From: Weixie Cui Date: Sat, 21 Mar 2026 06:08:00 +0000 (+0800) Subject: bpf: propagate kvmemdup_bpfptr errors from bpf_prog_verify_signature X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ad2f7ed0ee91d63792cbe52f2b38325918ae3daa;p=thirdparty%2Flinux.git bpf: propagate kvmemdup_bpfptr errors from bpf_prog_verify_signature kvmemdup_bpfptr() returns -EFAULT when the user pointer cannot be copied, and -ENOMEM on allocation failure. The error path always returned -ENOMEM, misreporting bad addresses as out-of-memory. Return PTR_ERR(sig) so user space gets the correct errno. Signed-off-by: Weixie Cui Acked-by: Jiri Olsa Link: https://lore.kernel.org/r/tencent_C9C5B2B28413D6303D505CD02BFEA4708C07@qq.com Signed-off-by: Alexei Starovoitov --- diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 274039e36465d..51ade3cde8bb3 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2832,7 +2832,7 @@ static int bpf_prog_verify_signature(struct bpf_prog *prog, union bpf_attr *attr sig = kvmemdup_bpfptr(usig, attr->signature_size); if (IS_ERR(sig)) { bpf_key_put(key); - return -ENOMEM; + return PTR_ERR(sig); } bpf_dynptr_init(&sig_ptr, sig, BPF_DYNPTR_TYPE_LOCAL, 0,