diff options
| author | Paul E. McKenney <[email protected]> | 2020-12-08 15:26:22 -0800 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2021-01-22 15:23:57 -0800 |
| commit | b70fa3b12fc8d2b870d1ac7fd44da89271eb8705 (patch) | |
| tree | f68cacbddfff2a6cc7d48b02f1fb06b4576b70db | |
| parent | 8e7f37f2aaa56b723a24f6872817cf9c6410b613 (diff) | |
mm: Make mem_dump_obj() handle NULL and zero-sized pointers
This commit makes mem_dump_obj() call out NULL and zero-sized pointers
specially instead of classifying them as non-paged memory.
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: <[email protected]>
Reported-by: Andrii Nakryiko <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Tested-by: Naresh Kamboju <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
| -rw-r--r-- | mm/util.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/util.c b/mm/util.c index da46f9d6c382..92f23d2c1277 100644 --- a/mm/util.c +++ b/mm/util.c @@ -997,7 +997,12 @@ int __weak memcmp_pages(struct page *page1, struct page *page2) void mem_dump_obj(void *object) { if (!virt_addr_valid(object)) { - pr_cont(" non-paged (local) memory.\n"); + if (object == NULL) + pr_cont(" NULL pointer.\n"); + else if (object == ZERO_SIZE_PTR) + pr_cont(" zero-size pointer.\n"); + else + pr_cont(" non-paged (local) memory.\n"); return; } if (kmem_valid_obj(object)) { |