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linux/tools/lib/bpf
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Andrii Nakryiko b28c6712af libbpf: Fix hypothetical STT_SECTION extern NULL deref case 
[ Upstream commit e0525cd72b ]

Fix theoretical NULL dereference in linker when resolving *extern*
STT_SECTION symbol against not-yet-existing ELF section. Not sure if
it's possible in practice for valid ELF object files (this would require
embedded assembly manipulations, at which point BTF will be missing),
but fix the s/dst_sym/dst_sec/ typo guarding this condition anyways.

Fixes: faf6ed321c ("libbpf: Add BPF static linker APIs")
Fixes: a46349227c ("libbpf: Add linker extern resolution support for functions and global variables")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20250220002821.834400-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-04-10 14:31:59 +02:00
..
.gitignore libbpf: Stop using feature-detection Makefiles 2021-02-04 01:22:00 +01:00
bpf.c libbpf: Fix lookup_and_delete_elem_flags error reporting 2021-11-18 19:17:09 +01:00
bpf.h libbpf: Avoid enum forward-declarations in public API in C++ mode 2022-12-31 13:14:43 +01:00
bpf_core_read.h bpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD 2024-07-18 13:07:29 +02:00
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: Cleanup temp FDs when intermediate sys_bpf fails. 2021-05-19 00:40:44 +02:00
bpf_helpers.h libbpf: fix offsetof() and container_of() to work with CO-RE 2023-07-23 13:46:49 +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: Fail compilation if target arch is missing 2021-06-16 20:15:30 -07:00
btf.c libbpf: Fix btf__align_of() by taking into account field offsets 2023-03-10 09:39:06 +01:00
btf.h libbpf: Fix potential misaligned memory access in btf_ext__new() 2022-01-27 11:03:16 +01:00
btf_dump.c libbpf: Fix no-args func prototype BTF dumping syntax 2024-08-19 05:45:23 +02:00
Build libbpf: Split CO-RE logic into relo_core.c. 2021-07-26 12:29:14 -07:00
gen_loader.c libbpf: fix an snprintf() overflow check 2022-08-17 14:23:32 +02:00
hashmap.c libbpf: Centralize poisoning and poison reallocarray() 2020-08-18 18:38:25 -07:00
hashmap.h libbpf, hashmap: Fix undefined behavior in hash_bits 2020-11-02 23:33:51 +01:00
libbpf.c libbpf: fix sym_is_subprog() logic for weak global subprogs 2024-12-14 19:50:54 +01:00
libbpf.h libbpf: Add uprobe ref counter offset support for USDT semaphores 2021-08-17 00:45:08 +02:00
libbpf.map libbpf: Add bpf_cookie to perf_event, kprobe, uprobe, and tp attach APIs 2021-08-17 00:45:08 +02:00
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: Implement generalized .BTF.ext func/line info adjustment 2020-09-03 17:14:40 -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: Add bpf_cookie support to bpf_link_create() API 2021-08-17 00:45:08 +02:00
libbpf_legacy.h libbpf: Streamline error reporting for low-level APIs 2021-05-25 17:32:35 -07:00
libbpf_probes.c libbpf: Use page size as max_entries when probing ring buffer map 2022-12-19 12:36:41 +01:00
linker.c libbpf: Fix hypothetical STT_SECTION extern NULL deref case 2025-04-10 14:31:59 +02:00
Makefile libbpf: Fix build issue with llvm-readelf 2022-04-13 20:59:03 +02:00
netlink.c libbpf: Fix memleak in libbpf_netlink_recv() 2022-04-08 14:23:31 +02:00
nlattr.c libbpf: Fix alen calculation in libbpf_nla_dump_errormsg() 2023-03-10 09:39:16 +01:00
nlattr.h libbpf: Switch to void * casting in netlink helpers 2021-06-22 17:04:02 +02:00
relo_core.c libbpf: Split CO-RE logic into relo_core.c. 2021-07-26 12:29:14 -07:00
relo_core.h libbpf: Split CO-RE logic into relo_core.c. 2021-07-26 12:29:14 -07:00
ringbuf.c libbpf: Handle size overflow for ringbuf mmap 2022-12-08 11:28:39 +01:00
skel_internal.h libbpf: Fix skel_internal.h to set errno on loader retval < 0 2021-11-18 19:16:27 +01:00
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
xsk.c selftests/xsk: Avoid use-after-free on ctx 2022-10-26 12:34:41 +02:00
xsk.h libbpf: xsk: Move barriers from libbpf_util.h to xsk.h 2021-03-10 13:45:16 -08:00