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Message-ID: <46CB453B.5040005@redhat.com> Date: Tue, 21 Aug 2007 16:04:11 -0400 From: Chuck Ebbert <cebbert@...hat.com> To: Netdev <netdev@...r.kernel.org> Subject: Oops in 2.6.22.1: skb_copy_and_csum_datagram_iovec() 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. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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