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Fix memory poisoning with Asan on arbitrary byte boundaries

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Asan poisons memory with an 8-byte granularity. We want to make sure that
the whole specified region is poisoned (our typical use case is a
heap-allocated object, and we want to poison the whole object, and we don't
care about the bytes after the end of the object and up to the beginning of
the next object). So align the start and end of the region to (un)poison to
an 8-byte boundary.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2023-11-02 22:44:32 +01:00
parent d29cce91d0
commit 0bdb6dc079
3 changed files with 28 additions and 0 deletions
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7
programs/test/metatest.c
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@@ -332,6 +332,13 @@ metatest_t metatests[] = {
{ "read_uninitialized_stack", "msan", read_uninitialized_stack },
{ "memory_leak", "asan", memory_leak },
{ "test_memory_poison_0_0_8", "asan", test_memory_poison },
{ "test_memory_poison_0_7_8", "asan", test_memory_poison },
{ "test_memory_poison_0_0_1", "asan", test_memory_poison },
{ "test_memory_poison_0_1_2", "asan", test_memory_poison },
{ "test_memory_poison_7_0_8", "asan", test_memory_poison },
{ "test_memory_poison_7_7_8", "asan", test_memory_poison },
{ "test_memory_poison_7_0_1", "asan", test_memory_poison },
{ "test_memory_poison_7_1_2", "asan", test_memory_poison },
{ "mutex_lock_not_initialized", "pthread", mutex_lock_not_initialized },
{ "mutex_unlock_not_initialized", "pthread", mutex_unlock_not_initialized },
{ "mutex_free_not_initialized", "pthread", mutex_free_not_initialized },