linux/kernel/bpf
Daniel Borkmann f27f62fecd UPSTREAM: bpf: Add kconfig knob for disabling unpriv bpf by default
commit 08389d8882 upstream.

Add a kconfig knob which allows for unprivileged bpf to be disabled by default.
If set, the knob sets /proc/sys/kernel/unprivileged_bpf_disabled to value of 2.

This still allows a transition of 2 -> {0,1} through an admin. Similarly,
this also still keeps 1 -> {1} behavior intact, so that once set to permanently
disabled, it cannot be undone aside from a reboot.

We've also added extra2 with max of 2 for the procfs handler, so that an admin
still has a chance to toggle between 0 <-> 2.

Either way, as an additional alternative, applications can make use of CAP_BPF
that we added a while ago.

Bug: 215557547
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/74ec548079189e4e4dffaeb42b8987bb3c852eee.1620765074.git.daniel@iogearbox.net
Cc: Salvatore Bonaccorso <carnil@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 8c15bfb36a)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6d80853f0bd2c8618d956d967681c97b931a6137
2022-03-14 14:42:39 +01:00
..
preload bpf: Fix umd memory leak in copy_process() 2021-03-30 14:32:03 +02:00
arraymap.c bpf: Fix potential race in tail call compatibility check 2021-11-02 19:48:21 +01:00
bpf_inode_storage.c bpf: Change inode_storage's lookup_elem return value from NULL to -EBADF 2021-03-30 14:31:56 +02:00
bpf_iter.c
bpf_local_storage.c
bpf_lru_list.c
bpf_lru_list.h
bpf_lsm.c
bpf_struct_ops_types.h
bpf_struct_ops.c This is the 5.10.71 stable release 2021-10-06 17:33:06 +02:00
btf.c bpf: Forbid trampoline attach for functions with variable arguments 2021-06-16 12:01:35 +02:00
cgroup.c
core.c This is the 5.10.80 stable release 2021-11-19 11:50:41 +01:00
cpumap.c
devmap.c UPSTREAM: bpf: Fix integer overflow in argument calculation for bpf_map_area_alloc 2022-01-26 09:16:43 +00:00
disasm.c bpf: Introduce BPF nospec instruction for mitigating Spectre v4 2021-08-04 12:46:44 +02:00
disasm.h
dispatcher.c
hashtab.c bpf: Fix integer overflow involving bucket_size 2021-08-18 08:59:10 +02:00
helpers.c bpf: Fix potentially incorrect results with bpf_get_local_storage() 2021-09-03 10:09:31 +02:00
inode.c bpf: link: Refuse non-O_RDWR flags in BPF_OBJ_GET 2021-04-14 08:42:00 +02:00
local_storage.c bpf: Fix NULL pointer dereference in bpf_get_local_storage() helper 2021-09-03 10:09:21 +02:00
lpm_trie.c
Makefile
map_in_map.c
map_in_map.h
map_iter.c
net_namespace.c
offload.c
percpu_freelist.c
percpu_freelist.h
prog_iter.c
queue_stack_maps.c
reuseport_array.c
ringbuf.c bpf: Fix false positive kmemleak report in bpf_ringbuf_area_alloc() 2021-07-19 09:44:54 +02:00
stackmap.c bpf: Fix integer overflow in prealloc_elems_and_freelist() 2021-10-13 10:04:26 +02:00
syscall.c UPSTREAM: bpf: Add kconfig knob for disabling unpriv bpf by default 2022-03-14 14:42:39 +01:00
sysfs_btf.c
task_iter.c
tnum.c
trampoline.c Revert "Revert "bpf: Fix fexit trampoline."" 2021-04-09 21:09:04 -07:00
verifier.c This is the 5.10.80 stable release 2021-11-19 11:50:41 +01:00