6.6-stable review patch. If anyone has any objections, please let me know.
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From: Guenter Roeck linux@roeck-us.net
commit 1eb1e984379e2da04361763f66eec90dd75cf63e upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- lib/Kconfig.debug | 1 + 1 file changed, 1 insertion(+)
--- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2225,6 +2225,7 @@ 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