On 4/18/18 9:33 PM, Alexei Starovoitov wrote:
On Wed, Apr 18, 2018 at 09:54:38AM -0700, Yonghong Song wrote:
The special property of return values for helpers bpf_get_stack
and bpf_probe_read_str are captured in verifier.
Both helpers return a negative error code or
a length, which is equal
On Wed, Apr 18, 2018 at 09:54:38AM -0700, Yonghong Song wrote:
> The special property of return values for helpers bpf_get_stack
> and bpf_probe_read_str are captured in verifier.
> Both helpers return a negative error code or
> a length, which is equal to or smaller than the buffer
> size
The special property of return values for helpers bpf_get_stack
and bpf_probe_read_str are captured in verifier.
Both helpers return a negative error code or
a length, which is equal to or smaller than the buffer
size argument. This additional information in the
verifier can avoid the condition
