Chenbo Feng c9ea2f8af6 bpf: skip unnecessary capability check ...

commit 0fa4fe85f4724fff89b09741c437cbee9cf8b008 upstream.

The current check statement in BPF syscall will do a capability check
for CAP_SYS_ADMIN before checking sysctl_unprivileged_bpf_disabled. This
code path will trigger unnecessary security hooks on capability checking
and cause false alarms on unprivileged process trying to get CAP_SYS_ADMIN
access. This can be resolved by simply switch the order of the statement
and CAP_SYS_ADMIN is not required anyway if unprivileged bpf syscall is
allowed.

Signed-off-by: Chenbo Feng <fengc@google.com>
Acked-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-03-28 18:40:17 +02:00

..

arraymap.c

…

core.c

…

hashtab.c

…

helpers.c

…

inode.c

…

Makefile

…

syscall.c

bpf: skip unnecessary capability check

2018-03-28 18:40:17 +02:00

verifier.c

bpf: fix incorrect sign extension in check_alu_op()

2018-03-22 09:23:32 +01:00