nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()

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nfc_llcp_wks_sap() compares only service_name_len bytes, so a short
service_name like "u" matches longer WKS strings like "urn:nfc:sn:snep".
Fix by requiring exact length match before strncmp().

Fixes: d646960f79 ("NFC: Initial LLCP support")
Signed-off-by: Ömer Mete Kaya <omermetekaya0@gmail.com>
Link: https://patch.msgid.link/20260909121437.33744-1-omermetekaya0@gmail.com
Signed-off-by: David Heidelberg <david@ixit.cz>

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Ömer Mete Kaya 2026-09-09 15:14:31 +03:00 • committed by David Heidelberg

parent c04981e42d

commit 408cff6bd6

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net/nfc/llcp_core.c

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