Right after unloading zFCP device I got:
[ 1432.522123] sysfs group 0000000000b5aa30 not found for kobject '1:0:0:1073823786' [ 1432.522138] ------------[ cut here ]------------ [ 1432.522139] WARNING: at /build/linux-RgAt0H/linux-4.3.0/fs/sysfs/group.c:224 [ 1432.522140] Modules linked in: ghash_s390(E) prng(E) aes_s390(E) des_s390(E) des_generic(E) sha512_s390(E) sha256_s390(E) sha1_s390(E) sha_common(E) vmur(E) qeth_l2(E) qeth(E) ccwgroup(E) dasd_eckd_mod(E) dasd_mod(E) zfcp(E-) qdio(E) scsi_transport_fc(E) [ 1432.522149] CPU: 2 PID: 5873 Comm: rmmod Tainted: G E 4.3.0-2-generic #11-Ubuntu [ 1432.522151] task: 0000000076f4a9e0 ti: 00000000ed85c000 task.ti: 00000000ed85c000 [ 1432.522152] Krnl PSW : 0704d00180000000 000000000036cbee (sysfs_remove_group+0xbe/0xd0) [ 1432.522158] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 EA:3 Krnl GPRS: 0000000000c76c33 0000000000c58e3c 0000000000000045 00000000fb1ac7a0 [ 1432.522160] 000000000036cbea 0000000000000000 0000000078d70050 0000000078d70000 [ 1432.522161] 0000000080000000 00000000f93df000 0000000078d7e010 0000000000000000 [ 1432.522162] 00000000ed85c000 0000000000b5aa30 000000000036cbea 00000000ed85fa78 [ 1432.522168] Krnl Code: 000000000036cbde: c020002bc358 larl %r2,8e528e 000000000036cbe4: c0e5fff7144a brasl %r14,24f478 #000000000036cbea: a7f40001 brc 15,36cbec >000000000036cbee: e340f0c00004 lg %r4,192(%r15) 000000000036cbf4: ebaff0a00004 lmg %r10,%r15,160(%r15) 000000000036cbfa: 07f4 bcr 15,%r4 000000000036cbfc: 0707 bcr 0,%r7 000000000036cbfe: 0707 bcr 0,%r7 [ 1432.522177] Call Trace: [ 1432.522179] ([<000000000036cbea>] sysfs_remove_group+0xba/0xd0) [ 1432.522183] [<0000000000575a44>] device_del+0x5c/0x268 [ 1432.522184] [<0000000000575c90>] device_unregister+0x40/0x98 [ 1432.522186] [<00000000004d9b0c>] bsg_unregister_queue+0x74/0xd8 [ 1432.522189] [<00000000005aff76>] __scsi_remove_device+0xe6/0x118 [ 1432.522192] [<00000000005adaca>] scsi_forget_host+0xca/0xf8 [ 1432.522193] [<000000000059fa86>] scsi_remove_host+0xbe/0x1c8 [ 1432.522200] [<000003ff800496a6>] zfcp_scsi_adapter_unregister+0x9e/0xc8 [zfcp] [ 1432.522202] [<000003ff8003b55e>] zfcp_adapter_unregister+0x7e/0xc0 [zfcp] [ 1432.522205] [<000003ff8003c876>] zfcp_ccw_remove+0x28e/0x2b0 [zfcp] [ 1432.522207] [<0000000000604814>] ccw_device_remove+0x44/0x210 [ 1432.522209] [<000000000057a9fe>] __device_release_driver+0xa6/0x150 [ 1432.522211] [<000000000057b782>] driver_detach+0x11a/0x120 [ 1432.522212] [<000000000057a342>] bus_remove_driver+0x82/0x118 [ 1432.522214] [<000003ff8004bdd2>] zfcp_module_exit+0x2a/0x258 [zfcp] [ 1432.522217] [<00000000001caf6c>] SyS_delete_module+0x1c4/0x210 [ 1432.522221] [<000000000076dbfe>] system_call+0xd6/0x264 [ 1432.522222] [<000003ffb0f6e416>] 0x3ffb0f6e416 [ 1432.522223] Last Breaking-Event-Address: [ 1432.522224] [<000000000036cbea>] sysfs_remove_group+0xba/0xd0 [ 1432.522225] ---[ end trace 2e7b1c668b02f90a ]--- [ 1432.522430] sysfs group 0000000000b5aa30 not found for kobject '1:0:0:1073823786' [ 1432.522434] ------------[ cut here ]------------
Opening the bug for tracking purposes.
