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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-11 09:28:39 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-11 09:28:39 +0100 |
| commit | 15e99b13b44bd969b085f866fb4d5dc72f65d2d0 (patch) | |
| tree | 6af5d0b1c225400d2c1df9951d6b8d85b6329f8f /kernel/bpf/syscall.c | |
| parent | 81534d5fa973fc10a48c245c08688e61ffe41366 (diff) | |
| parent | d13937116f1e82bf508a6325111b322c30c85eb9 (diff) | |
| download | linux-stable-15e99b13b44bd969b085f866fb4d5dc72f65d2d0.tar.gz linux-stable-15e99b13b44bd969b085f866fb4d5dc72f65d2d0.tar.bz2 linux-stable-15e99b13b44bd969b085f866fb4d5dc72f65d2d0.zip | |
Merge 5.0-rc6 into usb-next
We need the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/bpf/syscall.c')
| -rw-r--r-- | kernel/bpf/syscall.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index b155cd17c1bd..8577bb7f8be6 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -713,8 +713,13 @@ static int map_lookup_elem(union bpf_attr *attr) if (bpf_map_is_dev_bound(map)) { err = bpf_map_offload_lookup_elem(map, key, value); - } else if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || - map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) { + goto done; + } + + preempt_disable(); + this_cpu_inc(bpf_prog_active); + if (map->map_type == BPF_MAP_TYPE_PERCPU_HASH || + map->map_type == BPF_MAP_TYPE_LRU_PERCPU_HASH) { err = bpf_percpu_hash_copy(map, key, value); } else if (map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY) { err = bpf_percpu_array_copy(map, key, value); @@ -744,7 +749,10 @@ static int map_lookup_elem(union bpf_attr *attr) } rcu_read_unlock(); } + this_cpu_dec(bpf_prog_active); + preempt_enable(); +done: if (err) goto free_value; |