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/selftests-mm-virtual_address_range-fix-error-when-commitlimit-1gib.patch
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 WeiÃ?schuh <thomas.weissschuh@xxxxxxxxxxxxx>
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-v1-1-3834a2fb47fe@xxxxxxxxxxxxx
Fixes: 010409649885 ("selftests/mm: confirm VA exhaustion without reliance on correctness of mmap()")
Signed-off-by: Thomas WeiÃ?schuh <thomas.weissschuh@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Cc: Dev Jain <dev.jain@xxxxxxx>
Cc: kernel test robot <oliver.sang@xxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxxx are
selftests-mm-virtual_address_range-fix-error-when-commitlimit-1gib.patch
selftests-mm-virtual_address_range-avoid-reading-vvar-mappings.patch
