Hi,

After a workaround (not fully solved but working without error) for my
previous problem posted "iscsid : mgmt_ipc_write_rsp: rsp to fd 5", I
have now a crash of iscsid (started with -f -d 8) when I want to login
in my first target discovered. (in loopback)

iscsiadm -m node -T iqn.2004-04.com.qnap:TS-219:iSCSI.testEXT3.8C3E96 -
p 127.0.0.1:3260 -l

iscsid crash with message :
***************** at start-up
Loading iSCSI transport class v2.0-870.
iscsi: registered transport (tcp)
****************** and when crashing
kernel BUG at include/linux/skbuff.h:933!
Unable to handle kernel NULL pointer dereference at virtual address
00000000
pgd = d7928000
[00000000] *pgd=17856031, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1]
Modules linked in: iscsi_tcp libiscsi scsi_transport_iscsi iscsi_trgt
fuse ext4 jbd2 sysinfo usblp usbhid usb_storage
CPU: 0    Not tainted  (2.6.22.18 #1)
PC is at __bug+0x20/0x2c
LR is at release_console_sem+0x1d4/0x1ec
pc : [<c0107338>]    lr : [<c012a9c4>]    psr: 60000013
sp : d783fc44  ip : 00000000  fp : d783fc50
r10: 00000000  r9 : 00000000  r8 : dad6a400
r7 : 000000d0  r6 : dad6ac00  r5 : 00000048  r4 : dad6ac60
r3 : 00000000  r2 : c03f1a6c  r1 : 00002f31  r0 : 0000002d
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment user
Control: 0005397f  Table: 17928000  DAC: 00000015
Process iscsid (pid: 7823, stack limit = 0xd783e268)
Stack: (0xd783fc44 to 0xd7840000)
fc40:          d783fca4 d783fc54 bf08c0c8 c0107328 d783fc60 d7db6924
c012763c
fc60: dad6ac60 d7db6900 00000003 00000000 00000000 db03b940 0100007f
dad6ac00
fc80: 00000048 dad6ac00 000000d0 dad6a400 00000000 00000000 d783fcbc
d783fca8
fca0: c0382084 bf08bc70 dad6ac00 00000048 d783fcd4 d783fcc0 c0380a5c
c0382074
fcc0: 00000000 d7db6900 d783fd14 d783fcd8 c03815f4 c0380a40 dad6a400
dc0c1400
fce0: 00000048 7fffffff 00000048 d7db6900 00000000 dad6a400 d783ff54
d8394a40
fd00: 00000000 00000048 d783fd6c d783fd18 c0382044 c038140c d783fd64
d783fd28
fd20: 00000000 d783fe00 c00335fc 00001e8f 00000000 00000000 00000000
00000000
fd40: 00000006 00000000 d8394a40 d783fdb4 d86442e0 d783ff54 d783fd70
00000048
fd60: d783fe6c d783fd70 c0030950 c0381dc0 c042fc20 00000008 00000000
00000001
fd80: ffffffff 00000000 00000000 00000000 00000000 00000000 d86442e0
dc9b2080
fda0: 00000000 00000000 c0403698 d86442e0 c013d8c8 d783fdb4 d783fdb4
c0032d7c
fdc0: c0035f68 c039404c 36d5489c d783fe00 c042ac38 00000000 d783fe1c
00000040
fde0: d783fe14 d783fdf0 c0374294 c0031970 c042ac38 c042ad58 c042a810
c042ac28
fe00: 0002ec9f d8394e60 d783fe44 00000048 d8394a40 c0374208 d783fd2c
d783ff54
fe20: d783fef4 00000128 d783fef4 d783ff54 d783fef4 00000128 d783fef4
d783fef4
fe40: 00000008 00000000 d8394a40 00000048 d783ff34 d783fef4 00000000
00000008
fe60: d783ffa4 d783fe70 c036850c c00308a4 d783fe94 00000010 00000000
00000000
fe80: 00000000 d91b9120 d783feac d783fe98 c0030d7c 00000004 beaff4fc
00000004
fea0: beaff4f8 beaff4fc 00000004 00000000 d91b9120 00000010 beaff4f8
d783fefc
fec0: c0040188 beaff430 00000010 00000000 00000000 c0368bb4 d8394e60
d783fefc
fee0: beaff430 beaff4f8 d783ffa4 d783fef8 c0368fc8 00037360 00000000
f7bd0002
ff00: 0100007f 00000000 00000000 00000000 00000000 00000000 00000000
00000000
ff20: 00000000 00000000 00000000 00000000 d783ff7c d783ff40 c002530c
00000000
ff40: d783ff6c 00000004 c0367b88 00000001 beaff4fc d783fe74 0000000c
d783fef4
ff60: 00000001 00000000 00000000 00000000 00000000 ffffff97 00000000
beaff4a8
ff80: beaff45c 00000038 00000128 c0040188 d783e000 00000000 00000000
d783ffa8
ffa0: c003ffe0 c0368364 beaff4a8 beaff45c 00000004 beaff45c 00000000
00037318
ffc0: beaff4a8 beaff45c 00000038 00000128 00000001 00036818 00000001
00037328
ffe0: beaff4a8 beaff450 0001daa8 400f404c 60000010 00000004 00000000
00000000
Backtrace:
[<c0107318>] (__bug+0x0/0x2c) from [<bf08c0c8>] (iscsi_if_rx
+0x468/0x818 [scsi_transport_iscsi])
[<bf08bc60>] (iscsi_if_rx+0x0/0x818 [scsi_transport_iscsi]) from
[<c0382084>] (netlink_data_ready+0x20/0x6c)
[<c0382064>] (netlink_data_ready+0x0/0x6c) from [<c0380a5c>]
(netlink_sendskb+0x2c/0x60)
 r5:00000048 r4:dad6ac00
[<c0380a30>] (netlink_sendskb+0x0/0x60) from [<c03815f4>]
(netlink_unicast+0x1f8/0x20c)
 r5:d7db6900 r4:00000000
[<c03813fc>] (netlink_unicast+0x0/0x20c) from [<c0382044>]
(netlink_sendmsg+0x294/0x2b4)
[<c0381db0>] (netlink_sendmsg+0x0/0x2b4) from [<c0030950>]
(sock_sendmsg+0xbc/0xdc)
[<c0030894>] (sock_sendmsg+0x0/0xdc) from [<c036850c>] (sys_sendmsg
+0x1b8/0x214)
[<c0368354>] (sys_sendmsg+0x0/0x214) from [<c003ffe0>]
(ret_fast_syscall+0x0/0x2c)
Code: e1a01000 e59f000c eb008ef0 e3a03000 (e5833000)

it is a know problem ?
Philippe.
NB. seems to be a big challenge to obtain a running initiator on
Qnap ... sorry ....
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