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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-10-26 01:45:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:41 +0300 |
| commit | b5949ef0753be9b560482b8e6b9305c62c6d7830 (patch) | |
| tree | 02609bfe0a54492c830f4bc3ecbcfa13cc719c39 /tools/lib | |
| parent | af25dbc8460fe65eb0c913e365f682ee7d73cd60 (diff) | |
| download | linux-b5949ef0753be9b560482b8e6b9305c62c6d7830.tar.xz | |
libbpf: Fix off-by-one bug in bpf_core_apply_relo()
[ Upstream commit de5d0dcef602de39070c31c7e56c58249c56ba37 ]
Fix instruction index validity check which has off-by-one error.
Fixes: 3ee4f5335511 ("libbpf: Split bpf_core_apply_relo() into bpf_program independent helper.")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211025224531.1088894-2-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 51180f300d2e..7145463a4a56 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -5138,7 +5138,7 @@ static int bpf_core_apply_relo(struct bpf_program *prog, * relocated, so it's enough to just subtract in-section offset */ insn_idx = insn_idx - prog->sec_insn_off; - if (insn_idx > prog->insns_cnt) + if (insn_idx >= prog->insns_cnt) return -EINVAL; insn = &prog->insns[insn_idx]; |