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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:47:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:47:50 +0000 |
commit | 7c0639a3af697d4ae7a5db4d2ecc09eed43cad35 (patch) | |
tree | b28a6eef28064256422bed5e477ee51f2cbb0c0b /kernel/bpf/devmap.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/devmap.c')
-rw-r--r-- | kernel/bpf/devmap.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index a936c704d4..4e2cdbb562 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -130,13 +130,14 @@ static int dev_map_init_map(struct bpf_dtab *dtab, union bpf_attr *attr) bpf_map_init_from_attr(&dtab->map, attr); if (attr->map_type == BPF_MAP_TYPE_DEVMAP_HASH) { - dtab->n_buckets = roundup_pow_of_two(dtab->map.max_entries); - - if (!dtab->n_buckets) /* Overflow check */ + /* 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 (dtab->map.max_entries > 1UL << 31) return -EINVAL; - } - if (attr->map_type == BPF_MAP_TYPE_DEVMAP_HASH) { + dtab->n_buckets = roundup_pow_of_two(dtab->map.max_entries); + dtab->dev_index_head = dev_map_create_hash(dtab->n_buckets, dtab->map.numa_node); if (!dtab->dev_index_head) |