diff --git a/binr/r2r/r2r.c b/binr/r2r/r2r.c
index abc7c58c6e..efa00009b7 100644
--- a/binr/r2r/r2r.c
+++ b/binr/r2r/r2r.c
@@ -80,6 +80,7 @@ static bool r2r_chdir(const char *argv0) {
 	char *r2r_path = r_file_path (argv0);
 	bool found = false;
 	if (readlink (r2r_path, src_path, sizeof (src_path)) != -1) {
+		src_path[sizeof (src_path) - 1] = 0;
 		char *p = strstr (src_path, R_SYS_DIR "binr"R_SYS_DIR"r2r"R_SYS_DIR"r2r");
 		if (p) {
 			*p = 0;
diff --git a/libr/anal/rtti_msvc.c b/libr/anal/rtti_msvc.c
index 589af183b1..46dba5b0a4 100644
--- a/libr/anal/rtti_msvc.c
+++ b/libr/anal/rtti_msvc.c
@@ -807,7 +807,6 @@ RecoveryTypeDescriptor *recovery_anal_type_descriptor(RRTTIMSVCAnalContext *cont
 	return td;
 }
 
-
 static char *unique_class_name(RAnal *anal, const char *original_name) {
 	if (!r_anal_class_exists (anal, original_name)) {
 		return strdup (original_name);
@@ -835,9 +834,7 @@ static void recovery_apply_vtable(RAnal *anal, const char *class_name, RVTableIn
 		return;
 	}
 
-	RAnalVTable vtable;
-	vtable.id = NULL;
-	vtable.offset = 0;
+	RAnalVTable vtable = {0};
 	vtable.addr = vtable_info->saddr;
 	r_anal_class_vtable_set (anal, class_name, &vtable);
 	r_anal_class_vtable_fini (&vtable);
diff --git a/libr/anal/sign.c b/libr/anal/sign.c
index 4a38d3b9a3..613ee73172 100644
--- a/libr/anal/sign.c
+++ b/libr/anal/sign.c
@@ -868,8 +868,8 @@ static RSignBytes *r_sign_fcn_bytes(RAnal *a, RAnalFunction *fcn) {
 	RListIter *iter;
 	r_list_foreach (fcn->bbs, iter, bb) {
 		if (bb->addr >= ea) {
-			ut64 delta = bb->addr - ea;
-			ut64 rsize = bb->size;
+			size_t delta = bb->addr - ea;
+			size_t rsize = bb->size;
 
 			// bounds check
 			if (delta > size) {
@@ -883,7 +883,9 @@ static RSignBytes *r_sign_fcn_bytes(RAnal *a, RAnalFunction *fcn) {
 			if (!(tmpmask = r_anal_mask (a, rsize, sig->bytes + delta, ea))) {
 				goto bytes_failed;
 			}
-			memcpy (sig->mask + delta, tmpmask, rsize);
+			if (rsize > 0) {
+				memcpy (sig->mask + delta, tmpmask, rsize);
+			}
 			free (tmpmask);
 		}
 	}
diff --git a/libr/asm/arch/pyc/opcode_arg_fmt.c b/libr/asm/arch/pyc/opcode_arg_fmt.c
index 5d9aa72d4e..b8266611f4 100644
--- a/libr/asm/arch/pyc/opcode_arg_fmt.c
+++ b/libr/asm/arch/pyc/opcode_arg_fmt.c
@@ -32,7 +32,7 @@ const char *format_MAKE_FUNCTION_arg_36(ut32 oparg) {
 	char *ret = r_str_new (" ");
 	for (i = 0; i < sizeof (MAKE_FUNCTION_FLAGS) / sizeof (char *); ++i) {
 		if (oparg & 0x1) {
-			r_str_appendf (ret, ", %s", MAKE_FUNCTION_FLAGS[i]);
+			ret = r_str_appendf (ret, ", %s", MAKE_FUNCTION_FLAGS[i]);
 		} else {
 			free (ret);
 			ret = r_str_new (MAKE_FUNCTION_FLAGS[i]);
diff --git a/libr/asm/asm.c b/libr/asm/asm.c
index 243fab56bf..528e4f354f 100644
--- a/libr/asm/asm.c
+++ b/libr/asm/asm.c
@@ -1021,6 +1021,7 @@ R_API RAsmCode *r_asm_massemble(RAsm *a, const char *assembly) {
 				if (op.buf_inc && r_buf_size (op.buf_inc) > 1) {
 					char *inc = r_buf_to_string (op.buf_inc);
 					r_buf_free (op.buf_inc);
+					op.buf_inc = NULL;
 					if (inc) {
 						ret += r_hex_str2bin (inc, acode->bytes + idx + ret);
 						free (inc);
diff --git a/libr/bin/p/bin_xnu_kernelcache.c b/libr/bin/p/bin_xnu_kernelcache.c
index b5db11175d..b009721dbf 100644
--- a/libr/bin/p/bin_xnu_kernelcache.c
+++ b/libr/bin/p/bin_xnu_kernelcache.c
@@ -239,6 +239,7 @@ static bool load_buffer(RBinFile *bf, void **bin_obj, RBuffer *buf, ut64 loadadd
 
