx:
00000008
18:57:54 osama kernel: esi: d4341180 edi: 00000000 ebp: 00000008 esp:
d488fd7c
18:57:54 osama kernel: ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
18:57:54 osama kernel: Process lockd (pid: 2567, ti=d488f000 task=d4876000
task.ti=d488f000)
18:57:54 osama kernel: Stack: 00000000 00000000 00000246 00000292 d4341180
d58bf660 d4879014 d488ff18
18:57:54 osama kernel: c05ffaf7 d488fdb0 00000000 00000000 00000000
d4c30980 00000040 c07374c0
18:57:54 osama kernel: d488ff18 d488ff18 c05be8a5 00000000 00000040
00000002 d488fdd8 00000010
18:57:54 osama kernel: Call Trace:
18:57:54 osama kernel: [<c05ffaf7>] udp_recvmsg+0xdd/0x1cd
18:57:54 osama kernel: [<c05be8a5>] sock_common_recvmsg+0x3e/0x54
18:57:54 osama kernel: [<c05bd0fa>] sock_recvmsg+0xec/0x107
18:57:54 osama kernel: [<c041d0c2>] update_curr+0x23b/0x25c
18:57:54 osama kernel: [<c0433e31>] autoremove_wake_function+0x0/0x35
18:57:54 osama kernel: [<c041ce20>] update_stats_wait_end+0x84/0xad
18:57:54 osama kernel: [<c06278fe>] __reacquire_kernel_lock+0x2f/0x4b
18:57:54 osama kernel: [<c041d87a>] enqueue_entity+0x276/0x294
18:57:54 osama kernel: [<c05be67f>] kernel_recvmsg+0x31/0x40
18:57:54 osama kernel: [<e0bc52d4>] svc_udp_recvfrom+0x114/0x368 [sunrpc]
18:57:54 osama kernel: [<c0626888>] schedule_timeout+0x13/0x8f
18:57:54 osama kernel: [<e0bc620e>] svc_recv+0x2e5/0x393 [sunrpc]
18:57:54 osama kernel: [<c0430e7d>] create_workqueue_thread+0x38/0x49
18:57:54 osama kernel: [<c041f109>] default_wake_function+0x0/0xc
18:57:54 osama kernel: [<e0ac31fe>] lockd+0x108/0x222 [lockd]
18:57:54 osama kernel: [<c0404e76>] ret_from_fork+0x6/0x20
18:57:54 osama kernel: [<e0ac30f6>] lockd+0x0/0x222 [lockd]
18:57:54 osama kernel: [<e0ac30f6>] lockd+0x0/0x222 [lockd]
18:57:54 osama kernel: [<c0406177>] kernel_thread_helper+0x7/0x10
18:57:54 osama kernel: =======================
18:57:54 osama kernel: Code: f6 75 04 31 c0 eb 05 b8 f2 ff ff ff 83 c4 30 5b 5e
5f 5d c3 55 89 d5 57 56 89 c6 53 89 cb 83 ec 10 8b 78 54 29 d7 eb 03 83 c3 08
<8b> 43 04 85 c0 74 f6 39 f8 73 26 89 f0 e8 fa fd ff ff 66 85 c0
Oops is here:
int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb,
int hlen, struct iovec *iov)
{
__wsum csum;
int chunk = skb->len - hlen;
/* Skip filled elements.
* Pretty silly, look at memcpy_toiovec, though 8)
*/
====> while (!iov->iov_len)
iov++;
udp_recvmsg() passed a NULL iov to this function.
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