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linux/tools/lib/bpf
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Nandakumar Edamana 2c600cbe33 libbpf: Fix out-of-bound read 
[ Upstream commit 236d391011 ]

In `set_kcfg_value_str`, an untrusted string is accessed with the assumption
that it will be at least two characters long due to the presence of checks for
opening and closing quotes. But the check for the closing quote
(value[len - 1] != '"') misses the fact that it could be checking the opening
quote itself in case of an invalid input that consists of just the opening
quote.

This commit adds an explicit check to make sure the string is at least two
characters long.

Signed-off-by: Nandakumar Edamana <nandakumar@nandakumar.co.in>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250221210110.3182084-1-nandakumar@nandakumar.co.in
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-05-29 11:02:39 +02:00
..
.gitignore tools build: Correct bpf fixdep dependencies 2024-08-05 12:19:48 -03:00
bpf.c libbpf: fix feature detectors when using token_fd 2024-05-15 09:34:53 -07:00
bpf.h libbpf: fix some typos in libbpf 2024-09-05 13:07:47 -07:00
bpf_core_read.h bpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD 2024-05-08 15:00:55 -07:00
bpf_endian.h libbpf: Make bpf_endian co-exist with vmlinux.h 2020-07-01 09:06:12 +02:00
bpf_gen_internal.h libbpf: Support kfunc detection in light skeleton. 2023-03-22 09:31:05 -07:00
bpf_helpers.h libbpf: Fix some typos in comments 2024-09-09 16:05:40 -07:00
bpf_prog_linfo.c libbpf: Streamline error reporting for high-level APIs 2021-05-25 17:32:35 -07:00
bpf_tracing.h libbpf: Fix some typos in comments 2024-09-09 16:05:40 -07:00
btf.c libbpf: Fix return zero when elf_begin failed 2025-02-08 09:57:34 +01:00
btf.h libbpf: Fix some typos in comments 2024-09-09 16:05:40 -07:00
btf_dump.c libbpf: Prevent compiler warnings/errors 2025-04-20 10:16:01 +02:00
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 2025-02-08 09:57:34 +01:00
Build libbpf: Split field iter code into its own file kernel 2024-06-21 14:45:07 -07:00
elf.c libbpf: Workaround -Wmaybe-uninitialized false positive 2024-08-15 15:56:40 -07:00
features.c libbpf: don't close(-1) in multi-uprobe feature detector 2024-05-31 14:56:51 -07:00
gen_loader.c libbpf: Store zero fd to fd_array for loader kfunc relocation 2023-05-16 22:09:23 -07:00
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: Remove HASHMAP_INIT static initialization helper 2023-07-11 09:40:05 -07:00
libbpf.c libbpf: Fix out-of-bound read 2025-05-29 11:02:39 +02:00
libbpf.h libbpf: Add bpf_object__token_fd accessor 2024-09-12 19:07:13 -07:00
libbpf.map libbpf: Add bpf_object__token_fd accessor 2024-09-12 19:07:13 -07:00
libbpf.pc.template libbpf: Add zlib as a dependency in pkg-config template 2019-12-16 14:55:29 -08:00
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: Split BTF relocation 2024-06-17 14:38:31 -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 v1.5 development cycle 2024-04-06 09:11:10 -07:00
linker.c libbpf: Fix hypothetical STT_SECTION extern NULL deref case 2025-04-10 14:39:18 +02:00
Makefile libbpf: Add missing per-arch include path 2024-12-05 14:01:42 +01:00
netlink.c libbpf: Use OPTS_SET() macro in bpf_xdp_query() 2024-02-06 09:51:26 -08:00
nlattr.c libbpf: Fix alen calculation in libbpf_nla_dump_errormsg() 2023-02-10 15:27:22 -08:00
nlattr.h libbpf: add API to get XDP/XSK supported features 2023-02-02 20:48:24 -08:00
relo_core.c libbpf: fix signedness determination in CO-RE relo handling logic 2023-08-23 21:13:48 -07:00
relo_core.h bpf, libbpf: Add type match support 2022-07-05 21:14:25 -07:00
ringbuf.c libbpf: fix ring_buffer__consume_n() return result logic 2024-05-02 16:41:03 -07:00
skel_internal.h libbpf: Fix some typos in comments 2024-09-09 16:05:40 -07:00
str_error.c libbpf: fix libbpf_strerror_r() handling unknown errors 2024-05-07 16:21:59 -07:00
str_error.h libbpf: Move feature detection code into its own file 2024-01-24 16:21:02 -08:00
strset.c libbpf: Hashmap interface update to allow both long and void* keys/values 2022-11-09 20:45:14 -08:00
strset.h libbpf: Extract internal set-of-strings datastructure APIs 2021-03-18 16:14:22 -07:00
usdt.bpf.h libbpf: fix some typos in libbpf 2024-09-05 13:07:47 -07:00
usdt.c libbpf: don't adjust USDT semaphore address if .stapsdt.base addr is missing 2025-02-08 09:57:26 +01:00
zip.c libbpf: Ignore warnings about "inefficient alignment" 2023-03-16 18:20:08 +01:00
zip.h libbpf: Implement basic zip archive parsing support 2023-03-01 16:05:34 -08:00