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8defab8bdfb1d0dc4e4e3c687cfde33b596896f7
linux/tools/lib/bpf
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Shung-Hsi Yu d0d382f95a libbpf: Fix null-pointer dereference in find_prog_by_sec_insn() 
When there are no program sections, obj->programs is left unallocated,
and find_prog_by_sec_insn()'s search lands on &obj->programs[0] == NULL,
and will cause null-pointer dereference in the following access to
prog->sec_idx.

Guard the search with obj->nr_programs similar to what's being done in
__bpf_program__iter() to prevent null-pointer access from happening.

Fixes: db2b8b0642 ("libbpf: Support CO-RE relocations for multi-prog sections")
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221012022353.7350-4-shung-hsi.yu@suse.com
2022-10-13 10:53:34 -07:00
..
.gitignore
libbpf: Make libbpf_version.h non-auto-generated
2021-09-13 15:36:47 -07:00
bpf_core_read.h
libbpf: add bpf_core_type_matches() helper macro
2022-07-05 21:15:19 -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
Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-12-10 15:56:13 -08:00
bpf_helpers.h
libbpf: Clean up legacy bpf maps declaration in bpf_helpers
2022-09-16 22:56:09 +02:00
bpf_prog_linfo.c
libbpf: Streamline error reporting for high-level APIs
2021-05-25 17:32:35 -07:00
bpf_tracing.h
libbpf: Improve BPF_PROG2 macro code quality and description
2022-09-21 17:05:31 -07:00
bpf.c
libbpf: Introduce bpf_link_get_fd_by_id_opts()
2022-10-10 16:49:20 -07:00
bpf.h
libbpf: Introduce bpf_link_get_fd_by_id_opts()
2022-10-10 16:49:20 -07:00
btf_dump.c
libbpf: Fix use-after-free in btf_dump_name_dups
2022-10-13 10:53:03 -07:00
btf.c
libbpf: Fix the case of running as non-root with capabilities
2022-09-26 21:38:32 -07:00
btf.h
libbpf: Don't require full struct enum64 in UAPI headers
2022-09-27 20:45:17 +02:00
Build
libbpf: move xsk.{c,h} into selftests/bpf
2022-06-28 13:13:32 -07:00
gen_loader.c
libbpf: fix an snprintf() overflow check
2022-07-19 10:47:31 -07:00
hashmap.c
libbpf: Use IS_ERR_OR_NULL() in hashmap__free()
2022-01-12 17:01:36 -08:00
hashmap.h
libbpf, hashmap: Fix undefined behavior in hash_bits
2020-11-02 23:33:51 +01:00
libbpf_common.h
libbpf: cleanup LIBBPF_DEPRECATED_SINCE supporting macros for v0.x
2022-06-28 13:13:33 -07:00
libbpf_errno.c
libbpf: Streamline error reporting for high-level APIs
2021-05-25 17:32:35 -07:00
libbpf_internal.h
libbpf: Making bpf_prog_load() ignore name if kernel doesn't support
2022-08-15 14:58:20 -07:00
libbpf_legacy.h
libbpf: Clean up deprecated and legacy aliases
2022-08-17 22:42:56 +02:00
libbpf_probes.c
bpf: Add libbpf logic for user-space ring buffer
2022-09-21 16:25:03 -07:00
libbpf_version.h
bpf: Add libbpf logic for user-space ring buffer
2022-09-21 16:25:03 -07:00
libbpf.c
libbpf: Fix null-pointer dereference in find_prog_by_sec_insn()
2022-10-13 10:53:34 -07:00
libbpf.h
libbpf: restore memory layout of bpf_object_open_opts
2022-09-23 16:19:37 -07:00
libbpf.map
libbpf: Introduce bpf_link_get_fd_by_id_opts()
2022-10-10 16:49:20 -07:00
libbpf.pc.template
libbpf: Add zlib as a dependency in pkg-config template
2019-12-16 14:55:29 -08:00
linker.c
libbpf: Add enum64 support for bpf linking
2022-06-07 10:20:43 -07:00
Makefile
libbpf: move xsk.{c,h} into selftests/bpf
2022-06-28 13:13:32 -07:00
netlink.c
libbpf: Streamline bpf_attr and perf_event_attr initialization
2022-08-17 22:42:10 +02:00
nlattr.c
libbpf: Fix overrun in netlink attribute iteration
2022-09-30 15:16:22 -07:00
nlattr.h
libbpf: Switch to void * casting in netlink helpers
2021-06-22 17:04:02 +02:00
relo_core.c
bpf: Correctly propagate errors up from bpf_core_composites_match
2022-07-08 15:31:43 -07:00
relo_core.h
bpf, libbpf: Add type match support
2022-07-05 21:14:25 -07:00
ringbuf.c
bpf: Add libbpf logic for user-space ring buffer
2022-09-21 16:25:03 -07:00
skel_internal.h
libbpf: add map_get_fd_by_id and map_delete_elem in light skeleton
2022-08-25 18:52:29 -07:00
str_error.c
libbpf: Poison kernel-only integer types
2020-01-10 10:38:00 -08:00
str_error.h
libbpf: relicense libbpf as LGPL-2.1 OR BSD-2-Clause
2018-10-08 10:09:48 +02:00
strset.c
libbpf: Fix memory leak in strset
2021-10-01 22:54:38 +02:00
strset.h
libbpf: Extract internal set-of-strings datastructure APIs
2021-03-18 16:14:22 -07:00
usdt.bpf.h
libbpf: Ensure functions with always_inline attribute are inline
2022-08-04 14:43:41 -07:00
usdt.c
libbpf: Fix memory leak in parse_usdt_arg()
2022-10-13 10:53:18 -07:00