diff options
| author | Maciej Żenczykowski <maze@google.com> | 2020-06-20 14:26:16 -0700 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2020-06-30 11:28:11 +0530 |
| commit | b069e9bd7ab1e7a69163152cb062e8733f3fa78e (patch) | |
| tree | 84a8911542b2a0026ec2522c0cb21d35c197143c | |
| parent | ccafd1ebc8f1fb2d331e402b052a5eaeb0ace6ac (diff) | |
restore behaviour of CAP_SYS_ADMIN allowing the loading of networking bpf programs
This is a fix for a regression introduced in 5.8-rc1 by:
commit 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366
'bpf: Implement CAP_BPF'
Before the above commit it was possible to load network bpf programs
with just the CAP_SYS_ADMIN privilege.
The Android bpfloader happens to run in such a configuration (it has
SYS_ADMIN but not NET_ADMIN) and creates maps and loads bpf programs
for later use by Android's netd (which has NET_ADMIN but not SYS_ADMIN).
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Reported-by: John Stultz <john.stultz@linaro.org>
Fixes: 2c78ee898d8f ("bpf: Implement CAP_BPF")
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
| -rw-r--r-- | kernel/bpf/syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 8da159936bab..7d946435587d 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2121,7 +2121,7 @@ static int bpf_prog_load(union bpf_attr *attr, union bpf_attr __user *uattr) !bpf_capable()) return -EPERM; - if (is_net_admin_prog_type(type) && !capable(CAP_NET_ADMIN)) + if (is_net_admin_prog_type(type) && !capable(CAP_NET_ADMIN) && !capable(CAP_SYS_ADMIN)) return -EPERM; if (is_perfmon_prog_type(type) && !perfmon_capable()) return -EPERM; |