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IB/hfi1: Call kobject_put() when kobject_init_and_add() fails 

When kobject_init_and_add() returns an error in the function
hfi1_create_port_files(), the function kobject_put() is not called for the
corresponding kobject, which potentially leads to memory leak.

This patch fixes the issue by calling kobject_put() even if
kobject_init_and_add() fails.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200326163813.21129.44280.stgit@awfm-01.aw.intel.com
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Kaike Wan 2020-03-26 12:38:14 -04:00 committed by Jason Gunthorpe
parent 5c15abc432
commit dfb5394f80
1 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/infiniband/hw/hfi1/sysfs.c
View File

@ -674,7 +674,11 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping sc2vl sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail;
/*
* Based on the documentation for kobject_init_and_add(), the
* caller should call kobject_put even if this call fails.
*/
goto bail_sc2vl;
}
kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);
@ -684,7 +688,7 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping sl2sc sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_sc2vl;
goto bail_sl2sc;
}
kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);
@ -694,7 +698,7 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping vl2mtu sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_sl2sc;
goto bail_vl2mtu;
}
kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);
@ -704,7 +708,7 @@ int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
dd_dev_err(dd,
"Skipping Congestion Control sysfs info, (err %d) port %u\n",
ret, port_num);
goto bail_vl2mtu;
goto bail_cc;
}
kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
@ -742,7 +746,6 @@ bail_sl2sc:
kobject_put(&ppd->sl2sc_kobj);
bail_sc2vl:
kobject_put(&ppd->sc2vl_kobj);
bail:
return ret;
}