mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-22 08:01:31 +07:00
823a65409c
When an rport event (RPORT_EV_READY) is updated without work being queued,
avoid taking an additional reference.
This issue was leading to memory leak. Trace from KMEMLEAK tool:
unreferenced object 0xffff8888259e8780 (size 512):
comm "kworker/2:1", jiffies 4433237386 (age 113021.971s)
hex dump (first 32 bytes):
58 0a ec cf 83 88 ff ff 00 00 00 00 00 00 00 00
01 00 00 00 08 00 00 00 13 7d f0 1e 0e 00 00 10
backtrace:
[<000000006b25760f>] fc_rport_recv_req+0x3c6/0x18f0 [libfc]
[<00000000f208d994>] fc_lport_recv_els_req+0x120/0x8a0 [libfc]
[<00000000a9c437b8>] fc_lport_recv+0xb9/0x130 [libfc]
[<00000000a9c437b8>] fc_lport_recv+0xb9/0x130 [libfc]
[<00000000ad5be37b>] qedf_ll2_process_skb+0x73d/0xad0 [qedf]
[<00000000e0eb6893>] process_one_work+0x382/0x6c0
[<000000002dfd9e21>] worker_thread+0x57/0x5c0
[<00000000b648204f>] kthread+0x1a0/0x1c0
[<0000000072f5ab20>] ret_from_fork+0x35/0x40
[<000000001d5c05d8>] 0xffffffffffffffff
Below is the log sequence which leads to memory leak. Here we get the
RPORT_EV_READY and RPORT_EV_STOP back to back, which lead to overwrite the
event RPORT_EV_READY by event RPORT_EV_STOP. Because of this, kref_count
gets incremented by 1.
kernel: host0: rport fffce5: Received PLOGI request
kernel: host0: rport fffce5: Received PLOGI in INIT state
kernel: host0: rport fffce5: Port is Ready
kernel: host0: rport fffce5: Received PRLI request while in state Ready
kernel: host0: rport fffce5: PRLI rspp type 8 active 1 passive 0
kernel: host0: rport fffce5: Received LOGO request while in state Ready
kernel: host0: rport fffce5: Delete port
kernel: host0: rport fffce5: Received PLOGI request
kernel: host0: rport fffce5: Received PLOGI in state Delete - send busy
kernel: host0: rport fffce5: work event 3
kernel: host0: rport fffce5: lld callback ev 3
kernel: host0: rport fffce5: work delete
Link: https://lore.kernel.org/r/20200626094959.32151-1-jhasan@marvell.com
Reviewed-by: Girish Basrur <gbasrur@marvell.com>
Reviewed-by: Saurav Kashyap <skashyap@marvell.com>
Reviewed-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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|---|---|---|
| .. | ||
| aacraid | ||
| aic7xxx | ||
| aic94xx | ||
| arcmsr | ||
| arm | ||
| be2iscsi | ||
| bfa | ||
| bnx2fc | ||
| bnx2i | ||
| csiostor | ||
| cxgbi | ||
| cxlflash | ||
| device_handler | ||
| dpt | ||
| esas2r | ||
| fcoe | ||
| fnic | ||
| hisi_sas | ||
| ibmvscsi | ||
| ibmvscsi_tgt | ||
| isci | ||
| libfc | ||
| libsas | ||
| lpfc | ||
| megaraid | ||
| mpt3sas | ||
| mvsas | ||
| pcmcia | ||
| pm8001 | ||
| qedf | ||
| qedi | ||
| qla2xxx | ||
| qla4xxx | ||
| smartpqi | ||
| snic | ||
| sym53c8xx_2 | ||
| ufs | ||
| .gitignore | ||
| 3w-9xxx.c | ||
| 3w-9xxx.h | ||
| 3w-sas.c | ||
| 3w-sas.h | ||
| 3w-xxxx.c | ||
| 3w-xxxx.h | ||
| 53c700_d.h_shipped | ||
| 53c700.c | ||
| 53c700.h | ||
| 53c700.scr | ||
| a100u2w.c | ||
| a100u2w.h | ||
