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linux/tools/lib/bpf
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KP Singh fb2b0e2901 libbpf: Update light skeleton for signing 
* The metadata map is created with as an exclusive map (with an
excl_prog_hash) This restricts map access exclusively to the signed
loader program, preventing tampering by other processes.

* The map is then frozen, making it read-only from userspace.

* BPF_OBJ_GET_INFO_BY_ID instructs the kernel to compute the hash of the
  metadata map (H') and store it in bpf_map->sha.

* The loader is then loaded with the signature which is then verified by
  the kernel.

loading signed programs prebuilt into the kernel are not currently
supported. These can supported by enabling BPF_OBJ_GET_INFO_BY_ID to be
called from the kernel.

Signed-off-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/r/20250921160120.9711-3-kpsingh@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 		2025-09-22 19:17:25 -07:00
..
.gitignore tools build: Correct bpf fixdep dependencies 2024-08-05 12:19:48 -03:00
Build libbpf: Split field iter code into its own file kernel 2024-06-21 14:45:07 -07:00
Makefile tools: Remove redundant quiet setup 2025-02-18 16:27:43 -03:00
bpf.c bpf: Implement signature verification for BPF programs 2025-09-22 18:58:03 -07:00
bpf.h libbpf: Support exclusive map creation 2025-09-18 19:11:42 -07:00
bpf_core_read.h bpf: Fix uninitialized values in BPF_{CORE,PROBE}_READ 2025-05-05 14:20:28 -07:00
bpf_endian.h
…
bpf_gen_internal.h libbpf: Support creating light skeleton of either endianness 2024-10-03 17:47:36 -07:00
bpf_helpers.h libbpf: __arg_untrusted in bpf_helpers.h 2025-07-07 08:25:07 -07:00
bpf_prog_linfo.c
…
bpf_tracing.h libbpf: Fix some typos in comments 2024-09-09 16:05:40 -07:00
btf.c libbpf: Handle unsupported mmap-based /sys/kernel/btf/vmlinux correctly 2025-06-06 14:07:07 -07:00
btf.h libbpf: Add support for printing BTF character arrays as strings 2025-06-05 13:45:16 -07:00
btf_dump.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after rc3 2025-06-26 09:49:39 -07:00
btf_iter.c libbpf,bpf: Share BTF relocate-related code with kernel 2024-06-21 14:45:07 -07:00
btf_relocate.c libbpf: Fix incorrect traversal end type ID when marking BTF_IS_EMBEDDED 2025-01-16 15:34:18 -08:00
elf.c libbpf: Stringify errno in log messages in the remaining code 2024-11-11 20:29:45 -08:00
features.c libbpf: Stringify errno in log messages in the remaining code 2024-11-11 20:29:45 -08:00
gen_loader.c libbpf: Stringify errno in log messages in the remaining code 2024-11-11 20:29:45 -08:00
hashmap.c libbpf: Hashmap interface update to allow both long and void* keys/values 2022-11-09 20:45:14 -08:00
hashmap.h libbpf: Fix possible compiler warnings in hashmap 2024-10-11 12:36:59 -07:00
libbpf.c libbpf: Support exclusive map creation 2025-09-18 19:11:42 -07:00
libbpf.h libbpf: Support exclusive map creation 2025-09-18 19:11:42 -07:00
libbpf.map libbpf: Support exclusive map creation 2025-09-18 19:11:42 -07:00
libbpf.pc.template
…
libbpf_common.h libbpf: Fix potential uninitialized tail padding with LIBBPF_OPTS_RESET 2023-11-09 19:07:51 -08:00
libbpf_errno.c libbpf: Optimized return value in libbpf_strerror when errno is libbpf errno 2022-12-14 18:39:33 +01:00
libbpf_internal.h libbpf: Implement SHA256 internal helper 2025-09-18 19:11:42 -07:00
libbpf_legacy.h libbpf: Fix some typos in comments 2024-09-09 16:05:40 -07:00
libbpf_probes.c bpf: improve error message for unsupported helper 2024-03-28 18:30:53 -07:00
libbpf_version.h libbpf: start v1.7 dev cycle 2025-07-16 18:37:27 -07:00
linker.c libbpf: Use proper errno value in linker 2025-04-30 09:04:20 -07:00
netlink.c libbpf: Support creating and destroying qdisc 2025-04-17 10:54:41 -07:00
nlattr.c libbpf: Use proper errno value in nlattr 2025-05-12 15:22:54 -07:00
nlattr.h libbpf: add API to get XDP/XSK supported features 2023-02-02 20:48:24 -08:00
relo_core.c libbpf: fix LDX/STX/ST CO-RE relocation size adjustment logic 2025-02-14 19:58:05 -08:00
relo_core.h
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ringbuf.c libbpf: Stringify errno in log messages in the remaining code 2024-11-11 20:29:45 -08:00
skel_internal.h libbpf: Update light skeleton for signing 2025-09-22 19:17:25 -07:00
str_error.c libbpf: Add namespace for errstr making it libbpf_errstr 2025-03-21 13:44:54 -07:00
str_error.h libbpf: Add namespace for errstr making it libbpf_errstr 2025-03-21 13:44:54 -07:00
strset.c libbpf: Hashmap interface update to allow both long and void* keys/values 2022-11-09 20:45:14 -08:00
strset.h
…
usdt.bpf.h libbpf: Fix USDT SIB argument handling causing unrecognized register error 2025-08-27 15:44:25 -07:00
usdt.c libbpf: Remove unused args in parse_usdt_note 2025-09-04 11:35:44 -07:00
zip.c libbpf: Remove unneeded semicolon 2024-10-03 17:47:35 -07:00
zip.h libbpf: Implement basic zip archive parsing support 2023-03-01 16:05:34 -08:00