linux-stable.git/drivers/scsi, branch v4.9.210

scsi: bfa: release allocated memory in case of error

2020-01-14T19:04:31+00:00

commit 0e62395da2bd5166d7c9e14cbc7503b256a34cb0 upstream.

In bfad_im_get_stats if bfa_port_get_stats fails, allocated memory needs to
be released.

Link: https://lore.kernel.org/r/20190910234417.22151-1-navid.emamdoost@gmail.com
Signed-off-by: Navid Emamdoost 
Signed-off-by: Martin K. Petersen 
Cc: Ben Hutchings 
Signed-off-by: Greg Kroah-Hartman

scsi: libsas: stop discovering if oob mode is disconnected

2020-01-12T10:24:10+00:00

[ Upstream commit f70267f379b5e5e11bdc5d72a56bf17e5feed01f ]

The discovering of sas port is driven by workqueue in libsas. When libsas
is processing port events or phy events in workqueue, new events may rise
up and change the state of some structures such as asd_sas_phy.  This may
cause some problems such as follows:

==>thread 1                       ==>thread 2

                                  ==>phy up
                                  ==>phy_up_v3_hw()
                                    ==>oob_mode = SATA_OOB_MODE;
                                  ==>phy down quickly
                                  ==>hisi_sas_phy_down()
                                    ==>sas_ha->notify_phy_event()
                                    ==>sas_phy_disconnected()
                                      ==>oob_mode = OOB_NOT_CONNECTED
==>workqueue wakeup
==>sas_form_port()
  ==>sas_discover_domain()
    ==>sas_get_port_device()
      ==>oob_mode is OOB_NOT_CONNECTED and device
         is wrongly taken as expander

This at last lead to the panic when libsas trying to issue a command to
discover the device.

