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| author |   McCabe, Robert J <robert.mccabe@rockwellcollins.com> | 2019-04-19 18:37:20 -0500 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-04-19 17:05:48 -0700 |
| commit | 4519efa6f8ea343e43ade21b0189b0b295439202 (patch) | |
| tree | 2172562ab6a1f435765957254b0ee7b85627d7cd /tools/lib/bpf/bpf.h | |
| parent | bpf: move BPF_PROG_TYPE_FLOW_DISSECTOR documentation to a new common place (diff) | |
| download | linux-dev-4519efa6f8ea343e43ade21b0189b0b295439202.tar.xz linux-dev-4519efa6f8ea343e43ade21b0189b0b295439202.zip | |
libbpf: fix BPF_LOG_BUF_SIZE off-by-one error
The BPF_PROG_LOAD condition for kernel version <= 5.1 is
log->len_total > UINT_MAX >> 8 /* (16 * 1024 * 1024) - 1 */
Signed-off-by: McCabe, Robert J <robert.mccabe@rockwellcollins.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib/bpf/bpf.h')
| -rw-r--r-- | tools/lib/bpf/bpf.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index bc30783d1403..ff2506fe6bd2 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -92,7 +92,7 @@ struct bpf_load_program_attr { #define MAPS_RELAX_COMPAT 0x01 /* Recommend log buffer size */ -#define BPF_LOG_BUF_SIZE (16 * 1024 * 1024) /* verifier maximum in kernels <= 5.1 */ +#define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */ LIBBPF_API int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr, char *log_buf, size_t log_buf_sz); |