The patch titled Subject: selftests/mm: virtual_address_range: fix error when CommitLimit < 1GiB has been added to the -mm mm-hotfixes-unstable branch. Its filename is selftests-mm-virtual_address_range-fix-error-when-commitlimit-1gib.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: Thomas Wei��schuh thomas.weissschuh@linutronix.de Subject: selftests/mm: virtual_address_range: fix error when CommitLimit < 1GiB Date: Tue, 07 Jan 2025 16:14:45 +0100

If not enough physical memory is available the kernel may fail mmap(); see __vm_enough_memory() and vm_commit_limit(). In that case the logic in validate_complete_va_space() does not make sense and will even incorrectly fail. Instead skip the test if no mmap() succeeded.

Link: https://lkml.kernel.org/r/20250107-virtual_address_range-tests-v1-1-3834a2fb... Fixes: 010409649885 ("selftests/mm: confirm VA exhaustion without reliance on correctness of mmap()") Signed-off-by: Thomas Wei��schuh thomas.weissschuh@linutronix.de Cc: stable@vger.kernel.org Cc: Dev Jain dev.jain@arm.com Cc: kernel test robot oliver.sang@intel.com Cc: Shuah Khan shuah@kernel.org Cc: Thomas Gleixner tglx@linutronix.de Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

tools/testing/selftests/mm/virtual_address_range.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/tools/testing/selftests/mm/virtual_address_range.c~selftests-mm-virtual_address_range-fix-error-when-commitlimit-1gib +++ a/tools/testing/selftests/mm/virtual_address_range.c @@ -178,6 +178,12 @@ int main(int argc, char *argv[]) validate_addr(ptr[i], 0); } lchunks = i; + + if (!lchunks) { + ksft_test_result_skip("Not enough memory for a single chunk\n"); + ksft_finished(); + } + hptr = (char **) calloc(NR_CHUNKS_HIGH, sizeof(char *)); if (hptr == NULL) { ksft_test_result_skip("Memory constraint not fulfilled\n"); _

Patches currently in -mm which might be from thomas.weissschuh@linutronix.de are

selftests-mm-virtual_address_range-fix-error-when-commitlimit-1gib.patch selftests-mm-virtual_address_range-avoid-reading-vvar-mappings.patch