diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 09126bb8cc9ffb140280c56895754a0e2c602f25..efc52ddc6864b71930c01ae1db3aee92597543df 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -517,6 +517,18 @@
 			Format: <io>,<irq>,<mode>
 			See header of drivers/net/hamradio/baycom_ser_hdx.c.
 
+	bdev_allow_write_mounted=
+			Format: <bool>
+			Control the ability to open a mounted block device
+			for writing, i.e., allow / disallow writes that bypass
+			the FS. This was implemented as a means to prevent
+			fuzzers from crashing the kernel by overwriting the
+			metadata underneath a mounted FS without its awareness.
+			This also prevents destructive formatting of mounted
+			filesystems by naive storage tooling that don't use
+			O_EXCL. Default is Y and can be changed through the
+			Kconfig option CONFIG_BLK_DEV_WRITE_MOUNTED.
+
 	bert_disable	[ACPI]
 			Disable BERT OS support on buggy BIOSes.