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Detect symlink cycles

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Eelco Dolstra 2022-05-18 23:09:12 +02:00
parent 593798b2a0
commit df713a5d25
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2 changed files with 8 additions and 0 deletions
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4
src/libfetchers/input-accessor.cc
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@ -289,10 +289,14 @@ SourcePath SourcePath::resolveSymlinks() const
{
CanonPath res("/");
int linksAllowed = 1024;
for (auto & component : path) {
res.push(component);
while (true) {
if (auto st = accessor.maybeLstat(res)) {
if (!linksAllowed--)
throw Error("infinite symlink recursion in path '%s'", path);
if (st->type != InputAccessor::tSymlink) break;
auto target = accessor.readLink(res);
if (hasPrefix(target, "/"))