| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 004/102] libbpf: Fix potential overflow issue | Date | Fri, 24 Jan 2020 10:30:05 +0100 |
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From: Andrii Nakryiko <andriin@fb.com>
commit 4ee1135615713387b869dfd099ffdf8656be6784 upstream.
Fix a potential overflow issue found by LGTM analysis, based on Github libbpf source code.
Fixes: 3d65014146c6 ("bpf: libbpf: Add btf_line_info support to libbpf") Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20191107020855.3834758-3-andriin@fb.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- tools/lib/bpf/bpf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -189,7 +189,7 @@ static void * alloc_zero_tailing_info(const void *orecord, __u32 cnt, __u32 actual_rec_size, __u32 expected_rec_size) { - __u64 info_len = actual_rec_size * cnt; + __u64 info_len = (__u64)actual_rec_size * cnt; void *info, *nrecord; int i;
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