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From 0e91f4dc214d01e9d9537b1111ce67010530fd20 Mon Sep 17 00:00:00 2001
Message-Id: <0e91f4dc214d01e9d9537b1111ce67010530fd20@dist-git>
From: Tim Shearer <TShearer@adva.com>
Date: Mon, 1 May 2023 13:15:48 +0000
Subject: [PATCH] virpci: Resolve leak in virPCIVirtualFunctionList cleanup
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Repeatedly querying an SR-IOV PCI device's capabilities exposes a
memory leak caused by a failure to free the virPCIVirtualFunction
array within the parent struct's g_autoptr cleanup.
Valgrind output after getting a single interface's XML description
1000 times:
==325982== 256,000 bytes in 1,000 blocks are definitely lost in loss record 2,634 of 2,635
==325982== at 0x4C3C096: realloc (vg_replace_malloc.c:1437)
==325982== by 0x59D952D: g_realloc (in /usr/lib64/libglib-2.0.so.0.5600.4)
==325982== by 0x4EE1F52: virReallocN (viralloc.c:52)
==325982== by 0x4EE1FB7: virExpandN (viralloc.c:78)
==325982== by 0x4EE219A: virInsertElementInternal (viralloc.c:183)
==325982== by 0x4EE23B2: virAppendElement (viralloc.c:288)
==325982== by 0x4F65D85: virPCIGetVirtualFunctionsFull (virpci.c:2389)
==325982== by 0x4F65753: virPCIGetVirtualFunctions (virpci.c:2256)
==325982== by 0x505CB75: virNodeDeviceGetPCISRIOVCaps (node_device_conf.c:2969)
==325982== by 0x505D181: virNodeDeviceGetPCIDynamicCaps (node_device_conf.c:3099)
==325982== by 0x505BC4E: virNodeDeviceUpdateCaps (node_device_conf.c:2677)
==325982== by 0x260FCBB2: nodeDeviceGetXMLDesc (node_device_driver.c:355)
Signed-off-by: Tim Shearer <tshearer@adva.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
(cherry picked from commit 6425a311b8ad19d6f9c0b315bf1d722551ea3585)
https://bugzilla.redhat.com/show_bug.cgi?id=2196351
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-2700
Signed-off-by: Ján Tomko <jtomko@redhat.com>
---
src/util/virpci.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/util/virpci.c b/src/util/virpci.c
index 4949d1a3d4..2714d11a7d 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -2255,6 +2255,7 @@ virPCIVirtualFunctionListFree(virPCIVirtualFunctionList *list)
g_free(list->functions[i].ifname);
}
+ g_free(list->functions);
g_free(list);
}
--
2.40.1
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