Right after unloading zFCP device I got:
[ 1432.522123] sysfs group 0000000000b5aa30 not found for kobject '1:0:0:1073823786' linux-RgAt0H/ linux-4. 3.0/fs/ sysfs/group. c:224 fc(E) remove_ group+0xbe/ 0xd0)
0000000000 36cbe4: c0e5fff7144a brasl %r14,24f478
#0000000000 36cbea: a7f40001 brc 15,36cbec
>0000000000 36cbee: e340f0c00004 lg %r4,192(%r15)
0000000000 36cbf4: ebaff0a00004 lmg %r10,%r15,160(%r15)
0000000000 36cbfa: 07f4 bcr 15,%r4
0000000000 36cbfc: 0707 bcr 0,%r7
0000000000 36cbfe: 0707 bcr 0,%r7 cbea>] sysfs_remove_ group+0xba/ 0xd0) a44>] device_ del+0x5c/ 0x268 c90>] device_ unregister+ 0x40/0x98 b0c>] bsg_unregister_ queue+0x74/ 0xd8 f76>] __scsi_ remove_ device+ 0xe6/0x118 aca>] scsi_forget_ host+0xca/ 0xf8 a86>] scsi_remove_ host+0xbe/ 0x1c8 6a6>] zfcp_scsi_ adapter_ unregister+ 0x9e/0xc8 [zfcp] 55e>] zfcp_adapter_ unregister+ 0x7e/0xc0 [zfcp] 876>] zfcp_ccw_ remove+ 0x28e/0x2b0 [zfcp] 814>] ccw_device_ remove+ 0x44/0x210 9fe>] __device_ release_ driver+ 0xa6/0x150 782>] driver_ detach+ 0x11a/0x120 342>] bus_remove_ driver+ 0x82/0x118 dd2>] zfcp_module_ exit+0x2a/ 0x258 [zfcp] f6c>] SyS_delete_ module+ 0x1c4/0x210 bfe>] system_ call+0xd6/ 0x264 416>] 0x3ffb0f6e416 Event-Address: bea>] sysfs_remove_ group+0xba/ 0xd0
[ 1432.522138] ------------[ cut here ]------------
[ 1432.522139] WARNING: at /build/
[ 1432.522140] Modules linked in: ghash_s390(E) prng(E) aes_s390(E) des_s390(E) des_generic(E) sha512_s390(E) sha256_s390(E) sha1_s390(E) sha_common(E) vmur(E) qeth_l2(E) qeth(E) ccwgroup(E) dasd_eckd_mod(E) dasd_mod(E) zfcp(E-) qdio(E) scsi_transport_
[ 1432.522149] CPU: 2 PID: 5873 Comm: rmmod Tainted: G E 4.3.0-2-generic #11-Ubuntu
[ 1432.522151] task: 0000000076f4a9e0 ti: 00000000ed85c000 task.ti: 00000000ed85c000
[ 1432.522152] Krnl PSW : 0704d00180000000 000000000036cbee (sysfs_
[ 1432.522158] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 EA:3
Krnl GPRS: 0000000000c76c33 0000000000c58e3c 0000000000000045 00000000fb1ac7a0
[ 1432.522160] 000000000036cbea 0000000000000000 0000000078d70050 0000000078d70000
[ 1432.522161] 0000000080000000 00000000f93df000 0000000078d7e010 0000000000000000
[ 1432.522162] 00000000ed85c000 0000000000b5aa30 000000000036cbea 00000000ed85fa78
[ 1432.522168] Krnl Code: 000000000036cbde: c020002bc358 larl %r2,8e528e
[ 1432.522177] Call Trace:
[ 1432.522179] ([<000000000036
[ 1432.522183] [<0000000000575
[ 1432.522184] [<0000000000575
[ 1432.522186] [<00000000004d9
[ 1432.522189] [<00000000005af
[ 1432.522192] [<00000000005ad
[ 1432.522193] [<000000000059f
[ 1432.522200] [<000003ff80049
[ 1432.522202] [<000003ff8003b
[ 1432.522205] [<000003ff8003c
[ 1432.522207] [<0000000000604
[ 1432.522209] [<000000000057a
[ 1432.522211] [<000000000057b
[ 1432.522212] [<000000000057a
[ 1432.522214] [<000003ff8004b
[ 1432.522217] [<00000000001ca
[ 1432.522221] [<000000000076d
[ 1432.522222] [<000003ffb0f6e
[ 1432.522223] Last Breaking-
[ 1432.522224] [<000000000036c
[ 1432.522225] ---[ end trace 2e7b1c668b02f90a ]---
[ 1432.522430] sysfs group 0000000000b5aa30 not found for kobject '1:0:0:1073823786'
[ 1432.522434] ------------[ cut here ]------------
Opening the bug for tracking purposes.