| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 15/73] selinux: initialize proto variable in selinux_ip_postroute_compat() | Date | Mon, 3 Jan 2022 15:23:36 +0100 |
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From: Tom Rix <trix@redhat.com>
commit 732bc2ff080c447f8524f40c970c481f5da6eed3 upstream.
Clang static analysis reports this warning
hooks.c:5765:6: warning: 4th function call argument is an uninitialized value if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
selinux_parse_skb() can return ok without setting proto. The later call to selinux_xfrm_postroute_last() does an early check of proto and can return ok if the garbage proto value matches. So initialize proto.
Cc: stable@vger.kernel.org Fixes: eef9b41622f2 ("selinux: cleanup selinux_xfrm_sock_rcv_skb() and selinux_xfrm_postroute_last()") Signed-off-by: Tom Rix <trix@redhat.com> [PM: typo/spelling and checkpatch.pl description fixes] Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- security/selinux/hooks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -5812,7 +5812,7 @@ static unsigned int selinux_ip_postroute struct common_audit_data ad; struct lsm_network_audit net = {0,}; char *addrp; - u8 proto; + u8 proto = 0; if (sk == NULL) return NF_ACCEPT;
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