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Reject invalid object types that can not be used with specific opcodes.

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When we doing reference counting of named objects in the new rule,
for existing objects check that opcode references to correct object,
otherwise return EINVAL.

PR:		217391
MFC after:	1 week
Sponsored by:	Yandex LLC
This commit is contained in:
Andrey V. Elsukov 2017-03-05 22:19:43 +00:00
parent 27ca6260e0
commit c750a56914
1 changed files with 8 additions and 1 deletions
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9
sys/netpfil/ipfw/ip_fw_sockopt.c
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@ -2669,7 +2669,14 @@ ref_opcode_object(struct ip_fw_chain *ch, ipfw_insn *cmd, struct tid_info *ti,
return (0);
}
/* Found. Bump refcount and update kidx. */
/*
* Object is already exist.
* Its subtype should match with expected value.
*/
if (ti->type != no->subtype)
return (EINVAL);
/* Bump refcount and update kidx. */
no->refcnt++;
rw->update(cmd, no->kidx);
return (0);