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-rw-r--r--pkg/sentry/kernel/seccomp.go3
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/sentry/kernel/seccomp.go b/pkg/sentry/kernel/seccomp.go
index cec179246..4bed4d373 100644
--- a/pkg/sentry/kernel/seccomp.go
+++ b/pkg/sentry/kernel/seccomp.go
@@ -75,6 +75,9 @@ func (t *Task) checkSeccompSyscall(sysno int32, args arch.SyscallArguments, ip u
// portion of the return value will be passed as si_errno." -
// Documentation/prctl/seccomp_filter.txt
t.SendSignal(seccompSiginfo(t, int32(result.Data()), sysno, ip))
+ // "The return value register will contain an arch-dependent value." In
+ // practice, it's ~always the syscall number.
+ t.Arch().SetReturn(uintptr(sysno))
case linux.SECCOMP_RET_ERRNO:
// "Results in the lower 16-bits of the return value being passed to