Hi.

I installed open-iscsi-2.0-869.2.tar.gz on CentOS 5.1 on x86_64
machine with Intel 10g NIC and after loading the
iSCSI initiator daemon i get the following kernel oops.

<1>Unable to handle kernel NULL pointer dereference at 00000000000005a8 RIP:
 [<ffffffff8841874d>] :iscsi_tcp:iscsi_tcp_recv+0xb9/0x4a3
PGD 11027d067 PUD 11023e067 PMD 0
Oops: 0000 [1] SMP
last sysfs file: /class/scsi_host/host2/scan
CPU 2
Modules linked in: nfs(U) lockd(U) fscache(U) nfs_acl(U) netconsole(U)
autofs4(U) hidp(U) rfcomm(U) l2cap(U) bluetooth(U) sunrpc(U)
rdma_cm(U) ib_cm(U) iw_cm(U) ib_addr(U) ib_local_sa(U) ib_sa(U)
ib_mad(U) ib_core(U) iscsi_tcp(U) libiscsi(U) scsi_transport_iscsi(U)
dm_multipath(U) video(U) sbs(U) backlight(U) i2c_ec(U) i2c_core(U)
button(U) battery(U) asus_acpi(U) acpi_memhotplug(U) ac(U) ipv6(U)
parport_pc(U) lp(U) parport(U) qla2xxx(U) shpchp(U) ixgbe(U) ide_cd(U)
cdrom(U) bnx2(U) serio_raw(U) dca(U) pcspkr(U) dm_snapshot(U)
dm_zero(U) dm_mirror(U) dm_mod(U) scsi_transport_fc(U) ata_piix(U)
libata(U) cciss(U) sd_mod(U) scsi_mod(U) ext3(U) jbd(U) ehci_hcd(U)
ohci_hcd(U) uhci_hcd(U)
Pid: 705, comm: kjournald Tainted: GF     2.6.18-53.el5-scst #3
RIP: 0010:[<ffffffff8841874d>]  [<ffffffff8841874d>]
:iscsi_tcp:iscsi_tcp_recv+0xb9/0x4a3
RSP: 0018:ffff81012ff67ba0  EFLAGS: 00010206
RAX: 0000000000000a88 RBX: ffff810115b48820 RCX: 0000000000000a88
RDX: ffff81012ff67bb0 RSI: 00000000000005a8 RDI: ffff810110346578
RBP: 0000000000000a88 R08: 00000000296dac9f R09: 0000000000000000
R10: ffff810115b48820 R11: 0000000000000050 R12: 0000000000000a88
R13: ffff81012e43f290 R14: 00000000296da6f7 R15: 00000000000005a8
FS:  0000000000000000(0000) GS:ffff81012ff24e40(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00000000000005a8 CR3: 00000001101d0000 CR4: 00000000000006e0
Process kjournald (pid: 705, threadinfo ffff81012c886000, task ffff81012e815040)
Stack:  ffff810115b48800 00000000000005a8 00000b5000000000 000005a800000000
 ffff8101207fe280 ffff8101296d2d18 0000000000000000 ffff8101101854c0
 0000004400000000 ffff810000010c00 0002022000000000 0000000000000002
Call Trace:
 <IRQ>  [<ffffffff80035584>] tcp_read_sock+0x6b/0x190
 [<ffffffff88418694>] :iscsi_tcp:iscsi_tcp_recv+0x0/0x4a3
 [<ffffffff88419531>] :iscsi_tcp:iscsi_tcp_data_ready+0x43/0x6e
 [<ffffffff800172d6>] cache_grow+0x356/0x395
 [<ffffffff8001b51a>] tcp_rcv_established+0x62c/0x917
 [<ffffffff8003ab86>] tcp_v4_do_rcv+0x2a/0x300
 [<ffffffff80026f09>] tcp_v4_rcv+0x9f6/0xa5f
 [<ffffffff881ea588>] :ixgbe:ixgbe_alloc_rx_buffers+0x1a8/0x260
 [<ffffffff80033ff4>] ip_local_deliver+0x19d/0x263
 [<ffffffff800350cc>] ip_rcv+0x49c/0x4df
 [<ffffffff8001ff88>] netif_receive_skb+0x330/0x3ae
 [<ffffffff80030177>] process_backlog+0x84/0xe2
 [<ffffffff8000c3ce>] net_rx_action+0xa4/0x1a5
 [<ffffffff80011cb4>] __do_softirq+0x5e/0xd5
 [<ffffffff80152593>] end_msi_irq_w_maskbit+0xf/0x1c
 [<ffffffff8005d2fc>] call_softirq+0x1c/0x28
 [<ffffffff8006b53a>] do_softirq+0x2c/0x85
 [<ffffffff8006b3c2>] do_IRQ+0xec/0xf5
 [<ffffffff8005c615>] ret_from_intr+0x0/0xa
 <EOI>  [<ffffffff880367f3>] :jbd:journal_switch_revoke_table+0x43/0x47
 [<ffffffff880345d4>] :jbd:journal_commit_transaction+0x26e/0x1086
 [<ffffffff8003d06a>] lock_timer_base+0x1b/0x3c
 [<ffffffff80048da4>] try_to_del_timer_sync+0x51/0x5a
 [<ffffffff8803840e>] :jbd:kjournald+0xc1/0x213
 [<ffffffff8009c446>] autoremove_wake_function+0x0/0x2e
 [<ffffffff8009c283>] keventd_create_kthread+0x0/0x61
 [<ffffffff8803834d>] :jbd:kjournald+0x0/0x213
 [<ffffffff8009c283>] keventd_create_kthread+0x0/0x61
 [<ffffffff80032207>] kthread+0xfe/0x132
 [<ffffffff8005cfb1>] child_rip+0xa/0x11
 [<ffffffff8009c283>] keventd_create_kthread+0x0/0x61
 [<ffffffff80032109>] kthread+0x0/0x132
 [<ffffffff8005cfa7>] child_rip+0x0/0x11


Code: f3 a4 48 83 7b 18 00 0f 84 f1 00 00 00 85 ed 0f 84 e9 00 00
RIP  [<ffffffff8841874d>] :iscsi_tcp:iscsi_tcp_recv+0xb9/0x4a3
 RSP <ffff81012ff67ba0>
CR2: 00000000000005a8
 <0>Kernel panic - not syncing: Fatal exception





When i tried 10g NIC from another vendor everything was fine (maybe it
is just luck or timing issue).

Did anyone notice this failure before?

thanks
Dotan

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