[183047.614035] Unable to handle kernel NULL pointer dereference at
virtual address 0000000000000058
[183047.622896] Mem abort info:
[183047.625762]   ESR = 0x96000004
[183047.628893]   Exception class = DABT (current EL), IL = 32 bits
[183047.634888]   SET = 0, FnV = 0
[183047.638015]   EA = 0, S1PTW = 0
[183047.641232] Data abort info:
[183047.644189]   ISV = 0, ISS = 0x00000004
[183047.648100]   CM = 0, WnR = 0
[183047.651145] user pgtable: 4k pages, 48-bit VAs, pgdp =
00000000b7df67be
[183047.657834] [0000000000000058] pgd=0000000000000000
[183047.662789] Internal error: Oops: 96000004 [#1] SMP
[183047.667740] Process kworker/u16:2 (pid: 31291, stack limit =
0x00000000417c4974)
[183047.675208] CPU: 0 PID: 3291 Comm: kworker/u16:2 Tainted: G
W  OE 4.19.36-vhulk1907.1.0.h410.eulerosv2r8.aarch64 #1
[183047.687015] Hardware name: N/A N/A/Kunpeng Desktop Board D920S10,
BIOS 0.15 10/22/2019
[183047.695007] Workqueue: 0000:74:02.0_disco_q sas_discover_domain
[183047.700999] pstate: 20c00009 (nzCv daif +PAN +UAO)
[183047.705864] pc : prep_ata_v3_hw+0xf8/0x230 [hisi_sas_v3_hw]
[183047.711510] lr : prep_ata_v3_hw+0xb0/0x230 [hisi_sas_v3_hw]
[183047.717153] sp : ffff00000f28ba60
[183047.720541] x29: ffff00000f28ba60 x28: ffff8026852d7228
[183047.725925] x27: ffff8027dba3e0a8 x26: ffff8027c05fc200
[183047.731310] x25: 0000000000000000 x24: ffff8026bafa8dc0
[183047.736695] x23: ffff8027c05fc218 x22: ffff8026852d7228
[183047.742079] x21: ffff80007c2f2940 x20: ffff8027c05fc200
[183047.747464] x19: 0000000000f80800 x18: 0000000000000010
[183047.752848] x17: 0000000000000000 x16: 0000000000000000
[183047.758232] x15: ffff000089a5a4ff x14: 0000000000000005
[183047.763617] x13: ffff000009a5a50e x12: ffff8026bafa1e20
[183047.769001] x11: ffff0000087453b8 x10: ffff00000f28b870
[183047.774385] x9 : 0000000000000000 x8 : ffff80007e58f9b0
[183047.779770] x7 : 0000000000000000 x6 : 000000000000003f
[183047.785154] x5 : 0000000000000040 x4 : ffffffffffffffe0
[183047.790538] x3 : 00000000000000f8 x2 : 0000000002000007
[183047.795922] x1 : 0000000000000008 x0 : 0000000000000000
[183047.801307] Call trace:
[183047.803827]  prep_ata_v3_hw+0xf8/0x230 [hisi_sas_v3_hw]
[183047.809127]  hisi_sas_task_prep+0x750/0x888 [hisi_sas_main]
[183047.814773]  hisi_sas_task_exec.isra.7+0x88/0x1f0 [hisi_sas_main]
[183047.820939]  hisi_sas_queue_command+0x28/0x38 [hisi_sas_main]
[183047.826757]  smp_execute_task_sg+0xec/0x218
[183047.831013]  smp_execute_task+0x74/0xa0
[183047.834921]  sas_discover_expander.part.7+0x9c/0x5f8
[183047.839959]  sas_discover_root_expander+0x90/0x160
[183047.844822]  sas_discover_domain+0x1b8/0x1e8
[183047.849164]  process_one_work+0x1b4/0x3f8
[183047.853246]  worker_thread+0x54/0x470
[183047.856981]  kthread+0x134/0x138
[183047.860283]  ret_from_fork+0x10/0x18
[183047.863931] Code: f9407a80 528000e2 39409281 72a04002 (b9405800)
[183047.870097] kernel fault(0x1) notification starting on CPU 0
[183047.875828] kernel fault(0x1) notification finished on CPU 0
[183047.881559] Modules linked in: unibsp(OE) hns3(OE) hclge(OE)
hnae3(OE) mem_drv(OE) hisi_sas_v3_hw(OE) hisi_sas_main(OE)
[183047.892418] ---[ end trace 4cc26083fc11b783  ]---
[183047.897107] Kernel panic - not syncing: Fatal exception
[183047.902403] kernel fault(0x5) notification starting on CPU 0
[183047.908134] kernel fault(0x5) notification finished on CPU 0
[183047.913865] SMP: stopping secondary CPUs
[183047.917861] Kernel Offset: disabled
[183047.921422] CPU features: 0x2,a2a00a38
[183047.925243] Memory Limit: none
[183047.928372] kernel reboot(0x2) notification starting on CPU 0
[183047.934190] kernel reboot(0x2) notification finished on CPU 0
[183047.940008] ---[ end Kernel panic - not syncing: Fatal exception
]---

Fixes: 2908d778ab3e ("[SCSI] aic94xx: new driver")
Link: https://lore.kernel.org/r/20191206011118.46909-1-yanaijie@huawei.com
Reported-by: Gao Chuan 
Reviewed-by: John Garry 
Signed-off-by: Jason Yan 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: iscsi: qla4xxx: fix double free in probe

2020-01-12T10:24:09+00:00

[ Upstream commit fee92f25777789d73e1936b91472e9c4644457c8 ]

On this error path we call qla4xxx_mem_free() and then the caller also
calls qla4xxx_free_adapter() which calls qla4xxx_mem_free().  It leads to a
couple double frees:

drivers/scsi/qla4xxx/ql4_os.c:8856 qla4xxx_probe_adapter() warn: 'ha->chap_dma_pool' double freed
drivers/scsi/qla4xxx/ql4_os.c:8856 qla4xxx_probe_adapter() warn: 'ha->fw_ddb_dma_pool' double freed

Fixes: afaf5a2d341d ("[SCSI] Initial Commit of qla4xxx")
Link: https://lore.kernel.org/r/20191203094421.hw7ex7qr3j2rbsmx@kili.mountain
Signed-off-by: Dan Carpenter 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: qla2xxx: Don't call qlt_async_event twice

2020-01-12T10:24:09+00:00

[ Upstream commit 2c2f4bed9b6299e6430a65a29b5d27b8763fdf25 ]

MBA_PORT_UPDATE generates duplicate log lines in target mode because
qlt_async_event is called twice. Drop the calls within the case as the
function will be called right after the switch statement.

