Fix: avoid freeing invalid ptr in filter bytecode

[lttng-tools.git] / src / lib / lttng-ctl / filter / filter-visitor-generate-bytecode.c

diff --git a/src/lib/lttng-ctl/filter/filter-visitor-generate-bytecode.c b/src/lib/lttng-ctl/filter/filter-visitor-generate-bytecode.c
index 8c6dc96ff236520de23ea0efa7ee7b37f1c20784..7d62757477febbcddd0a88e8f4524d74c74682a9 100644 (file)
--- a/src/lib/lttng-ctl/filter/filter-visitor-generate-bytecode.c
+++ b/src/lib/lttng-ctl/filter/filter-visitor-generate-bytecode.c
@@ -520,10 +520,15 @@ int recursive_visit_gen_bytecode(struct filter_parser_ctx *ctx,
 LTTNG_HIDDEN
 void filter_bytecode_free(struct filter_parser_ctx *ctx)
 {
-       free(ctx->bytecode);
-       ctx->bytecode = NULL;
-       free(ctx->bytecode_reloc);
-       ctx->bytecode_reloc = NULL;
+       if (ctx->bytecode) {
+               free(ctx->bytecode);
+               ctx->bytecode = NULL;
+       }
+
+       if (ctx->bytecode_reloc) {
+               free(ctx->bytecode_reloc);
+               ctx->bytecode_reloc = NULL;
+       }
 }
 
 LTTNG_HIDDEN