[libvirt] [PATCH] virNetlinkDumpCommand: Don't leak response buffer
==16451== 32,768 bytes in 2 blocks are definitely lost in loss record 1,007 of 1,013 ==16451== at 0x4C2AF0F: malloc (vg_replace_malloc.c:299) ==16451== by 0x7CADB40: nl_recv (in /usr/lib64/libnl-3.so.200.23.0) ==16451== by 0x532DFAC: virNetlinkDumpCommand (virnetlink.c:363) ==16451== by 0x53236AE: virNetDevIPCheckIPv6Forwarding (virnetdevip.c:641) ==16451== by 0xE3E4A1A: networkStartNetworkVirtual (bridge_driver.c:2490) ==16451== by 0xE3E55F5: networkStartNetwork (bridge_driver.c:2832) ==16451== by 0xE3DFFE5: networkAutostartConfig (bridge_driver.c:531) ==16451== by 0x53F47E0: virNetworkObjListForEachHelper (virnetworkobj.c:1412) ==16451== by 0x52FE69F: virHashForEach (virhash.c:606) ==16451== by 0x53F4857: virNetworkObjListForEach (virnetworkobj.c:1439) ==16451== by 0xE3E0BF4: networkStateAutoStart (bridge_driver.c:808) ==16451== by 0x55689CE: virStateInitialize (libvirt.c:758) Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- src/util/virnetlink.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/src/util/virnetlink.c b/src/util/virnetlink.c index 0e281b06b8..955f1558ee 100644 --- a/src/util/virnetlink.c +++ b/src/util/virnetlink.c @@ -360,6 +360,7 @@ virNetlinkDumpCommand(struct nl_msg *nl_msg, goto cleanup; while (!end) { + VIR_FREE(resp); len = nl_recv(nlhandle, &nladdr, (unsigned char **)&resp, NULL); VIR_WARNINGS_NO_CAST_ALIGN for (msg = resp; NLMSG_OK(msg, len); msg = NLMSG_NEXT(msg, len)) { @@ -378,6 +379,7 @@ virNetlinkDumpCommand(struct nl_msg *nl_msg, ret = 0; cleanup: + VIR_FREE(resp); virNetlinkFree(nlhandle); return ret; } -- 2.16.1
On Mon, Mar 19, 2018 at 07:47:08AM +0100, Michal Privoznik wrote:
==16451== 32,768 bytes in 2 blocks are definitely lost in loss record 1,007 of 1,013 ==16451== at 0x4C2AF0F: malloc (vg_replace_malloc.c:299) ==16451== by 0x7CADB40: nl_recv (in /usr/lib64/libnl-3.so.200.23.0) ==16451== by 0x532DFAC: virNetlinkDumpCommand (virnetlink.c:363) ==16451== by 0x53236AE: virNetDevIPCheckIPv6Forwarding (virnetdevip.c:641) ==16451== by 0xE3E4A1A: networkStartNetworkVirtual (bridge_driver.c:2490) ==16451== by 0xE3E55F5: networkStartNetwork (bridge_driver.c:2832) ==16451== by 0xE3DFFE5: networkAutostartConfig (bridge_driver.c:531) ==16451== by 0x53F47E0: virNetworkObjListForEachHelper (virnetworkobj.c:1412) ==16451== by 0x52FE69F: virHashForEach (virhash.c:606) ==16451== by 0x53F4857: virNetworkObjListForEach (virnetworkobj.c:1439) ==16451== by 0xE3E0BF4: networkStateAutoStart (bridge_driver.c:808) ==16451== by 0x55689CE: virStateInitialize (libvirt.c:758)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- src/util/virnetlink.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/src/util/virnetlink.c b/src/util/virnetlink.c index 0e281b06b8..955f1558ee 100644 --- a/src/util/virnetlink.c +++ b/src/util/virnetlink.c @@ -360,6 +360,7 @@ virNetlinkDumpCommand(struct nl_msg *nl_msg, goto cleanup;
while (!end) { + VIR_FREE(resp);
Personally, I'd put this at the end of the loop rather than at the beginning but that's a matter of taste, function-wise it doesn't matter, so Reviewed-by: Erik Skultety <eskultet@redhat.com>
On 03/19/2018 10:13 AM, Erik Skultety wrote:
On Mon, Mar 19, 2018 at 07:47:08AM +0100, Michal Privoznik wrote:
==16451== 32,768 bytes in 2 blocks are definitely lost in loss record 1,007 of 1,013 ==16451== at 0x4C2AF0F: malloc (vg_replace_malloc.c:299) ==16451== by 0x7CADB40: nl_recv (in /usr/lib64/libnl-3.so.200.23.0) ==16451== by 0x532DFAC: virNetlinkDumpCommand (virnetlink.c:363) ==16451== by 0x53236AE: virNetDevIPCheckIPv6Forwarding (virnetdevip.c:641) ==16451== by 0xE3E4A1A: networkStartNetworkVirtual (bridge_driver.c:2490) ==16451== by 0xE3E55F5: networkStartNetwork (bridge_driver.c:2832) ==16451== by 0xE3DFFE5: networkAutostartConfig (bridge_driver.c:531) ==16451== by 0x53F47E0: virNetworkObjListForEachHelper (virnetworkobj.c:1412) ==16451== by 0x52FE69F: virHashForEach (virhash.c:606) ==16451== by 0x53F4857: virNetworkObjListForEach (virnetworkobj.c:1439) ==16451== by 0xE3E0BF4: networkStateAutoStart (bridge_driver.c:808) ==16451== by 0x55689CE: virStateInitialize (libvirt.c:758)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- src/util/virnetlink.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/src/util/virnetlink.c b/src/util/virnetlink.c index 0e281b06b8..955f1558ee 100644 --- a/src/util/virnetlink.c +++ b/src/util/virnetlink.c @@ -360,6 +360,7 @@ virNetlinkDumpCommand(struct nl_msg *nl_msg, goto cleanup;
while (!end) { + VIR_FREE(resp);
Personally, I'd put this at the end of the loop rather than at the beginning but that's a matter of taste, function-wise it doesn't matter, so
Okay, I've moved it at the end of the loop body and pushed. Thanks. Michal
participants (2)
-
Erik Skultety -
Michal Privoznik