diff --git a/Makefile.am b/Makefile.am
index 8e4fffc5d793..4e7e29589fc0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,230 +1,225 @@
 include $(top_srcdir)/config/Shellcheck.am
 
 ACLOCAL_AMFLAGS = -I config
 
 SUBDIRS = include
 if BUILD_LINUX
 SUBDIRS += rpm
 endif
 
 if CONFIG_USER
 SUBDIRS += man scripts lib tests cmd etc contrib
 if BUILD_LINUX
 SUBDIRS += udev
 endif
 endif
 if CONFIG_KERNEL
 SUBDIRS += module
 
 extradir = $(prefix)/src/zfs-$(VERSION)
 extra_HEADERS = zfs.release.in zfs_config.h.in
 
 if BUILD_LINUX
 kerneldir = $(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION)
 nodist_kernel_HEADERS = zfs.release zfs_config.h module/$(LINUX_SYMBOLS)
 endif
 endif
 
 AUTOMAKE_OPTIONS = foreign
 EXTRA_DIST  = autogen.sh copy-builtin
 EXTRA_DIST += config/config.awk config/rpm.am config/deb.am config/tgz.am
 EXTRA_DIST += AUTHORS CODE_OF_CONDUCT.md COPYRIGHT LICENSE META NEWS NOTICE
 EXTRA_DIST += README.md RELEASES.md
 EXTRA_DIST += module/lua/README.zfs module/os/linux/spl/README.md
 
 # Include all the extra licensing information for modules
 EXTRA_DIST += module/icp/algs/skein/THIRDPARTYLICENSE
 EXTRA_DIST += module/icp/algs/skein/THIRDPARTYLICENSE.descrip
 EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman
 EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman.descrip
 EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl
 EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl.descrip
 EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.cryptogams
 EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.cryptogams.descrip
 EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.openssl
 EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.openssl.descrip
 EXTRA_DIST += module/os/linux/spl/THIRDPARTYLICENSE.gplv2
 EXTRA_DIST += module/os/linux/spl/THIRDPARTYLICENSE.gplv2.descrip
 EXTRA_DIST += module/zfs/THIRDPARTYLICENSE.cityhash
 EXTRA_DIST += module/zfs/THIRDPARTYLICENSE.cityhash.descrip
 
 @CODE_COVERAGE_RULES@
 
 GITREV = include/zfs_gitrev.h
 
 PHONY = gitrev
 gitrev:
 	$(AM_V_GEN)$(top_srcdir)/scripts/make_gitrev.sh $(GITREV)
 
 all: gitrev
 
 # Double-colon rules are allowed; there are multiple independent definitions.
 maintainer-clean-local::
 	-$(RM) $(GITREV)
 
 distclean-local::
 	-$(RM) -R autom4te*.cache build
 	-find . \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
 		-o -name .pc -o -name .hg -o -name .git \) -prune -o \
 		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
 		-o -name '.*.rej' -o -size 0 -o -name '*%' -o -name '.*.cmd' \
 		-o -name 'core' -o -name 'Makefile' -o -name 'Module.symvers' \
 		-o -name '*.order' -o -name '*.markers' -o -name '*.gcda' \
 		-o -name '*.gcno' \) \
 		-type f -print | xargs $(RM)
 
 all-local:
 	-[ -x ${top_builddir}/scripts/zfs-tests.sh ] && \
 	    ${top_builddir}/scripts/zfs-tests.sh -c
 
 dist-hook:
 	$(AM_V_GEN)$(top_srcdir)/scripts/make_gitrev.sh -D $(distdir) $(GITREV)
 	$(SED) ${ac_inplace} -e 's/Release:[[:print:]]*/Release:      $(RELEASE)/' \
 		$(distdir)/META
 
 if BUILD_LINUX
 # For compatibility, create a matching spl-x.y.z directly which contains
 # symlinks to the updated header and object file locations.  These
 # compatibility links will be removed in the next major release.
 if CONFIG_KERNEL
 install-data-hook:
 	rm -rf $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
 	mkdir $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
 	cd $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
 	ln -s ../zfs-$(VERSION)/include/spl include && \
 	ln -s ../zfs-$(VERSION)/$(LINUX_VERSION) $(LINUX_VERSION) && \
 	ln -s ../zfs-$(VERSION)/zfs_config.h.in spl_config.h.in && \
 	ln -s ../zfs-$(VERSION)/zfs.release.in spl.release.in && \
 	cd $(DESTDIR)$(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION) && \
 	ln -fs zfs_config.h spl_config.h && \
 	ln -fs zfs.release spl.release
 endif
 endif
 
