CIL permits not assigning a context to a SID, e.g. to an unused initial SID, e.g. 'any_socket'. When using the example policy from the SELinux Notebook, https://github.com/SELinuxProject/selinux-notebook/blob/main/src/notebook-examples/cil-policy/cil-policy.cil, secilc logs: No context assigned to SID any_socket, omitting from policy at cil-policy.cil:166 But secil2conf segfaults when writing the policy.conf: ../cil/src/cil_policy.c:274:2: runtime error: member access within null pointer of type 'struct cil_context' Only print the assigned context if actually available. Signed-off-by: Christian Göttsche <cgzones@xxxxxxxxxxxxxx> --- libsepol/cil/src/cil_policy.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libsepol/cil/src/cil_policy.c b/libsepol/cil/src/cil_policy.c index 30d507f1..863636c7 100644 --- a/libsepol/cil/src/cil_policy.c +++ b/libsepol/cil/src/cil_policy.c @@ -1661,7 +1661,9 @@ static void cil_sid_contexts_to_policy(FILE *out, struct cil_list *sids, int mls cil_list_for_each(i1, sids) { sid = i1->data; fprintf(out, "sid %s ", sid->datum.fqn); - cil_context_to_policy(out, sid->context, mls); + if (sid->context) { + cil_context_to_policy(out, sid->context, mls); + } fprintf(out,"\n"); } } -- 2.30.1
