diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:47:50 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:47:50 +0000 |
| commit | 7c0639a3af697d4ae7a5db4d2ecc09eed43cad35 (patch) | |
| tree | b28a6eef28064256422bed5e477ee51f2cbb0c0b /kernel/bpf/stackmap.c | |
| parent | Adding debian version 6.7.9-2. (diff) | |
| download | linux-7c0639a3af697d4ae7a5db4d2ecc09eed43cad35.tar.xz linux-7c0639a3af697d4ae7a5db4d2ecc09eed43cad35.zip | |
Merging upstream version 6.7.12.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'kernel/bpf/stackmap.c')
| -rw-r--r-- | kernel/bpf/stackmap.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index dff7ba5397..c99f8e5234 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -91,11 +91,14 @@ static struct bpf_map *stack_map_alloc(union bpf_attr *attr) } else if (value_size / 8 > sysctl_perf_event_max_stack) return ERR_PTR(-EINVAL); - /* hash table size must be power of 2 */ - n_buckets = roundup_pow_of_two(attr->max_entries); - if (!n_buckets) + /* hash table size must be power of 2; roundup_pow_of_two() can overflow + * into UB on 32-bit arches, so check that first + */ + if (attr->max_entries > 1UL << 31) return ERR_PTR(-E2BIG); + n_buckets = roundup_pow_of_two(attr->max_entries); + cost = n_buckets * sizeof(struct stack_map_bucket *) + sizeof(*smap); smap = bpf_map_area_alloc(cost, bpf_map_attr_numa_node(attr)); if (!smap) |