netfilter: nf_conntrack_sip: fix off-by-one in compact header parsing



In a string like "v:SIP/2.0..." it was checking for !isalpha('S') when it
meant to be inspecting the ':'.

Patch by Greg Alexander <greqcs@galexander.org>

Signed-off-by: Patrick McHardy <kaber@trash.net>

parent dce766af

net/netfilter/nf_conntrack_sip.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -376,7 +376,7 @@ int ct_sip_get_header(const struct nf_conn ct, const char dptr,
		dptr += hdr->len;
		else if (hdr->cname && limit - dptr >= hdr->clen + 1 &&
		strnicmp(dptr, hdr->cname, hdr->clen) == 0 &&
		!isalpha(*(dptr + hdr->clen + 1)))
		!isalpha(*(dptr + hdr->clen)))
		dptr += hdr->clen;
		else
		continue;