 beach:
 	r_buf_free (fbuf);
+	obj->cache_buf = NULL;
 	MACH0_(mach0_free) (main_mach0);
 	return false;
 }
@@ -1499,7 +1500,7 @@ static RList *resolve_mig_subsystem(RKernelCacheObj *obj) {
 			continue;
 		}
 
-		ut64 *routines = (ut64 *) malloc (n_routines * sizeof (ut64));
+		ut64 *routines = (ut64 *) calloc (n_routines, sizeof (ut64));
 		if (!routines) {
 			goto beach;
 		}
diff --git a/libr/cons/dietline.c b/libr/cons/dietline.c
index f0758eb912..f1f7ee0b86 100644
--- a/libr/cons/dietline.c
+++ b/libr/cons/dietline.c
@@ -919,7 +919,9 @@ static void __print_prompt(void) {
 	}
 	len = I.buffer.index - i;
 	if (len > 0 && (i + len) <= I.buffer.length) {
-		fwrite (I.buffer.data + i, 1, len, stdout);
+		if (i<I.buffer.length) {
+			fwrite (I.buffer.data + i, 1, len, stdout);
+		}
 	}
 	fflush (stdout);
 }
diff --git a/libr/core/cmd_anal.c b/libr/core/cmd_anal.c
index 69a8651524..c36c011efb 100644
--- a/libr/core/cmd_anal.c
+++ b/libr/core/cmd_anal.c
@@ -4883,7 +4883,7 @@ R_API int r_core_esil_step(RCore *core, ut64 until_addr, const char *until_expr,
 	RAnalOp op = {0};
 	RAnalEsil *esil = core->anal->esil;
 	const char *name = r_reg_get_name (core->anal->reg, R_REG_NAME_PC);
-	ut64 addr;
+	ut64 addr = r_reg_getv (core->anal->reg, name);
 	bool breakoninvalid = r_config_get_i (core->config, "esil.breakoninvalid");
 	int esiltimeout = r_config_get_i (core->config, "esil.timeout");
 	ut64 startTime;
diff --git a/libr/core/cmd_eval.c b/libr/core/cmd_eval.c
index d29589fb0a..1f8f14d45b 100644
--- a/libr/core/cmd_eval.c
+++ b/libr/core/cmd_eval.c
@@ -241,6 +241,7 @@ static void nextpal(RCore *core, int mode) {
 			}
 		}
 		r_list_free (files);
+		files = NULL;
 		R_FREE (home);
 	}
 
diff --git a/libr/core/disasm.c b/libr/core/disasm.c
index d190c11f20..afa64f5c56 100644
--- a/libr/core/disasm.c
+++ b/libr/core/disasm.c
@@ -5795,7 +5795,7 @@ toro:
 			if (ds->immtrim) {
 				free (ds->opstr);
 				ds->opstr = strdup (r_asm_op_get_asm (&ds->asmop));
-				r_parse_immtrim (ds->opstr);
+				ds->opstr = r_parse_immtrim (ds->opstr);
 			}
 		}
 		if (ds->asm_instr) {
diff --git a/libr/core/panels.c b/libr/core/panels.c
index 33c5c5cfcd..a6c8509748 100644
--- a/libr/core/panels.c
+++ b/libr/core/panels.c
@@ -2479,17 +2479,22 @@ static void __set_refresh_by_type(RCore *core, const char *cmd, bool clearCache)
 	}
 }
 
