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Muralidhara M KandIlpo Järvinen
d20457b46e
Although validate_message() checks msg_id, a mispredicted branch can still allow speculative indexing into hsmp_msg_desc_table[]. Clamp msg.msg_id with array_index_nospec() at entry to hsmp_ioctl_msg() so downstream dereferences (including via is_get_msg() and hsmp_send_message()) see a bounded index. Similarly, hsmp_send_message() bounds-checks msg->sock_ind before indexing hsmp_pdev.sock[], but a mispredicted branch can still speculatively use the raw index (Spectre v1, CVE-2017-5753). Apply array_index_nospec() after the check so every caller that reaches hsmp_pdev.sock[] through this helper sees a clamped socket index—including hsmp_ioctl_msg() and any other path that hands a user-derived struct hsmp_message to hsmp_send_message(). Reviewed-by: Muthusamy Ramalingam <muthusamy.ramalingam@amd.com> Signed-off-by: Muralidhara M K <muralidhara.mk@amd.com> Link: https://patch.msgid.link/20260612042610.1629037-7-muralidhara.mk@amd.com Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>