diff options
| author | Weixie Cui <cuiweixie@gmail.com> | 2026-03-21 14:08:00 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-03-24 08:48:51 -0700 |
| commit | ad2f7ed0ee91d63792cbe52f2b38325918ae3daa (patch) | |
| tree | 0d5ec60b82c4ea9840707240e87c06d83397e1bd /kernel | |
| parent | 280de43e88c0ed3ac453dde05ccb7e72dca01780 (diff) | |
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 <cuiweixie@gmail.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/tencent_C9C5B2B28413D6303D505CD02BFEA4708C07@qq.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/syscall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 274039e36465..51ade3cde8bb 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, |