+static char *filter_arg(char *a) {
+	r_name_filter_print (a);
+	char *r = r_str_escape (a);
+	free (a);
+	return r;
+}
+
 static void __handleComment(RCore *core) {
 	RPanel *p = __get_cur_panel (core->panels);
 	if (!__check_panel_type (p, PANEL_CMD_DISASSEMBLY)) {
 		return;
 	}
 	char buf[4095];
-	int i;
+	char *cmd = NULL;
 	r_line_set_prompt ("[Comment]> ");
-	strcpy (buf, "\"CC ");
-	i = strlen (buf);
-	if (r_cons_fgets (buf + i, sizeof (buf) - i, 0, NULL) > 0) {
+	if (r_cons_fgets (buf, sizeof (buf), 0, NULL) > 0) {
 		ut64 addr, orig;
 		addr = orig = core->offset;
 		if (core->print->cur_enabled) {
@@ -2497,40 +2502,30 @@ static void __handleComment(RCore *core) {
 			r_core_seek (core, addr, false);
 			r_core_cmdf (core, "s 0x%"PFMT64x, addr);
 		}
-		if (!strcmp (buf + i, "-")) {
-			strcpy (buf, "CC-");
+		if (!strcmp (buf, "-")) {
+			cmd = strdup ("CC-");
 		} else {
-			switch (buf[i]) {
+			char *arg = filter_arg (strdup (buf));
+			switch (buf[0]) {
 			case '-':
-				memcpy (buf, "\"CC-", 5);
+				cmd = r_str_newf ("\"CC-%s\"", arg);
 				break;
 			case '!':
-				memcpy (buf, "\"CC!", 5);
+				strcpy (buf, "\"CC!");
 				break;
 			default:
-				memcpy (buf, "\"CC ", 4);
+				cmd = r_str_newf ("\"CC %s\"", arg);
 				break;
 			}
-			strcat (buf, "\"");
+			free (arg);
 		}
-		if (buf[3] == ' ') {
-			int j, len = strlen (buf);
-			char *duped = strdup (buf);
-			for (i = 4, j = 4; i < len; i++, j++) {
-				char c = duped[i];
-				if (c == '"' && i != (len - 1)) {
-					buf[j++] = '\\';
-					buf[j] = '"';
-				} else {
-					buf[j] = c;
-				}
-			}
-			free (duped);
+		if (cmd) {
+			r_core_cmd (core, cmd, 1);
 		}
-		r_core_cmd (core, buf, 1);
 		if (core->print->cur_enabled) {
 			r_core_seek (core, orig, true);
 		}
+		free (cmd);
 	}
 	__set_refresh_by_type (core, p->model->cmd, true);
 }
diff --git a/libr/core/visual.c b/libr/core/visual.c
index 98be2d8b8c..6476e37cb0 100644
--- a/libr/core/visual.c
+++ b/libr/core/visual.c
@@ -3525,6 +3525,7 @@ R_API int r_core_visual_cmd(RCore *core, const char *arg) {
 							buf[j] = c;
 						}
 					}
+					buf[j] = 0;
 					free (duped);
 				}
 				r_core_cmd (core, buf, 1);
diff --git a/libr/debug/p/native/linux/linux_debug.c b/libr/debug/p/native/linux/linux_debug.c
index 39c6b83d67..0cae4bf4ee 100644
--- a/libr/debug/p/native/linux/linux_debug.c
+++ b/libr/debug/p/native/linux/linux_debug.c
@@ -476,7 +476,7 @@ static void linux_dbg_wait_break(RDebug *dbg) {
 
