client: skip fscrypt decrypt_bl if data bl is empty.

Fixes: https://tracker.ceph.com/issues/72237
Fixes: https://tracker.ceph.com/issues/72192
Signed-off-by: Christopher Hoffman <choffman@redhat.com>

diff --git a/src/client/FSCrypt.cc b/src/client/FSCrypt.cc
index edb38898affafe252c62e4c0d11ae86449eae9ad..1e10085d8ee8b2cd0c6be5ebacc1fceff3409246 100644 (file)
--- a/src/client/FSCrypt.cc
+++ b/src/client/FSCrypt.cc
@@ -882,6 +882,8 @@ int FSCryptFNameDenc::get_decrypted_symlink(const std::string& b64enc, std::stri
 int FSCryptFDataDenc::decrypt_bl(uint64_t off, uint64_t len, uint64_t pos, const std::vector<Segment>& holes, bufferlist *bl)
 {
   auto data_len = bl->length();
+  if (data_len == 0)
+    return 0;
 
   auto target_end = off + len;