| a2091.c | ||
| a2091.h | ||
| a3000.c | ||
| a3000.h | ||
| a4000t.c | ||
| advansys.c | ||
| aha152x.c | ||
| aha152x.h | ||
| aha1542.c | ||
| aha1542.h | ||
| aha1740.c | ||
| aha1740.h | ||
| am53c974.c | ||
| atari_scsi.c | ||
| atp870u.c | ||
| atp870u.h | ||
| BusLogic.c | ||
| BusLogic.h | ||
| bvme6000_scsi.c | ||
| ch.c | ||
| constants.c | ||
| dc395x.c | ||
| dc395x.h | ||
| dmx3191d.c | ||
| dpt_i2o.c | ||
| dpti.h | ||
| esp_scsi.c | ||
| esp_scsi.h | ||
| fdomain_isa.c | ||
| fdomain_pci.c | ||
| fdomain.c | ||
| fdomain.h | ||
| FlashPoint.c | ||
| g_NCR5380.c | ||
| gdth_ioctl.h | ||
| gdth_proc.c | ||
| gdth_proc.h | ||
| gdth.c | ||
| gdth.h | ||
| gvp11.c | ||
| gvp11.h | ||
| hosts.c | ||
| hpsa_cmd.h | ||
| hpsa.c | ||
| hpsa.h | ||
| hptiop.c | ||
| hptiop.h | ||
| imm.c | ||
| imm.h | ||
| initio.c | ||
| initio.h | ||
| ipr.c | ||
| ipr.h | ||
| ips.c | ||
| ips.h | ||
| iscsi_boot_sysfs.c | ||
| iscsi_tcp.c | ||
| iscsi_tcp.h | ||
| jazz_esp.c | ||
| Kconfig | ||
| lasi700.c | ||
| libiscsi_tcp.c | ||
| libiscsi.c | ||
| mac53c94.c | ||
| mac53c94.h | ||
| mac_esp.c | ||
| mac_scsi.c | ||
| Makefile | ||
| megaraid.c | ||
| megaraid.h | ||
| mesh.c | ||
| mesh.h | ||
| mvme16x_scsi.c | ||
| mvme147.c | ||
| mvme147.h | ||
| mvumi.c | ||
| mvumi.h | ||
| myrb.c | ||
| myrb.h | ||
| myrs.c | ||
| myrs.h | ||
| ncr53c8xx.c | ||
| ncr53c8xx.h | ||
| NCR5380.c | ||
| NCR5380.h | ||
| nsp32_debug.c | ||
| nsp32_io.h | ||
| nsp32.c | ||
| nsp32.h | ||
| pmcraid.c | ||
| pmcraid.h | ||
| ppa.c | ||
| ppa.h | ||
| ps3rom.c | ||
| qla1280.c | ||
| qla1280.h | ||
| qlogicfas408.c | ||
| qlogicfas408.h | ||
| qlogicfas.c | ||
| qlogicpti.c | ||
| qlogicpti.h | ||
| raid_class.c | ||
| script_asm.pl | ||
| scsi_common.c | ||
| scsi_debug.c | ||
| scsi_debugfs.c | ||
| scsi_debugfs.h | ||
| scsi_devinfo.c | ||
| scsi_dh.c | ||
| scsi_error.c | ||
| scsi_ioctl.c | ||
| scsi_lib_dma.c | ||
| scsi_lib.c | ||
| scsi_logging.c | ||
| scsi_logging.h | ||
| scsi_netlink.c | ||
| scsi_pm.c | ||
| scsi_priv.h | ||
| scsi_proc.c | ||
| scsi_sas_internal.h | ||
| scsi_scan.c | ||
| scsi_sysctl.c | ||
| scsi_sysfs.c | ||
| scsi_trace.c | ||
| scsi_transport_api.h | ||
| scsi_transport_fc.c | ||
| scsi_transport_iscsi.c | ||
| scsi_transport_sas.c | ||
| scsi_transport_spi.c | ||
| scsi_transport_srp.c | ||
| scsi.c | ||
| scsi.h | ||
| scsicam.c | ||
| sd_dif.c | ||
| sd_zbc.c | ||
| sd.c | ||
| sd.h | ||
| sense_codes.h | ||
| ses.c | ||
| sg.c | ||
| sgiwd93.c | ||
| sim710.c | ||
| sni_53c710.c | ||
| sr_ioctl.c | ||
| sr_vendor.c | ||
| sr.c | ||
| sr.h | ||
| st_options.h | ||
| st.c | ||
| st.h | ||
| stex.c | ||
| storvsc_drv.c | ||
| sun3_scsi_vme.c | ||
| sun3_scsi.c | ||
| sun3x_esp.c | ||
| sun_esp.c | ||
| virtio_scsi.c | ||
| vmw_pvscsi.c | ||
| vmw_pvscsi.h | ||
| wd33c93.c | ||
| wd33c93.h | ||
| wd719x.c | ||
| wd719x.h | ||
| xen-scsifront.c | ||
| zalon.c | ||
| zorro7xx.c | ||
| zorro_esp.c | ||