The patch titled Subject: lib/Kconfig.debug: TEST_IOV_ITER depends on MMU has been added to the -mm mm-hotfixes-unstable branch. Its filename is lib-kconfigdebug-test_iov_iter-depends-on-mmu.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Guenter Roeck linux@roeck-us.net Subject: lib/Kconfig.debug: TEST_IOV_ITER depends on MMU Date: Thu, 8 Feb 2024 07:30:10 -0800

Trying to run the iov_iter unit test on a nommu system such as the qemu kc705-nommu emulation results in a crash.

KTAP version 1 # Subtest: iov_iter # module: kunit_iov_iter 1..9 BUG: failure at mm/nommu.c:318/vmap()! Kernel panic - not syncing: BUG!

The test calls vmap() directly, but vmap() is not supported on nommu systems, causing the crash. TEST_IOV_ITER therefore needs to depend on MMU.

Link: https://lkml.kernel.org/r/20240208153010.1439753-1-linux@roeck-us.net Fixes: 2d71340ff1d4 ("iov_iter: Kunit tests for copying to/from an iterator") Signed-off-by: Guenter Roeck linux@roeck-us.net Cc: David Howells dhowells@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

lib/Kconfig.debug | 1 + 1 file changed, 1 insertion(+)

--- a/lib/Kconfig.debug~lib-kconfigdebug-test_iov_iter-depends-on-mmu +++ a/lib/Kconfig.debug @@ -2235,6 +2235,7 @@ config TEST_DIV64 config TEST_IOV_ITER tristate "Test iov_iter operation" if !KUNIT_ALL_TESTS depends on KUNIT + depends on MMU default KUNIT_ALL_TESTS help Enable this to turn on testing of the operation of the I/O iterator _

Patches currently in -mm which might be from linux@roeck-us.net are

lib-kconfigdebug-test_iov_iter-depends-on-mmu.patch