 RDebugReasonType linux_dbg_wait(RDebug *dbg, int pid) {
 	RDebugReasonType reason = R_DEBUG_REASON_UNKNOWN;
-	int tid;
+	int tid = pid;
 	int status, flags = __WALL;
 	int ret = -1;
 
diff --git a/libr/fs/shell.c b/libr/fs/shell.c
index 6266a26fcb..0fa5eda8d4 100644
--- a/libr/fs/shell.c
+++ b/libr/fs/shell.c
@@ -274,11 +274,11 @@ R_API int r_fs_shell_prompt(RFSShell* shell, RFS* fs, const char* root) {
 				r_file_dump (input, file->data, file->size, 0);
 				r_fs_close (fs, file);
 			} else {
-				input -= 2; //OMFG!!!! O_O
-				memcpy (input, "./", 2);
-				if (!r_fs_dir_dump (fs, s, input)) {
+				char *f = r_str_newf ("./%s", input);
+				if (!r_fs_dir_dump (fs, s, f)) {
 					eprintf ("Cannot open file\n");
 				}
+				free (f);
 			}
 			free (s);
 		} else if (!memcmp (buf, "help", 4) || !strcmp (buf, "?")) {
diff --git a/libr/include/r_util/r_name.h b/libr/include/r_util/r_name.h
index ed706d3cbd..4be17b29d6 100644
--- a/libr/include/r_util/r_name.h
+++ b/libr/include/r_util/r_name.h
@@ -11,6 +11,7 @@ R_API bool r_name_validate_first(const char ch);
 R_API bool r_name_check(const char *s);
 R_API const char *r_name_filter_ro(const char *a);
 R_API bool r_name_filter_flag(char *s);
+R_API bool r_name_filter_print(char *s);
 R_API bool r_name_filter(char *name, int maxlen);
 R_API char *r_name_filter2(const char *name);
 
diff --git a/libr/io/p/io_self.c b/libr/io/p/io_self.c
index 5363884b6d..66f0fe657e 100644
--- a/libr/io/p/io_self.c
+++ b/libr/io/p/io_self.c
@@ -1,4 +1,4 @@
-/* radare - LGPL - Copyright 2014-2016 - pancake */
+/* radare - LGPL - Copyright 2014-2020 - pancake */
 
 #include <r_userconf.h>
 #include <r_io.h>
@@ -106,8 +106,8 @@ static int update_self_regions(RIO *io, int pid) {
 			break;
 		}
 		path[0]='\0';
-		sscanf (line, "%s %s %*s %*s %*s %[^\n]", region+2, perms, path);
-		memcpy (region, "0x", 2);
+		strcpy (region, "0x");
+		sscanf (line, "%s %s %*s %*s %*s %[^\n]", region + 2, perms, path);
 		pos_c = strchr (region + 2, '-');
 		if (pos_c) {
 			*pos_c++ = 0;
diff --git a/libr/main/rafind2.c b/libr/main/rafind2.c
index 72492a2714..91a4355831 100644
--- a/libr/main/rafind2.c
+++ b/libr/main/rafind2.c
@@ -69,7 +69,7 @@ static int hit(RSearchKeyword *kw, void *user, ut64 addr) {
 		if (ro->widestr) {
 			str = _str;
 			int i, j = 0;
-			for (i = delta; ro->buf[i] && i < sizeof (_str); i++) {
+			for (i = delta; ro->buf[i] && i < sizeof (_str) - 1; i++) {
 				char ch = ro->buf[i];
 				if (ch == '"' || ch == '\\') {
 					ch = '\'';
@@ -91,7 +91,7 @@ static int hit(RSearchKeyword *kw, void *user, ut64 addr) {
 			str[j] = 0;
 		} else {
 			size_t i;
-			for (i = 0; i < sizeof (_str); i++) {
+			for (i = 0; i < sizeof (_str) - 1; i++) {
 				char ch = ro->buf[delta + i];
 				if (ch == '"' || ch == '\\') {
 					ch = '\'';
@@ -105,7 +105,7 @@ static int hit(RSearchKeyword *kw, void *user, ut64 addr) {
 		}
 	} else {
 		size_t i;
-		for (i = 0; i < sizeof (_str); i++) {
+		for (i = 0; i < sizeof (_str) - 1; i++) {
 			char ch = ro->buf[delta + i];
 			if (ch == '"' || ch == '\\') {
 				ch = '\'';
diff --git a/libr/parse/parse.c b/libr/parse/parse.c
index 559d14907d..b08191f575 100644
--- a/libr/parse/parse.c
+++ b/libr/parse/parse.c
@@ -105,7 +105,7 @@ R_API bool r_parse_parse(RParse *p, const char *data, char *str) {
 }
 
