From edd003b62af802fae7828336628adb0ea3f6bd21 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Wed, 1 Oct 2014 22:05:51 +0200 Subject: lib/nfs/Connection: fix memory leak when cancelling Open() Close the newly allocated file handle passed to the callback. --- src/lib/nfs/Connection.cxx | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'src/lib/nfs/Connection.cxx') diff --git a/src/lib/nfs/Connection.cxx b/src/lib/nfs/Connection.cxx index 89ef24312..853cacc9a 100644 --- a/src/lib/nfs/Connection.cxx +++ b/src/lib/nfs/Connection.cxx @@ -94,6 +94,14 @@ NfsConnection::CancellableCallback::Callback(int err, void *data) cb.OnNfsError(Error(nfs_domain, err, (const char *)data)); } else { + if (open) { + /* a nfs_open_async() call was cancelled - to + avoid a memory leak, close the newly + allocated file handle immediately */ + struct nfsfh *fh = (struct nfsfh *)data; + connection.Close(fh); + } + connection.callbacks.Remove(*this); } } @@ -157,7 +165,7 @@ NfsConnection::Open(const char *path, int flags, NfsCallback &callback, { assert(!callbacks.Contains(callback)); - auto &c = callbacks.Add(callback, *this); + auto &c = callbacks.Add(callback, *this, true); if (!c.Open(context, path, flags, error)) { callbacks.Remove(c); return false; @@ -172,7 +180,7 @@ NfsConnection::Stat(struct nfsfh *fh, NfsCallback &callback, Error &error) { assert(!callbacks.Contains(callback)); - auto &c = callbacks.Add(callback, *this); + auto &c = callbacks.Add(callback, *this, false); if (!c.Stat(context, fh, error)) { callbacks.Remove(c); return false; @@ -188,7 +196,7 @@ NfsConnection::Read(struct nfsfh *fh, uint64_t offset, size_t size, { assert(!callbacks.Contains(callback)); - auto &c = callbacks.Add(callback, *this); + auto &c = callbacks.Add(callback, *this, false); if (!c.Read(context, fh, offset, size, error)) { callbacks.Remove(c); return false; -- cgit v1.2.3