80 lines
3.0 KiB
Diff
80 lines
3.0 KiB
Diff
From f158b6573ac39bdd1ba36c3900e65afffe57f3ca Mon Sep 17 00:00:00 2001
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Message-ID: <f158b6573ac39bdd1ba36c3900e65afffe57f3ca.1689974710.git.jdenemar@redhat.com>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Wed, 19 Jul 2023 15:22:22 +0200
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Subject: [PATCH] node_device: Don't leak error message buffer from
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virMdevctlListDefined|Active
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nodeDeviceUpdateMediatedDevices invokes virMdevctlListDefined and
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virMdevctlListActive both of which were passed the same 'errmsg' buffer.
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Since virCommandSetErrorBuffer() always allocates the error buffer one
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of them was leaked.
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Fix it by populating the 'errmsg' buffer only on failure of
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virMdevctlListActive|Defined which invoke the command.
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Add a comment to nodeDeviceGetMdevctlListCommand reminding how
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virCommandSetErrorBuffer() works.
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Fixes: 44a0f2f0c8f
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
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Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2143158
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(cherry picked from commit 7ca777cc09242cb3a30b12d5e0e396c6aaf1a5e7)
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Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
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---
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src/node_device/node_device_driver.c | 17 +++++++++++++++--
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1 file changed, 15 insertions(+), 2 deletions(-)
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diff --git a/src/node_device/node_device_driver.c b/src/node_device/node_device_driver.c
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index 5dc45ddbb4..2ef9197adc 100644
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--- a/src/node_device/node_device_driver.c
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+++ b/src/node_device/node_device_driver.c
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@@ -1044,6 +1044,15 @@ virMdevctlSetAutostart(virNodeDeviceDef *def, bool autostart, char **errmsg)
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}
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+/**
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+ * nodeDeviceGetMdevctlListCommand:
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+ * @defined: list mdevctl entries with persistent config
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+ * @output: filled with the output of mdevctl once invoked
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+ * @errmsg: always allocated, optionally filled with error from 'mdevctl'
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+ *
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+ * Prepares a virCommand structure to invoke 'mdevctl' caller is responsible to
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+ * free the buffers which are filled by the virCommand infrastructure.
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+ */
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virCommand*
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nodeDeviceGetMdevctlListCommand(bool defined,
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char **output,
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@@ -1624,9 +1633,11 @@ virMdevctlListDefined(virNodeDeviceDef ***devs, char **errmsg)
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{
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int status;
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g_autofree char *output = NULL;
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- g_autoptr(virCommand) cmd = nodeDeviceGetMdevctlListCommand(true, &output, errmsg);
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+ g_autofree char *errbuf = NULL;
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+ g_autoptr(virCommand) cmd = nodeDeviceGetMdevctlListCommand(true, &output, &errbuf);
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if (virCommandRun(cmd, &status) < 0 || status != 0) {
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+ *errmsg = g_steal_pointer(&errbuf);
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return -1;
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}
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@@ -1642,9 +1653,11 @@ virMdevctlListActive(virNodeDeviceDef ***devs, char **errmsg)
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{
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int status;
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g_autofree char *output = NULL;
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- g_autoptr(virCommand) cmd = nodeDeviceGetMdevctlListCommand(false, &output, errmsg);
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+ g_autofree char *errbuf = NULL;
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+ g_autoptr(virCommand) cmd = nodeDeviceGetMdevctlListCommand(false, &output, &errbuf);
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if (virCommandRun(cmd, &status) < 0 || status != 0) {
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+ *errmsg = g_steal_pointer(&errbuf);
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return -1;
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}
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--
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2.41.0
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