Cc: Quinn Tran 
Link: https://lore.kernel.org/r/20191125165702.1013-8-r.bolshakov@yadro.com
Acked-by: Himanshu Madhani 
Reviewed-by: Hannes Reinecke 
Tested-by: Hannes Reinecke 
Acked-by: Himanshu Madhani 
Signed-off-by: Roman Bolshakov 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: lpfc: Fix memory leak on lpfc_bsg_write_ebuf_set func

2020-01-12T10:24:09+00:00

[ Upstream commit 9a1b0b9a6dab452fb0e39fe96880c4faf3878369 ]

When phba->mbox_ext_buf_ctx.seqNum != phba->mbox_ext_buf_ctx.numBuf,
dd_data should be freed before return SLI_CONFIG_HANDLED.

When lpfc_sli_issue_mbox func return fails, pmboxq should be also freed in
job_error tag.

Link: https://lore.kernel.org/r/EDBAAA0BBBA2AC4E9C8B6B81DEEE1D6915E7A966@DGGEML525-MBS.china.huawei.com
Signed-off-by: Bo Wu 
Reviewed-by: Zhiqiang Liu 
Reviewed-by: James Smart 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: scsi_debug: num_tgts must be >= 0

2020-01-04T12:41:00+00:00

[ Upstream commit aa5334c4f3014940f11bf876e919c956abef4089 ]

Passing the parameter "num_tgts=-1" will start an infinite loop that
exhausts the system memory

Link: https://lore.kernel.org/r/20191115163727.24626-1-mlombard@redhat.com
Signed-off-by: Maurizio Lombardi 
Acked-by: Douglas Gilbert 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: pm80xx: Fix for SATA device discovery

2020-01-04T12:40:59+00:00

[ Upstream commit ce21c63ee995b7a8b7b81245f2cee521f8c3c220 ]

Driver was missing complete() call in mpi_sata_completion which result in
SATA abort error handling timing out. That causes the device to be left in
the in_recovery state so subsequent commands sent to the device fail and
the OS removes access to it.

Link: https://lore.kernel.org/r/20191114100910.6153-2-deepak.ukey@microchip.com
Acked-by: Jack Wang 
Signed-off-by: peter chang 
Signed-off-by: Deepak Ukey 
Signed-off-by: Viswas G 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: atari_scsi: sun3_scsi: Set sg_tablesize to 1 instead of SG_NONE

2020-01-04T12:40:54+00:00

[ Upstream commit 79172ab20bfd8437b277254028efdb68484e2c21 ]

Since the scsi subsystem adopted the blk-mq API, a host with zero
sg_tablesize crashes with a NULL pointer dereference.

