LIRC_MODE2 does not really need net_admin capability, but only sys_admin.
Extract a new helper for it, it will be also used for the HID bpf implementation.
Cc: Sean Young sean@mess.org Acked-by: Sean Young sean@mess.org Signed-off-by: Benjamin Tissoires benjamin.tissoires@redhat.com
---
changes in v3: - dropped BPF_PROG_TYPE_EXT from the new helper
new in v2 --- kernel/bpf/syscall.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 9beb585be5a6..b88688264ad0 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2165,7 +2165,6 @@ static bool is_net_admin_prog_type(enum bpf_prog_type prog_type) case BPF_PROG_TYPE_LWT_SEG6LOCAL: case BPF_PROG_TYPE_SK_SKB: case BPF_PROG_TYPE_SK_MSG: - case BPF_PROG_TYPE_LIRC_MODE2: case BPF_PROG_TYPE_FLOW_DISSECTOR: case BPF_PROG_TYPE_CGROUP_DEVICE: case BPF_PROG_TYPE_CGROUP_SOCK: @@ -2202,6 +2201,16 @@ static bool is_perfmon_prog_type(enum bpf_prog_type prog_type) } }
+static bool is_sys_admin_prog_type(enum bpf_prog_type prog_type) +{ + switch (prog_type) { + case BPF_PROG_TYPE_LIRC_MODE2: + return true; + default: + return false; + } +} + /* last field in 'union bpf_attr' used by this command */ #define BPF_PROG_LOAD_LAST_FIELD core_relo_rec_size
@@ -2252,6 +2261,8 @@ static int bpf_prog_load(union bpf_attr *attr, bpfptr_t uattr) return -EPERM; if (is_perfmon_prog_type(type) && !perfmon_capable()) return -EPERM; + if (is_sys_admin_prog_type(type) && !capable(CAP_SYS_ADMIN)) + return -EPERM;
/* attach_prog_fd/attach_btf_obj_fd can specify fd of either bpf_prog * or btf, we need to check which one it is