When the no_new_privs parameter is given, thei size of the array which
contains the argv pointers is not increased in instance_jail_parse()
which causes a buffer overflow. Fix this by requesting one more entry in
instance_jail_parse() for the allocation.
Fixes: dfd5816bcbef ("instance, ujail: wire no_new_privs (-c) option")
Cc: Etienne CHAMPETIER <[email protected]>
Signed-off-by: Hauke Mehrtens <[email protected]>
---
service/instance.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/service/instance.c b/service/instance.c
index b4284e7..4bb2207 100644
--- a/service/instance.c
+++ b/service/instance.c
@@ -829,6 +829,9 @@ instance_jail_parse(struct service_instance *in, struct
blob_attr *attr)
if (in->seccomp)
jail->argc += 2;
+ if (in->no_new_privs)
+ jail->argc++;
+
return 1;
}
--
2.20.1
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