blk_queue_max_segments: set to minimum 1
scsi 0:0:0:0: Direct-Access     QEMU     QEMU HARDDISK    2.5+ PQ: 0 ANSI: 5
scsi target0:0:0: Beginning Domain Validation
scsi target0:0:0: Domain Validation skipping write tests
scsi target0:0:0: Ending Domain Validation
blk_queue_max_segments: set to minimum 1
scsi 0:0:1:0: Direct-Access     QEMU     QEMU HARDDISK    2.5+ PQ: 0 ANSI: 5
scsi target0:0:1: Beginning Domain Validation
scsi target0:0:1: Domain Validation skipping write tests
scsi target0:0:1: Ending Domain Validation
blk_queue_max_segments: set to minimum 1
scsi 0:0:2:0: CD-ROM            QEMU     QEMU CD-ROM      2.5+ PQ: 0 ANSI: 5
scsi target0:0:2: Beginning Domain Validation
scsi target0:0:2: Domain Validation skipping write tests
scsi target0:0:2: Ending Domain Validation
blk_queue_max_segments: set to minimum 1
blk_queue_max_segments: set to minimum 1
blk_queue_max_segments: set to minimum 1
blk_queue_max_segments: set to minimum 1
sr 0:0:2:0: Power-on or device reset occurred
sd 0:0:0:0: Power-on or device reset occurred
sd 0:0:1:0: Power-on or device reset occurred
sd 0:0:0:0: [sda] 10485762 512-byte logical blocks: (5.37 GB/5.00 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Unable to handle kernel NULL pointer dereference at virtual address (ptrval)
Oops: 00000000
Modules linked in:
PC: [<001cd874>] blk_mq_free_request+0x66/0xe2
SR: 2004  SP: (ptrval)  a2: 00874520
d0: 00000000    d1: 00000000    d2: 009ba800    d3: 00000000
d4: 00000000    d5: 08000002    a0: 0087be68    a1: 009a81e0
Process kworker/u2:2 (pid: 15, task=(ptrval))
Frame format=7 eff addr=0000007a ssw=0505 faddr=0000007a
wb 1 stat/addr/data: 0000 00000000 00000000
wb 2 stat/addr/data: 0000 00000000 00000000
wb 3 stat/addr/data: 0000 0000007a 00000000
push data: 00000000 00000000 00000000 00000000
Stack from 0087bd98:
        00000002 00000000 0087be72 009a7820 0087bdb4 001c4f6c 009a7820 0087bdd4
        0024d200 009a7820 0024d0dc 0087be72 009baa00 0087be68 009a5000 0087be7c
        00265d10 009a5000 0087be72 00000003 00000000 00000000 00000000 0087be68
        00000bb8 00000005 00000000 00000000 00000000 00000000 00265c56 00000000
        009ba60c 0036ddf4 00000002 ffffffff 009baa00 009ba600 009a50d6 0087be74
        00227ba0 009baa08 00000001 009baa08 009ba60c 0036ddf4 00000000 00000000
Call Trace: [<001c4f6c>] blk_put_request+0xe/0x14
 [<0024d200>] __scsi_execute+0x124/0x174
 [<0024d0dc>] __scsi_execute+0x0/0x174
 [<00265d10>] sd_revalidate_disk+0xba/0x1f02
 [<00265c56>] sd_revalidate_disk+0x0/0x1f02
 [<0036ddf4>] strlen+0x0/0x22
 [<00227ba0>] device_add+0x3da/0x604
 [<0036ddf4>] strlen+0x0/0x22
 [<00267e64>] sd_probe+0x30c/0x4b4
 [<0002da44>] process_one_work+0x0/0x402
 [<0022b978>] really_probe+0x226/0x354
 [<0022bc34>] driver_probe_device+0xa4/0xf0
 [<0002da44>] process_one_work+0x0/0x402
 [<0022bcd0>] __driver_attach_async_helper+0x50/0x70
 [<00035dae>] async_run_entry_fn+0x36/0x130
 [<0002db88>] process_one_work+0x144/0x402
 [<0002e1aa>] worker_thread+0x0/0x570
 [<0002e29a>] worker_thread+0xf0/0x570
 [<0002e1aa>] worker_thread+0x0/0x570
 [<003768d8>] schedule+0x0/0xb8
 [<0003f58c>] __init_waitqueue_head+0x0/0x12
 [<00033e92>] kthread+0xc2/0xf6
 [<000331e8>] kthread_parkme+0x0/0x4e
 [<003768d8>] schedule+0x0/0xb8
 [<00033dd0>] kthread+0x0/0xf6
 [<00002c10>] ret_from_kernel_thread+0xc/0x14
Code: 0280 0006 0800 56c0 4400 0280 0000 00ff <52b4> 0c3a 082b 0006 0013 6706 2042 53a8 00c4 4ab9 0047 3374 6640 202d 000c 670c
Disabling lock debugging due to kernel taint

Avoid this by setting sg_tablesize = 1.

Link: https://lore.kernel.org/r/4567bcae94523b47d6f3b77450ba305823bca479.1572656814.git.fthain@telegraphics.com.au
Reported-and-tested-by: Michael Schmitz 
Reviewed-by: Michael Schmitz 
References: commit 68ab2d76e4be ("scsi: cxlflash: Set sg_tablesize to 1 instead of SG_NONE")
Signed-off-by: Finn Thain 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: ufs: fix potential bug which ends in system hang

2020-01-04T12:40:52+00:00

[ Upstream commit cfcbae3895b86c390ede57b2a8f601dd5972b47b ]

