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Explicitly narrow size argument for BPF

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This fixes a build error introduced in 26da6e6b0a.

PiperOrigin-RevId: 414408033
Change-Id: Ic34d5eeba3bb34f9a5ce46a05547129fbab8bce0
This commit is contained in:
Christian Blichmann 2021-12-06 04:50:59 -08:00 committed by Copybara-Service
parent 4e6cafa934
commit 60eb52c17f
1 changed files with 4 additions and 2 deletions
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6
sandboxed_api/sandbox2/policybuilder.cc
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@ -742,7 +742,8 @@ PolicyBuilder& PolicyBuilder::AddPolicyOnSyscalls(
// over it. // over it.
if (last) { if (last) {
if (out.size() > kMaxShortJump) { if (out.size() > kMaxShortJump) {
out.push_front(BPF_STMT(BPF_JMP + BPF_JA, out.size())); out.push_front(
BPF_STMT(BPF_JMP + BPF_JA, static_cast<uint32_t>(out.size())));
} else { } else {
jf = out.size(); jf = out.size();
} }
@ -751,7 +752,8 @@ PolicyBuilder& PolicyBuilder::AddPolicyOnSyscalls(
// Add a helper absolute jump if needed - the policy/last helper jump is // Add a helper absolute jump if needed - the policy/last helper jump is
// out of reach of a short jump. // out of reach of a short jump.
if ((out.size() - do_policy_loc) > kMaxShortJump) { if ((out.size() - do_policy_loc) > kMaxShortJump) {
out.push_front(BPF_STMT(BPF_JMP + BPF_JA, out.size() - policy.size())); out.push_front(BPF_STMT(
BPF_JMP + BPF_JA, static_cast<uint32_t>(out.size() - policy.size())));
do_policy_loc = out.size(); do_policy_loc = out.size();
++jf; ++jf;
} }