log: Fix size calculation for number of iovecs

Each log context field can expand to up to three iovecs (key, value
and newline) so let's fix the size calculation to take this into
account.

diff --git a/src/basic/log.c b/src/basic/log.c
index 09500f9cb05201f986d12e3f153dabae8e61ccfa..571f5e43dce5b3190cb0fc184447ba66a62c1061 100644 (file)
--- a/src/basic/log.c
+++ b/src/basic/log.c
@@ -747,7 +747,7 @@ static int write_to_journal(
         if (LOG_PRI(level) > log_target_max_level[LOG_TARGET_JOURNAL])
                 return 0;
 
-        iovec_len = MIN(6 + _log_context_num_fields * 2, IOVEC_MAX);
+        iovec_len = MIN(6 + _log_context_num_fields * 3, IOVEC_MAX);
         iovec = newa(struct iovec, iovec_len);
 
         log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object, extra_field, extra);
@@ -1099,7 +1099,7 @@ int log_struct_internal(
                         int r;
                         bool fallback = false;
 
-                        iovec_len = MIN(17 + _log_context_num_fields * 2, IOVEC_MAX);
+                        iovec_len = MIN(17 + _log_context_num_fields * 3, IOVEC_MAX);
                         iovec = newa(struct iovec, iovec_len);
 
                         /* If the journal is available do structured logging.
@@ -1196,7 +1196,7 @@ int log_struct_iovec_internal(
                 struct iovec *iovec;
                 size_t n = 0, iovec_len;
 
-                iovec_len = MIN(1 + n_input_iovec * 2 + _log_context_num_fields * 2, IOVEC_MAX);
+                iovec_len = MIN(1 + n_input_iovec * 2 + _log_context_num_fields * 3, IOVEC_MAX);
                 iovec = newa(struct iovec, iovec_len);
 
                 log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);