 R_API char *r_parse_immtrim(char *opstr) {
-	if (!opstr || !*opstr) {
+	if (R_STR_ISEMPTY (opstr)) {
 		return NULL;
 	}
 	char *n = strstr (opstr, "0x");
diff --git a/libr/reg/profile.c b/libr/reg/profile.c
index db101f8d7b..7e33bcf70d 100644
--- a/libr/reg/profile.c
+++ b/libr/reg/profile.c
@@ -391,7 +391,6 @@ R_API char *r_reg_parse_gdb_profile(const char *profile_file) {
 				str = r_file_slurp (file, NULL);
 				free (file);
 			}
-			free (base);
 		}
 	}
 	if (str) {
diff --git a/libr/socket/run.c b/libr/socket/run.c
index 61327453f7..9a41b22696 100644
--- a/libr/socket/run.c
+++ b/libr/socket/run.c
@@ -724,7 +724,7 @@ static int redirect_socket_to_pty(RSocket *sock) {
 #if HAVE_PTY
 	// directly duplicating the fds using dup2() creates problems
 	// in case of interactive applications
-	int fdm, fds;
+	int fdm = -1, fds = -1;
 
 	if (dyn_openpty && dyn_openpty (&fdm, &fds, NULL, NULL, NULL) == -1) {
 		perror ("opening pty");
@@ -735,8 +735,12 @@ static int redirect_socket_to_pty(RSocket *sock) {
 
 	if (child_pid == -1) {
 		eprintf ("cannot fork\n");
-		close(fdm);
-		close(fds);
+		if (fdm != -1) {
+			close (fdm);
+		}
+		if (fds != -1) {
+			close (fds);
+		}
 		return -1;
 	}
 
@@ -773,7 +777,10 @@ static int redirect_socket_to_pty(RSocket *sock) {
 		}
 
 		free (buff);
-		close (fdm);
+		if (fdm != -1) {
+			close (fdm);
+			fdm = -1;
+		}
 		r_socket_free (sock);
 		exit (0);
 	}
@@ -783,7 +790,9 @@ static int redirect_socket_to_pty(RSocket *sock) {
 	if (dyn_login_tty) {
 		dyn_login_tty (fds);
 	}
-	close (fdm);
+	if (fdm != -1) {
+		close (fdm);
+	}
 
 	// disable the echo on slave stdin
 	struct termios t;
diff --git a/libr/socket/socket.c b/libr/socket/socket.c
index ca894ee2f0..aa50987917 100644
--- a/libr/socket/socket.c
+++ b/libr/socket/socket.c
@@ -135,7 +135,6 @@ static bool __connect_unix(RSocket *s, const char *file) {
 
 	if (connect (sock, (struct sockaddr *)&addr, sizeof(addr))==-1) {
 		close (sock);
-		free (s);
 		return false;
 	}
 	s->fd = sock;
diff --git a/libr/util/file.c b/libr/util/file.c
index b223de98c2..0f0f92de72 100644
--- a/libr/util/file.c
+++ b/libr/util/file.c
@@ -907,7 +907,7 @@ static RMmap *r_file_mmap_unix (RMmap *m, int fd) {
 		m->rw?PROT_READ|PROT_WRITE:PROT_READ,
 		MAP_SHARED, fd, (off_t)m->base);
 	if (m->buf == MAP_FAILED) {
-		R_FREE (m);
+		m->buf = NULL;
 	}
 	return m;
 }
diff --git a/libr/util/name.c b/libr/util/name.c
index 5ab384fe95..ede869ee82 100644
--- a/libr/util/name.c
+++ b/libr/util/name.c
@@ -4,6 +4,7 @@
 
 /* Validate if char is printable , why not use ISPRINTABLE() ?? */
 R_API bool r_name_validate_print(const char ch) {
+	// TODO: support utf8
 	if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || IS_DIGIT (ch)) {
 		return true;
 	}
@@ -109,6 +110,23 @@ R_API const char *r_name_filter_ro(const char *a) {
 	return a - 1;
 }
 
+// filter string for printing purposes
+R_API bool r_name_filter_print(char *s) {
+	char *es = s + strlen (s);
+	char *os = s;
+	while (*s && s < es) {
+		int us = r_utf8_size ((const ut8*)s);
+		if (us > 1) {
+			s += us;	
+			continue;
+		}
+		if (!r_name_validate_print (*s)) {
+			r_str_cpy (s, s + 1);
+		}
+		s++;
+	}
+	return os;
+}
 
