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node_device_conf: virNodeDeviceGetSCSITargetCaps: fix memory leak

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Make sure the old value in `scsi_target->wwpn` is free'd before replacing it.
While at it, simplify the code.

==9104== 38 bytes in 2 blocks are definitely lost in loss record 1,943 of 3,250
==9104==    at 0x483B8C0: malloc (vg_replace_malloc.c:442)
==9104==    by 0x4DFB69B: g_malloc (gmem.c:130)
==9104==    by 0x4E1921D: g_strdup (gstrfuncs.c:363)
==9104==    by 0x495D60B: g_strdup_inline (gstrfuncs.h:321)
==9104==    by 0x495D60B: virFCReadRportValue (virfcp.c:62)
==9104==    by 0x4A5F5CB: virNodeDeviceGetSCSITargetCaps (node_device_conf.c:2914)
==9104==    by 0xBF62529: udevProcessSCSITarget (node_device_udev.c:657)
==9104==    by 0xBF62529: udevGetDeviceDetails (node_device_udev.c:1406)
==9104==    by 0xBF62529: udevAddOneDevice (node_device_udev.c:1563)
==9104==    by 0xBF639B5: udevProcessDeviceListEntry (node_device_udev.c:1637)
==9104==    by 0xBF639B5: udevEnumerateDevices (node_device_udev.c:1691)
==9104==    by 0xBF639B5: nodeStateInitializeEnumerate (node_device_udev.c:2009)
==9104==    by 0x49BDBFD: virThreadHelper (virthread.c:256)
==9104==    by 0x5242069: start_thread (in /usr/lib64/libc.so.6)

Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Marc Hartmayer 2024-03-27 17:46:39 +01:00 committed by Michal Privoznik
parent e2a7dd3f7e
commit 5138dd2478
1 changed files with 11 additions and 18 deletions
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29
src/conf/node_device_conf.c
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@ -2894,9 +2894,9 @@ int
virNodeDeviceGetSCSITargetCaps(const char *sysfsPath,
virNodeDevCapSCSITarget *scsi_target)
{
int ret = -1;
g_autofree char *dir = NULL;
g_autofree char *rport = NULL;
g_autofree char *wwpn = NULL;
VIR_DEBUG("Checking if '%s' is an FC remote port", scsi_target->name);
@ -2906,28 +2906,21 @@ virNodeDeviceGetSCSITargetCaps(const char *sysfsPath,
rport = g_path_get_basename(dir);
if (!virFCIsCapableRport(rport))
goto cleanup;
return -1;
if (virFCReadRportValue(rport, "port_name",
&wwpn) < 0) {
VIR_WARN("Failed to read port_name for '%s'", rport);
return -1;
}
VIR_FREE(scsi_target->rport);
scsi_target->rport = g_steal_pointer(&rport);
if (virFCReadRportValue(scsi_target->rport, "port_name",
&scsi_target->wwpn) < 0) {
VIR_WARN("Failed to read port_name for '%s'", scsi_target->rport);
goto cleanup;
}
VIR_FREE(scsi_target->wwpn);
scsi_target->wwpn = g_steal_pointer(&wwpn);
scsi_target->flags |= VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
ret = 0;
cleanup:
if (ret < 0) {
VIR_FREE(scsi_target->rport);
VIR_FREE(scsi_target->wwpn);
scsi_target->flags &= ~VIR_NODE_DEV_CAP_FLAG_FC_RPORT;
}
return ret;
return 0;
}