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| author |   Thomas Zimmermann <tzimmermann@suse.de> | 2024-03-25 21:11:58 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2024-03-25 21:11:58 +0100 |
| commit | 36a1818f5a1e50b805317ba13f827067d50f6970 (patch) | |
| tree | b9414b9509bea9f006c292a46a7632ffb57d18ee /kernel/bpf/stackmap.c | |
| parent | dma-buf: Fix NULL pointer dereference in sanitycheck() (diff) | |
| parent | Linux 6.9-rc1 (diff) | |
| download | wireguard-linux-36a1818f5a1e50b805317ba13f827067d50f6970.tar.xz wireguard-linux-36a1818f5a1e50b805317ba13f827067d50f6970.zip | |
Merge drm/drm-fixes into drm-misc-fixes
Backmerging to get drm-misc-fixes to the state of v6.9-rc1.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Diffstat (limited to '')
| -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 dff7ba539701..c99f8e5234ac 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) |