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| author | Friedrich Vock <friedrich.vock@gmx.de> | 2024-05-14 09:09:31 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2024-05-24 17:12:12 +0200 |
| commit | 44382b3ed6b2787710c8ade06c0e97f5970a47c8 (patch) | |
| tree | ffd66a523cd4888ffba95883d30df99f22a9fb7d /tools/bpf/resolve_btfids | |
| parent | 8d00547ea8754afdc4a550af2fb7af2e3ba93cf8 (diff) | |
| download | linux-44382b3ed6b2787710c8ade06c0e97f5970a47c8.tar.gz linux-44382b3ed6b2787710c8ade06c0e97f5970a47c8.tar.bz2 linux-44382b3ed6b2787710c8ade06c0e97f5970a47c8.zip | |
bpf: Fix potential integer overflow in resolve_btfids
err is a 32-bit integer, but elf_update returns an off_t, which is 64-bit
at least on 64-bit platforms. If symbols_patch is called on a binary between
2-4GB in size, the result will be negative when cast to a 32-bit integer,
which the code assumes means an error occurred. This can wrongly trigger
build failures when building very large kernel images.
Fixes: fbbb68de80a4 ("bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object")
Signed-off-by: Friedrich Vock <friedrich.vock@gmx.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240514070931.199694-1-friedrich.vock@gmx.de
Diffstat (limited to 'tools/bpf/resolve_btfids')
| -rw-r--r-- | tools/bpf/resolve_btfids/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c index d9520cb826b3..af393c7dee1f 100644 --- a/tools/bpf/resolve_btfids/main.c +++ b/tools/bpf/resolve_btfids/main.c @@ -728,7 +728,7 @@ static int sets_patch(struct object *obj) static int symbols_patch(struct object *obj) { - int err; + off_t err; if (__symbols_patch(obj, &obj->structs) || __symbols_patch(obj, &obj->unions) || |