Fix: filter error path could free invalid ptr

[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 7d62757477febbcddd0a88e8f4524d74c74682a9..1cf7cb5c3cf0324048c7d360980564494eb1450e 100644 (file)
--- a/src/lib/lttng-ctl/filter/filter-visitor-generate-bytecode.c
+++ b/src/lib/lttng-ctl/filter/filter-visitor-generate-bytecode.c
@@ -520,6 +520,10 @@ int recursive_visit_gen_bytecode(struct filter_parser_ctx *ctx,
 LTTNG_HIDDEN
 void filter_bytecode_free(struct filter_parser_ctx *ctx)
 {
+       if (!ctx) {
+               return;
+       }
+
        if (ctx->bytecode) {
                free(ctx->bytecode);
                ctx->bytecode = NULL;