 PHONY += codecheck
 codecheck: cstyle shellcheck checkbashisms flake8 mancheck testscheck vcscheck
 
 PHONY += checkstyle
 checkstyle: codecheck commitcheck
 
 PHONY += commitcheck
 commitcheck:
 	@if git rev-parse --git-dir > /dev/null 2>&1; then \
 		${top_srcdir}/scripts/commitcheck.sh; \
 	fi
 
 PHONY += cstyle
 cstyle:
 	@find ${top_srcdir} -name build -prune \
 		-o -type f -name '*.[hc]' \
 		! -name 'zfs_config.*' ! -name '*.mod.c' \
 		! -name 'opt_global.h' ! -name '*_if*.h' \
 		! -path './module/zstd/lib/*' \
 		-exec ${top_srcdir}/scripts/cstyle.pl -cpP {} \+
 
 filter_executable = -exec test -x '{}' \; -print
 
 SHELLCHECKDIRS = cmd contrib etc scripts tests
 SHELLCHECKSCRIPTS = autogen.sh
 
 PHONY += checkabi storeabi
 checkabi: lib
 	$(MAKE) -C lib checkabi
 
 storeabi: lib
 	$(MAKE) -C lib storeabi
 
 PHONY += mancheck
 mancheck:
-	@if type mandoc > /dev/null 2>&1; then \
-		find ${top_srcdir}/man ${top_srcdir}/tests/test-runner/man -type f -name '*[1-9]*' \
-			-exec mandoc -Tlint -Werror {} \+; \
-	else \
-		echo "skipping mancheck because mandoc is not installed"; \
-	fi
+	${top_srcdir}/scripts/mancheck.sh ${top_srcdir}/man ${top_srcdir}/tests/test-runner/man
 
 if BUILD_LINUX
 stat_fmt = -c '%A %n'
 else
 stat_fmt = -f '%Sp %N'
 endif
 
 PHONY += testscheck
 testscheck:
 	@find ${top_srcdir}/tests/zfs-tests -type f \
 		\( -name '*.ksh' -not ${filter_executable} \) -o \
 		\( -name '*.kshlib' ${filter_executable} \) -o \
 		\( -name '*.shlib' ${filter_executable} \) -o \
 		\( -name '*.cfg' ${filter_executable} \) | \
 		xargs -r stat ${stat_fmt} | \
 		awk '{c++; print} END {if(c>0) exit 1}'
 
 PHONY += vcscheck
 vcscheck:
 	@if git rev-parse --git-dir > /dev/null 2>&1; then \
 		git ls-files . --exclude-standard --others | \
 		awk '{c++; print} END {if(c>0) exit 1}' ; \
 	fi
 
 PHONY += lint
 lint: cppcheck paxcheck
 
 CPPCHECKDIRS = cmd lib module
 PHONY += cppcheck
 cppcheck: $(CPPCHECKDIRS)
 	@if test -n "$(CPPCHECK)"; then \
 		set -e ; for dir in $(CPPCHECKDIRS) ; do \
 			$(MAKE) -C $$dir cppcheck ; \
 		done \
 	else \
 		echo "skipping cppcheck because cppcheck is not installed"; \
 	fi
 
 PHONY += paxcheck
 paxcheck:
 	@if type scanelf > /dev/null 2>&1; then \
 		${top_srcdir}/scripts/paxcheck.sh ${top_builddir}; \
 	else \
 		echo "skipping paxcheck because scanelf is not installed"; \
 	fi
 