 R_API bool r_name_filter(char *s, int maxlen) {
 	// if maxlen == -1 : R_FLAG_NAME_SIZE
diff --git a/libr/util/strpool.c b/libr/util/strpool.c
index f6a8a0f7b3..149ec7ef83 100644
--- a/libr/util/strpool.c
+++ b/libr/util/strpool.c
@@ -1,8 +1,8 @@
-/* radare - LGPL - Copyright 2012 - pancake */
+/* radare - LGPL - Copyright 2012-2020 - pancake */
 
 #include <r_util.h>
 
-R_API RStrpool* r_strpool_new (int sz) {
+R_API RStrpool* r_strpool_new(int sz) {
 	RStrpool *p = R_NEW (RStrpool);
 	if (!p) {
 		eprintf ("Malloc failed!\n");
@@ -23,14 +23,14 @@ R_API RStrpool* r_strpool_new (int sz) {
 	return p;
 }
 
-R_API char *r_strpool_empty (RStrpool *p) {
+R_API char *r_strpool_empty(RStrpool *p) {
 	p->len = 0;
 	p->str[0] = 0;
 	p->str[1] = 0;
 	return p->str;
 }
 
-R_API char *r_strpool_alloc (RStrpool *p, int l) {
+R_API char *r_strpool_alloc(RStrpool *p, int l) {
 	char *ret = p->str + p->len;
 	if ((p->len + l) >= p->size) {
 		ut64 osize = p->size;
@@ -48,6 +48,7 @@ R_API char *r_strpool_alloc (RStrpool *p, int l) {
 		if (!ret) {
 			eprintf ("Realloc failed!\n");
 			free (p->str);
+			p->str = NULL;
 			return NULL;
 		}
 		p->str = ret;
@@ -78,7 +79,7 @@ R_API int r_strpool_ansi_chop(RStrpool *p, int n){
 	return i;
 }
 
-R_API void r_strpool_free (RStrpool *p) {
+R_API void r_strpool_free(RStrpool *p) {
 	free (p->str);
 	free (p);
 }
@@ -139,7 +140,7 @@ R_API char *r_strpool_next(RStrpool *p, int index) {
 	return ptr;
 }
 
-R_API char *r_strpool_slice (RStrpool *p, int index) {
+R_API char *r_strpool_slice(RStrpool *p, int index) {
 	int idx, len;
 	char *o, *x = r_strpool_get_i (p, index + 1);
 	if (!x || !*x) {
diff --git a/libr/util/syscmd.c b/libr/util/syscmd.c
index 36d8578271..9ac2beb0d2 100644
--- a/libr/util/syscmd.c
+++ b/libr/util/syscmd.c
@@ -1,4 +1,4 @@
-/* radare - LGPL - Copyright 2013-2018 - pancake */
+/* radare - LGPL - Copyright 2013-2020 - pancake */
 
 #include <r_core.h>
 #include <errno.h>
diff --git a/shlr/java/class.c b/shlr/java/class.c
index 0adcd12e12..44eca04c62 100644
--- a/shlr/java/class.c
+++ b/shlr/java/class.c
@@ -650,23 +650,26 @@ R_API DsoJsonObj *r_bin_java_get_bin_obj_json(RBinJavaObj *bin) {
 	char *res = dso_json_obj_to_str (methods_list);
 	// eprintf ("Resulting methods json: \n%s\n", res);
 	free (res);
-	dso_json_dict_insert_str_key_obj (class_dict, "methods", methods_list);
-	// dso_json_list_free (methods_list);
-	dso_json_obj_del (methods_list);
+	if (dso_json_dict_insert_str_key_obj (class_dict, "methods", methods_list)) {
+		// dso_json_list_free (methods_list);
+		dso_json_obj_del (methods_list);
+	}
 
 	res = dso_json_obj_to_str (fields_list);
 	// eprintf ("Resulting fields json: \n%s\n", res);
 	free (res);
-	dso_json_dict_insert_str_key_obj (class_dict, "fields", fields_list);
-	// dso_json_list_free (fields_list);
-	dso_json_obj_del (fields_list);
+	if (dso_json_dict_insert_str_key_obj (class_dict, "fields", fields_list)) {
+		// dso_json_list_free (fields_list);
+		dso_json_obj_del (fields_list);
+	}
 
