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fix memory leak in macos ipv6/dns helper (#2030)

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Co-authored-by: Grant Limberg <glimberg@users.noreply.github.com>
This commit is contained in:
Travis LaDuke 2023-07-06 12:32:10 -07:00 committed by GitHub
parent 1ce08a62a9
commit 6540107ccb
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 22 additions and 20 deletions
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42
osdep/MacDNSHelper.mm
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@ -122,21 +122,16 @@ bool MacDNSHelper::addIps(uint64_t nwid, const MAC mac, const char *dev, const s
CFStringRef key = CFStringCreateWithCString(NULL, buf, kCFStringEncodingUTF8);
CFStringRef* cfaddrs = new CFStringRef[1];
CFStringRef* cfprefixes = new CFStringRef[1];
CFStringRef* cfdestaddrs = new CFStringRef[1];
CFStringRef* cfflags = new CFStringRef[1];
CFStringRef cfaddr = CFStringCreateWithCString(NULL, llStr, kCFStringEncodingUTF8);
CFStringRef cfprefixes = CFStringCreateWithCString(NULL, "64", kCFStringEncodingUTF8);
CFStringRef cfdestaddrs = CFStringCreateWithCString(NULL, "::ffff:ffff:ffff:ffff:0:0", kCFStringEncodingUTF8);
CFStringRef cfflags = CFStringCreateWithCString(NULL, "0", kCFStringEncodingUTF8);
cfaddrs[0] = CFStringCreateWithCString(NULL, llStr, kCFStringEncodingUTF8);
cfprefixes[0] = CFStringCreateWithCString(NULL, "64", kCFStringEncodingUTF8);
cfdestaddrs[0] = CFStringCreateWithCString(NULL, "::ffff:ffff:ffff:ffff:0:0", kCFStringEncodingUTF8);
cfflags[0] = CFStringCreateWithCString(NULL, "0", kCFStringEncodingUTF8);
CFArrayRef addrArray = CFArrayCreate(NULL, (const void**)cfaddrs, 1, &kCFTypeArrayCallBacks);
CFArrayRef prefixArray = CFArrayCreate(NULL, (const void**)cfprefixes, 1, &kCFTypeArrayCallBacks);
CFArrayRef destArray = CFArrayCreate(NULL, (const void**)cfdestaddrs, 1, &kCFTypeArrayCallBacks);
CFArrayRef flagsArray = CFArrayCreate(NULL, (const void**)cfflags, 1, &kCFTypeArrayCallBacks);
CFArrayRef addrArray = CFArrayCreate(NULL, (const void**)&cfaddr, 1, &kCFTypeArrayCallBacks);
CFArrayRef prefixArray = CFArrayCreate(NULL, (const void**)&cfprefixes, 1, &kCFTypeArrayCallBacks);
CFArrayRef destArray = CFArrayCreate(NULL, (const void**)&cfdestaddrs, 1, &kCFTypeArrayCallBacks);
CFArrayRef flagsArray = CFArrayCreate(NULL, (const void**)&cfflags, 1, &kCFTypeArrayCallBacks);
CFStringRef cfdev = CFStringCreateWithCString(NULL, dev, kCFStringEncodingUTF8);
const int SIZE = 5;
@ -182,6 +177,14 @@ bool MacDNSHelper::addIps(uint64_t nwid, const MAC mac, const char *dev, const s
fprintf(stderr, "Error writing IPv6 configuration\n");
}
}
if (oldAddrs != NULL) {
CFRelease(oldAddrs);
}
CFRelease(cfaddr);
CFRelease(cfprefixes);
CFRelease(cfdestaddrs);
CFRelease(cfflags);
CFRelease(addrArray);
CFRelease(prefixArray);
@ -189,16 +192,15 @@ bool MacDNSHelper::addIps(uint64_t nwid, const MAC mac, const char *dev, const s
CFRelease(flagsArray);
CFRelease(cfdev);
CFRelease(list);
CFRelease(dict);
CFRelease(ds);
CFRelease(key);
delete[] cfaddrs;
delete[] cfprefixes;
delete[] cfdestaddrs;
delete[] cfflags;
// for (unsigned int i = 0; i < SIZE; ++i) {
// values[i] = NULL;
// }
CFRelease(list);
CFRelease(dict);
return ret;
}