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virsh: Null terminated the string memcpy from buffer explicitly
Detected by valgrind: ==16217== 1 errors in context 1 of 12: ==16217== Invalid read of size 1 ==16217== at 0x4A07804: __GI_strlen (mc_replace_strmem.c:284) ==16217== by 0x3019F167F6: xdr_string (in /lib64/libc-2.12.so) ==16217== by 0x3033709E8D: xdr_remote_nonnull_string (remote_protocol.c:31) ==16217== by 0x303370E5CB: xdr_remote_domain_update_device_flags_args (remote_protocol.c:2028) ==16217== by 0x30337197D1: virNetMessageEncodePayload (virnetmessage.c:341) ==16217== by 0x30337135E1: virNetClientProgramCall (virnetclientprogram.c:327) ==16217== by 0x30336F1EFD: callWithFD (remote_driver.c:4586) ==16217== by 0x30336F1F7B: call (remote_driver.c:4607) ==16217== by 0x30336F42F2: remoteDomainUpdateDeviceFlags (remote_client_bodies.h:2865) ==16217== by 0x30336D46E5: virDomainUpdateDeviceFlags (libvirt.c:9457) ==16217== by 0x41AEE8: cmdChangeMedia (virsh.c:15249) ==16217== by 0x413CB4: vshCommandRun (virsh.c:18669) ==16217== Address 0x4ec5e25 is 0 bytes after a block of size 293 alloc'd ==16217== at 0x4A04A28: calloc (vg_replace_malloc.c:467) ==16217== by 0x303364F1DB: virAllocN (memory.c:129) ==16217== by 0x41A844: vshPrepareDiskXML (virsh.c:15043) ==16217== by 0x41AECC: cmdChangeMedia (virsh.c:15246) ==16217== by 0x413CB4: vshCommandRun (virsh.c:18669) ==16217== by 0x423973: main (virsh.c:20261)
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parent
8b36e32c16
commit
e3843d7f04
@ -15085,11 +15085,13 @@ cleanup:
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VIR_FREE(device_type);
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VIR_FREE(disk_type);
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if (xml_buf) {
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if (VIR_ALLOC_N(ret, xmlBufferLength(xml_buf)) < 0) {
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int len = xmlBufferLength(xml_buf);
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if (VIR_ALLOC_N(ret, len + 1) < 0) {
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virReportOOMError();
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return NULL;
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}
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memcpy(ret, (char *)xmlBufferContent(xml_buf), xmlBufferLength(xml_buf));
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memcpy(ret, (char *)xmlBufferContent(xml_buf), len);
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ret[len] = '\0';
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xmlBufferFree(xml_buf);
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}
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return ret;
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