 PHONY += flake8
 flake8:
 	@if type flake8 > /dev/null 2>&1; then \
 		flake8 ${top_srcdir}; \
 	else \
 		echo "skipping flake8 because flake8 is not installed"; \
 	fi
 
 PHONY += ctags
 ctags:
 	$(RM) tags
 	find $(top_srcdir) -name '.?*' -prune \
 		-o -type f -name '*.[hcS]' -print | xargs ctags -a
 
 PHONY += etags
 etags:
 	$(RM) TAGS
 	find $(top_srcdir) -name '.?*' -prune \
 		-o -type f -name '*.[hcS]' -print | xargs etags -a
 
 PHONY += cscopelist
 cscopelist:
 	find $(top_srcdir) -name '.?*' -prune \
 		-o -type f -name '*.[hc]' -print >cscope.files
 
 PHONY += tags
 tags: ctags etags
 
 PHONY += pkg pkg-dkms pkg-kmod pkg-utils
 pkg: @DEFAULT_PACKAGE@
 pkg-dkms: @DEFAULT_PACKAGE@-dkms
 pkg-kmod: @DEFAULT_PACKAGE@-kmod
 pkg-utils: @DEFAULT_PACKAGE@-utils
 
 include config/rpm.am
 include config/deb.am
 include config/tgz.am
 
 .PHONY: $(PHONY)
diff --git a/scripts/Makefile.am b/scripts/Makefile.am
index f338cdc39195..6c59fd7d4faf 100644
--- a/scripts/Makefile.am
+++ b/scripts/Makefile.am
@@ -1,89 +1,90 @@
 include $(top_srcdir)/config/Shellcheck.am
 
 pkgdatadir = $(datadir)/@PACKAGE@
 
 dist_pkgdata_SCRIPTS = \
 	zimport.sh \
 	zfs.sh \
 	zfs-tests.sh \
 	zloop.sh \
 	zfs-helpers.sh
 
 EXTRA_SCRIPTS = \
 	commitcheck.sh \
 	common.sh.in \
 	dkms.mkconf \
 	dkms.postbuild \
 	kmodtool \
 	make_gitrev.sh \
 	man-dates.sh \
-	paxcheck.sh
+	paxcheck.sh \
+	mancheck.sh
 
 EXTRA_DIST = \
 	cstyle.pl \
 	enum-extract.pl \
 	zfs2zol-patch.sed \
 	zol2zfs-patch.sed \
 	$(EXTRA_SCRIPTS)
 
 SHELLCHECK_IGNORE = ,SC1117
 SHELLCHECKSCRIPTS = $(EXTRA_SCRIPTS)
 
 define EXTRA_ENVIRONMENT
 
 # Only required for in-tree use
 export INTREE="yes"
 export GDB="libtool --mode=execute gdb"
 export LDMOD=/sbin/insmod
 
 export CMD_DIR=@abs_top_builddir@/cmd
 export UDEV_RULE_DIR=@abs_top_builddir@/udev/rules.d
 export ZEDLET_ETC_DIR=$$CMD_DIR/zed/zed.d
 export ZEDLET_LIBEXEC_DIR=$$CMD_DIR/zed/zed.d
 export ZPOOL_SCRIPT_DIR=$$CMD_DIR/zpool/zpool.d
 export ZPOOL_SCRIPTS_PATH=$$CMD_DIR/zpool/zpool.d
 export ZPOOL_COMPAT_DIR=$$CMD_DIR/zpool/compatibility.d
 export CONTRIB_DIR=@abs_top_builddir@/contrib
 export LIB_DIR=@abs_top_builddir@/lib
 export SYSCONF_DIR=@abs_top_builddir@/etc
 
 export INSTALL_UDEV_DIR=@udevdir@
 export INSTALL_UDEV_RULE_DIR=@udevruledir@
 export INSTALL_MOUNT_HELPER_DIR=@mounthelperdir@
 export INSTALL_SYSCONF_DIR=@sysconfdir@
 export INSTALL_PYTHON_DIR=@pythonsitedir@
 