In function __ufshcd_query_descriptor(), in the event of an error
happening, we directly goto out_unlock and forget to invaliate
hba->dev_cmd.query.descriptor pointer. This results in this pointer still
valid in ufshcd_copy_query_response() for other query requests which go
through ufshcd_exec_raw_upiu_cmd(). This will cause __memcpy() crash and
system hangs. Log as shown below:

Unable to handle kernel paging request at virtual address
ffff000012233c40
Mem abort info:
   ESR = 0x96000047
   Exception class = DABT (current EL), IL = 32 bits
   SET = 0, FnV = 0
   EA = 0, S1PTW = 0
Data abort info:
   ISV = 0, ISS = 0x00000047
   CM = 0, WnR = 1
swapper pgtable: 4k pages, 48-bit VAs, pgdp = 0000000028cc735c
[ffff000012233c40] pgd=00000000bffff003, pud=00000000bfffe003,
pmd=00000000ba8b8003, pte=0000000000000000
 Internal error: Oops: 96000047 [#2] PREEMPT SMP
 ...
 Call trace:
  __memcpy+0x74/0x180
  ufshcd_issue_devman_upiu_cmd+0x250/0x3c0
  ufshcd_exec_raw_upiu_cmd+0xfc/0x1a8
  ufs_bsg_request+0x178/0x3b0
  bsg_queue_rq+0xc0/0x118
  blk_mq_dispatch_rq_list+0xb0/0x538
  blk_mq_sched_dispatch_requests+0x18c/0x1d8
  __blk_mq_run_hw_queue+0xb4/0x118
  blk_mq_run_work_fn+0x28/0x38
  process_one_work+0x1ec/0x470
  worker_thread+0x48/0x458
  kthread+0x130/0x138
  ret_from_fork+0x10/0x1c
 Code: 540000ab a8c12027 a88120c7 a8c12027 (a88120c7)
 ---[ end trace 793e1eb5dff69f2d ]---
 note: kworker/0:2H[2054] exited with preempt_count 1

This patch is to move "descriptor = NULL" down to below the label
"out_unlock".

Fixes: d44a5f98bb49b2(ufs: query descriptor API)
Link: https://lore.kernel.org/r/20191112223436.27449-3-huobean@gmail.com
Reviewed-by: Alim Akhtar 
Reviewed-by: Bart Van Assche 
Signed-off-by: Bean Huo 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin

scsi: lpfc: fix: Coverity: lpfc_cmpl_els_rsp(): Null pointer dereferences

2020-01-04T12:40:51+00:00

[ Upstream commit 6c6d59e0fe5b86cf273d6d744a6a9768c4ecc756 ]

Coverity reported the following:

*** CID 101747:  Null pointer dereferences  (FORWARD_NULL)
/drivers/scsi/lpfc/lpfc_els.c: 4439 in lpfc_cmpl_els_rsp()
4433     			kfree(mp);
4434     		}
4435     		mempool_free(mbox, phba->mbox_mem_pool);
4436     	}
4437     out:
4438     	if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
vvv     CID 101747:  Null pointer dereferences  (FORWARD_NULL)
vvv     Dereferencing null pointer "shost".
4439     		spin_lock_irq(shost->host_lock);
4440     		ndlp->nlp_flag &= ~(NLP_ACC_REGLOGIN | NLP_RM_DFLT_RPI);
4441     		spin_unlock_irq(shost->host_lock);
4442
4443     		/* If the node is not being used by another discovery thread,
4444     		 * and we are sending a reject, we are done with it.

Fix by adding a check for non-null shost in line 4438.
The scenario when shost is set to null is when ndlp is null.
As such, the ndlp check present was sufficient. But better safe
than sorry so add the shost check.

Reported-by: coverity-bot 
Addresses-Coverity-ID: 101747 ("Null pointer dereferences")
Fixes: 2e0fef85e098 ("[SCSI] lpfc: NPIV: split ports")

CC: James Bottomley 
CC: "Gustavo A. R. Silva" 
CC: linux-next@vger.kernel.org
Link: https://lore.kernel.org/r/20191111230401.12958-3-jsmart2021@gmail.com
Reviewed-by: Ewan D. Milne 
Signed-off-by: Dick Kennedy 
Signed-off-by: James Smart 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin