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| author |  JP Kobryn <inwardvessel@gmail.com>
| 2024-01-05 12:24:01 -0800 |
|---|---|---|
| committer |  Andrew Morton <akpm@linux-foundation.org>
| 2024-02-21 16:00:02 -0800 |
| commit | 3956570ef7776bf19f7dfdf765bbf80fbd244ab9 (patch) | |
| tree | 0ef9d6f84244a66dfc31400f2c750231c37ededc /tools | |
| parent | mm/filemap: avoid type conversion (diff) | |
| download | linux-3956570ef7776bf19f7dfdf765bbf80fbd244ab9.tar.gz linux-3956570ef7776bf19f7dfdf765bbf80fbd244ab9.tar.bz2 linux-3956570ef7776bf19f7dfdf765bbf80fbd244ab9.zip | |
selftests/mm/ksm_functional: prevent unmapping undefined address
Replace some goto statements with return statements so that unmap() is not
called on an undefined address. This change is made so that unmap() can
only be reached after mmap() is called (and the address mentioned is
defined). Returning MAP_FAILED seems acceptable since client code checks
for this value.
Link: https://lkml.kernel.org/r/20240105202401.28851-1-inwardvessel@gmail.com
Fixes: 42096aa24b82 ("selftest/mm: ksm_functional_tests: test in mmap_and_merge_range() if anything got merged")
Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/mm/ksm_functional_tests.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c index fbff0dd09191..d615767e396b 100644 --- a/tools/testing/selftests/mm/ksm_functional_tests.c +++ b/tools/testing/selftests/mm/ksm_functional_tests.c @@ -155,12 +155,12 @@ static char *mmap_and_merge_range(char val, unsigned long size, int prot, /* Stabilize accounting by disabling KSM completely. */ if (ksm_unmerge()) { ksft_test_result_fail("Disabling (unmerging) KSM failed\n"); - goto unmap; + return MAP_FAILED; } if (get_my_merging_pages() > 0) { ksft_test_result_fail("Still pages merged\n"); - goto unmap; + return MAP_FAILED; } map = mmap(NULL, size, PROT_READ|PROT_WRITE, |