diff --git a/libr/io/io_memory.c b/libr/io/io_memory.c
index 77dc85a645e75..f8056e4b7d149 100644
--- a/libr/io/io_memory.c
+++ b/libr/io/io_memory.c
@@ -79,7 +79,7 @@ R_IPI bool io_memory_resize(RIO *io, RIODesc *fd, ut64 count) {
 
 R_IPI int io_memory_read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
 	R_RETURN_VAL_IF_FAIL (io && fd && buf, -1);
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	if (!fd->data) {
 		return -1;
 	}
diff --git a/libr/io/p/io_bochs.c b/libr/io/p/io_bochs.c
index 4241aca9a4027..4bac0949cee9f 100644
--- a/libr/io/p/io_bochs.c
+++ b/libr/io/p/io_bochs.c
@@ -64,7 +64,7 @@ static ut64 __lseek(RIO *io, RIODesc *fd, ut64 offset, int whence) {
 }
 
 static int __read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	ut64 addr = io->off;
 	if (!desc || !desc->data) {
 		return -1;
diff --git a/libr/io/p/io_dsc.c b/libr/io/p/io_dsc.c
index a9dd4317faa79..e990255183f28 100644
--- a/libr/io/p/io_dsc.c
+++ b/libr/io/p/io_dsc.c
@@ -922,7 +922,7 @@ static int r_io_posix_open(const char *file, int perm, int mode, bool nocache) {
 static int dsc_object_read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
 	R_RETURN_VAL_IF_FAIL (fd && fd->data && buf, -1);
 	if (io->off == UT64_MAX) {
-		memset (buf, 0xff, count);
+		memset (buf, io->Oxff, count);
 		return count;
 	}
 	RIODscObject *dsc = fd->data;
diff --git a/libr/io/p/io_gdb.c b/libr/io/p/io_gdb.c
index bcaf8aa5a7d70..11b0838ef44dc 100644
--- a/libr/io/p/io_gdb.c
+++ b/libr/io/p/io_gdb.c
@@ -166,7 +166,7 @@ static int __read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
 	if (!io || !fd || !buf || count < 1) {
 		return -1;
 	}
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	ut64 addr = io->off;
 	if (!desc || !desc->data) {
 		return -1;
diff --git a/libr/io/p/io_gzip.c b/libr/io/p/io_gzip.c
index 397ea035d1738..0b3d6bcaa6550 100644
--- a/libr/io/p/io_gzip.c
+++ b/libr/io/p/io_gzip.c
@@ -104,7 +104,7 @@ static bool __resize(RIO *io, RIODesc *fd, ut64 count) {
 }
 
 static int __read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	if (!fd || !fd->data) {
 		return -1;
 	}
diff --git a/libr/io/p/io_mach.c b/libr/io/p/io_mach.c
index 0dfbd76746d91..32ddad9793b2c 100644
--- a/libr/io/p/io_mach.c
+++ b/libr/io/p/io_mach.c
@@ -233,7 +233,7 @@ static int __read(RIO *io, RIODesc *desc, ut8 *buf, int len) {
 	if (dd ->magic != r_str_hash ("mach")) {
 		return -1;
 	}
-	memset (buf, 0xff, len);
+	memset (buf, io->Oxff, len);
 	int pid = __get_pid (desc);
 	task_t task = pid_to_task (desc, pid);
 	if (task_is_dead (desc, pid)) {
@@ -260,12 +260,12 @@ static int __read(RIO *io, RIODesc *desc, ut8 *buf, int len) {
 			break;
 		case KERN_INVALID_ADDRESS:
 			if (blocksize == 1) {
-				memset (buf+copied, 0xff, len-copied);
+				memset (buf+copied, io->Oxff, len-copied);
 				return size+copied;
 			}
 			blocksize = 1;
 			blen = 1;
-			buf[copied] = 0xff;
+			buf[copied] = io->Oxff;
 			break;
 		}
 		if (err == -1 || size < 1) {
@@ -273,12 +273,12 @@ static int __read(RIO *io, RIODesc *desc, ut8 *buf, int len) {
 		}
 		if (size == 0) {
 			if (blocksize == 1) {
-				memset (buf + copied, 0xff, len - copied);
+				memset (buf + copied, io->Oxff, len - copied);
 				return len;
 			}
 			blocksize = 1;
 			blen = 1;
-			buf[copied] = 0xff;
+			buf[copied] = io->Oxff;
 		}
 		copied += blen;
 	}
diff --git a/libr/io/p/io_procpid.c b/libr/io/p/io_procpid.c
index 2886f446158ac..932bf5258696b 100644
--- a/libr/io/p/io_procpid.c
+++ b/libr/io/p/io_procpid.c
@@ -34,7 +34,7 @@ static int debug_os_read_at(int fdn, void *buf, int sz, ut64 addr) {
 }
 
 static int __read(RIO *io, RIODesc *fd, ut8 *buf, int len) {
-	memset (buf, 0xff, len); // TODO: only memset the non-readed bytes
+	memset (buf, io->Oxff, len); // TODO: only memset the non-readed bytes
 	return debug_os_read_at (RIOPROCPID_FD (fd), buf, len, io->off);
 }
 
diff --git a/libr/io/p/io_qnx.c b/libr/io/p/io_qnx.c
index c265f58a1d994..2363e9b7145fe 100644
--- a/libr/io/p/io_qnx.c
+++ b/libr/io/p/io_qnx.c
@@ -131,7 +131,7 @@ static ut64 __lseek(RIO *io, RIODesc *fd, ut64 offset, int whence) {
 }
 
 static int __read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	ut64 addr = io->off;
 	if (!desc) {
 		return -1;
diff --git a/libr/io/p/io_r2k.c b/libr/io/p/io_r2k.c
index e26f2fe5569ba..1e1e85a75aa67 100644
--- a/libr/io/p/io_r2k.c
+++ b/libr/io/p/io_r2k.c
@@ -1,4 +1,4 @@
-/* io_r2k - radare2 - LGPL - Copyright 2016-2024 - SkUaTeR + panda */
+/* io_r2k - radare2 - LGPL - Copyright 2016-2025 - pancake, SkUaTeR, panda */
 