 	res = dso_json_obj_to_str (imports_list);
 	// eprintf ("Resulting imports json: \n%s\n", res);
 	free (res);
-	dso_json_dict_insert_str_key_obj (class_dict, "imports", imports_list);
-	// dso_json_list_free (imports_list);
-	dso_json_obj_del (imports_list);
+	if (dso_json_dict_insert_str_key_obj (class_dict, "imports", imports_list)) {
+		// dso_json_list_free (imports_list);
+		dso_json_obj_del (imports_list);
+	}
 
 	// res = dso_json_obj_to_str (interfaces_list);
 	// eprintf ("Resulting interfaces json: \n%s\n", res);
@@ -739,8 +742,9 @@ R_API DsoJsonObj *r_bin_java_get_class_info_json(RBinJavaObj *bin) {
 
 		if (!class_->super) {
 			DsoJsonObj *str = dso_json_str_new ();
-			dso_json_dict_insert_str_key_obj (class_info_dict, "super", str);
-			dso_json_str_free (str);
+			if (dso_json_dict_insert_str_key_obj (class_info_dict, "super", str)) {
+				dso_json_str_free (str);
+			}
 		} else {
 			dso_json_dict_insert_str_key_str (class_info_dict, "super", class_->super);
 		}
@@ -756,10 +760,11 @@ R_API DsoJsonObj *r_bin_java_get_class_info_json(RBinJavaObj *bin) {
 			}
 		}
 	}
-	dso_json_dict_insert_str_key_obj (class_info_dict, "interfaces", interfaces_list);
+	if (dso_json_dict_insert_str_key_obj (class_info_dict, "interfaces", interfaces_list)) {
+		// dso_json_list_free (interfaces_list);
+		dso_json_obj_del (interfaces_list);
+	}
 	r_list_free (classes);
-	// dso_json_list_free (interfaces_list);
-	dso_json_obj_del (interfaces_list);
 	return class_info_dict;
 }
 
diff --git a/shlr/java/dsojson.c b/shlr/java/dsojson.c
index fae48ec979..520539b465 100644
--- a/shlr/java/dsojson.c
+++ b/shlr/java/dsojson.c
@@ -504,7 +504,7 @@ char * dso_json_dict_to_str (DsoJsonDict *dict) {
 	return strdup ("{}");
 }
 
-int dso_json_dict_insert_str_key_obj (DsoJsonObj *dict, char *key, DsoJsonObj *val_obj) {
+int dso_json_dict_insert_str_key_obj(DsoJsonObj *dict, char *key, DsoJsonObj *val_obj) {
 	DsoJsonObj *key_obj = dso_json_str_new_from_str (key);
 	int res = dso_json_dict_insert_key_obj (dict, key_obj, val_obj);
 	if (!res) {
@@ -513,7 +513,7 @@ int dso_json_dict_insert_str_key_obj (DsoJsonObj *dict, char *key, DsoJsonObj *v
 	return res;
 }
 
-int dso_json_dict_insert_str_key_num (DsoJsonObj *dict, char *key, int val) {
+int dso_json_dict_insert_str_key_num(DsoJsonObj *dict, char *key, int val) {
 	DsoJsonObj *key_obj = dso_json_str_new_from_str (key);
 	DsoJsonObj *val_obj = dso_json_num_new_from_num (val);
 	int res = dso_json_dict_insert_key_obj (dict, key_obj, val_obj);
diff --git a/shlr/winkd/iob_net.c b/shlr/winkd/iob_net.c
index cde5a10840..7f9a46a64a 100644
--- a/shlr/winkd/iob_net.c
+++ b/shlr/winkd/iob_net.c
@@ -348,6 +348,7 @@ static bool _sendResponsePacket(iobnet_t *obj, const ut8 *pokedata) {
 	ut8 *pkt = _createKDNetPacket (obj, resbuf, 322, &size, seqno, 1);
 	if (!pkt) {
 		free (resbuf);
+		resbuf = NULL;
 	}
 
 	if (r_socket_write (obj->sock, (void *)pkt, size) < 0) {