diff options
| author | Andrii Nakryiko <[email protected]> | 2020-09-04 04:16:11 +0000 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2020-09-04 12:35:12 +0000 |
| commit | 8eb629585d2231e90112148009e2a11b0979ca38 (patch) | |
| tree | 94ba49d2e25651fd880da37ce6e3252c3bd294fa /tools/lib/bpf/libbpf.c | |
| parent | libbpf: Fix another __u64 cast in printf (diff) | |
| download | kernel-8eb629585d2231e90112148009e2a11b0979ca38.tar.gz kernel-8eb629585d2231e90112148009e2a11b0979ca38.zip | |
libbpf: Fix potential multiplication overflow
Detected by LGTM static analyze in Github repo, fix potential multiplication
overflow before result is casted to size_t.
Fixes: 8505e8709b5e ("libbpf: Implement generalized .BTF.ext func/line info adjustment")
Signed-off-by: Andrii Nakryiko <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'tools/lib/bpf/libbpf.c')
| -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 53be32a2b9fc..550950eb1860 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -5802,7 +5802,7 @@ static int adjust_prog_btf_ext_info(const struct bpf_object *obj, /* append func/line info of a given (sub-)program to the main * program func/line info */ - old_sz = (*prog_rec_cnt) * ext_info->rec_size; + old_sz = (size_t)(*prog_rec_cnt) * ext_info->rec_size; new_sz = old_sz + (copy_end - copy_start); new_prog_info = realloc(*prog_info, new_sz); if (!new_prog_info) |