 #include <r_io.h>
 #include <r_lib.h>
@@ -49,12 +49,12 @@ static int r2k__read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
 		return ReadMemory (io, fd, IOCTL_READ_PHYSICAL_ADDR, r2k_struct.pid, io->off, buf, count);
 	default:
 		R_LOG_ERROR ("Undefined beid in r2k__read");
-		memset (buf, 0xff, count);
+		memset (buf, io->Oxff, count);
 		return count;
 	}
 #else
 	R_LOG_TODO ("r2k not implemented for this plataform");
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	return count;
 #endif
 }
@@ -135,7 +135,7 @@ static RIODesc *r2k__open(RIO *io, const char *pathname, int rw, int mode) {
 RIOPlugin r_io_plugin_r2k = {
 	.meta = {
 		.name = "r2k",
-		.desc = "Kernel access API io",
+		.desc = "Client side to comunicate with the r2k kernel module",
 		.author = "skuater,panda",
 		.license = "LGPL-3.0-only",
 	},
diff --git a/libr/io/p/io_reg.c b/libr/io/p/io_reg.c
index f9df2fb60560f..40c1b0aa40d7a 100644
--- a/libr/io/p/io_reg.c
+++ b/libr/io/p/io_reg.c
@@ -33,7 +33,7 @@ static int __read(RIO *io, RIODesc *fd, ut8 *buf, int len) {
 		return -1;
 	}
 	int left = arena->size - io->off;
-	memset (buf, 0xff, len);
+	memset (buf, io->Oxff, len);
 	memcpy (buf, arena->bytes + io->off, R_MIN (left, len));
 	return len;
 }
@@ -76,9 +76,8 @@ static ut64 __lseek(RIO *io, RIODesc *fd, ut64 offset, int whence) {
 	case R_IO_SEEK_SET:
 		if (offset >= size) {
 			return size;
-		} else {
-			return offset;
 		}
+		return offset;
 	case R_IO_SEEK_CUR:
 		return io->off + offset;
 	case R_IO_SEEK_END:
diff --git a/libr/io/p/io_self.c b/libr/io/p/io_self.c
index e9ab78a9061d3..b44b4f80cb375 100644
--- a/libr/io/p/io_self.c
+++ b/libr/io/p/io_self.c
@@ -395,7 +395,7 @@ static int __read(RIO *io, RIODesc *desc, ut8 *buf, int len) {
 			return newlen;
 		}
 	}
-	memset (buf, 0xff, len);
+	memset (buf, io->Oxff, len);
 	return 0;
 }
 
diff --git a/libr/io/p/io_sysgdb.c b/libr/io/p/io_sysgdb.c
index bba0b5cededfd..2a5d34068267f 100644
--- a/libr/io/p/io_sysgdb.c
+++ b/libr/io/p/io_sysgdb.c
@@ -166,7 +166,7 @@ static int __read(RIO *io, RIODesc *fd, ut8 *buf, int count) {
 		left = count - 1024;
 		count = 1024;
 	}
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	if (count > 0) {
 		char *cmd = r_str_newf ("x/%db 0x%"PFMT64x, count, addr);
 		char *ores = runcmd (cmd);
diff --git a/libr/io/p/io_winedbg.c b/libr/io/p/io_winedbg.c
index 2b14951dd20f8..96de85c73cd0a 100644
--- a/libr/io/p/io_winedbg.c
+++ b/libr/io/p/io_winedbg.c
@@ -101,7 +101,7 @@ Wine-dbg>
 	int wordSize = 4;
 	ut32 *w = (ut32*)buf;
 	int i;
-	memset (buf, 0xff, count);
+	memset (buf, io->Oxff, count);
 	int words = count / wordSize; // XXX must pad align to 4
 	for (i = 0; i < words ; i++) {
 		ut64 addr = io->off + (i * wordSize);
@@ -116,7 +116,7 @@ Wine-dbg>
 
 	int left = count % wordSize;
 	if (left > 0) {
-		ut32 n = 0xff;
+		ut32 n = UT32_MAX;
 		ut8 *wn = (ut8*)&n;
 		ut64 addr = io->off + (i * wordSize);
 		char *cmd = r_str_newf ("x 0x%"PFMT64x, addr);
diff --git a/libr/io/undo.c b/libr/io/undo.c
index 9587ac3fc1e17..52a490d535659 100644
--- a/libr/io/undo.c
+++ b/libr/io/undo.c
@@ -225,7 +225,7 @@ R_API void r_io_wundo_new(RIO *io, ut64 off, const ut8 *data, int len) {
 		R_FREE (uw);
 		return;
 	}
-	memset (uw->o, 0xff, len);
+	memset (uw->o, io->Oxff, len);
 	r_io_read_at (io, off, uw->o, len);
 	r_list_append (io->undo.w_list, uw);
 }