 export KMOD_SPL=@abs_top_builddir@/module/spl/spl.ko
 export KMOD_ZAVL=@abs_top_builddir@/module/avl/zavl.ko
 export KMOD_ZNVPAIR=@abs_top_builddir@/module/nvpair/znvpair.ko
 export KMOD_ZUNICODE=@abs_top_builddir@/module/unicode/zunicode.ko
 export KMOD_ZCOMMON=@abs_top_builddir@/module/zcommon/zcommon.ko
 export KMOD_ZLUA=@abs_top_builddir@/module/lua/zlua.ko
 export KMOD_ICP=@abs_top_builddir@/module/icp/icp.ko
 export KMOD_ZFS=@abs_top_builddir@/module/zfs/zfs.ko
 export KMOD_FREEBSD=@abs_top_builddir@/module/openzfs.ko
 export KMOD_ZZSTD=@abs_top_builddir@/module/zstd/zzstd.ko
 endef
 
 export EXTRA_ENVIRONMENT
 
 all-local:
 	-$(SED) -e '\|^export BIN_DIR=|s|$$|@abs_top_builddir@/bin|' \
 		-e '\|^export SBIN_DIR=|s|$$|@abs_top_builddir@/bin|' \
 		-e '\|^export LIBEXEC_DIR=|s|$$|@abs_top_builddir@/bin|' \
 		-e '\|^export ZTS_DIR=|s|$$|@abs_top_srcdir@/tests|' \
 		-e '\|^export SCRIPT_DIR=|s|$$|@abs_top_srcdir@/scripts|' \
 		$(abs_top_srcdir)/scripts/common.sh.in >common.sh
 	-echo "$$EXTRA_ENVIRONMENT" >>common.sh
 
 clean-local:
 	-$(RM) common.sh
 
 install-data-hook:
 	-$(SED) -e '\|^export BIN_DIR=|s|$$|@bindir@|' \
 		-e '\|^export SBIN_DIR=|s|$$|@sbindir@|' \
 		-e '\|^export LIBEXEC_DIR=|s|$$|@zfsexecdir@|' \
 		-e '\|^export ZTS_DIR=|s|$$|@datadir@/@PACKAGE@|' \
 		-e '\|^export SCRIPT_DIR=|s|$$|@datadir@/@PACKAGE@|' \
 		$(abs_top_srcdir)/scripts/common.sh.in \
 		>$(DESTDIR)$(datadir)/@PACKAGE@/common.sh
diff --git a/scripts/mancheck.sh b/scripts/mancheck.sh
new file mode 100755
index 000000000000..a5b8b0d0a6e7
--- /dev/null
+++ b/scripts/mancheck.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+#
+# Permission to use, copy, modify, and/or distribute this software for
+# any purpose with or without fee is hereby granted.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+# AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+# shellcheck disable=SC2086
+
+if [ "$#" -eq 0 ]; then
+    echo "Usage: $0 manpage-directory..."
+    exit 1
+fi
+
+if ! command -v mandoc > /dev/null; then
+    echo "skipping mancheck because mandoc is not installed"
+    exit 0
+fi
+
+IFS="
+"
+
+files="$(find "$@" -type f -name '*[1-9]*' ! -name '*module-param*' ! -name 'zpool-features*' ! -name 'zfs-mount-generator*')" || exit 1
+
+add_excl="$(awk '
+    /^.\\" lint-ok:/ {
+        print "-e"
+        $1 = "mandoc:"
+        $2 = FILENAME ":[[:digit:]]+:[[:digit:]]+:"
+        print
+    }' $files)"
+
+# Redirect to file instead of 2>&1ing because mandoc flushes inconsistently(?) which tears lines
+# https://github.com/openzfs/zfs/pull/12129/checks?check_run_id=2701608671#step:5:3
+etmp="$(mktemp)"
+! { mandoc -Tlint $files 2>"$etmp"; cat "$etmp"; rm -f "$etmp"; } |
+    grep -vE -e 'mandoc: outdated mandoc.db' -e 'STYLE: referenced manual not found' $add_excl >&2