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ACS: Be more consistent with iface->current_mode checks

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Offloading of ACS to the driver changed the design a bit in a way that
iface->current_mode could actually be NULL when the offloaded ACS
mechanism supports band selection in addition to channel selection. This
resulted in a combination that is too complex for static analyzers to
notice. While acs_init() can be called with iface->current_mode == NULL
that is only in the case where WPA_DRIVER_FLAGS_ACS_OFFLOAD is in use.
In other words, the actual ACS functions like acs_cleanup() that would
dereference iface->current_mode are not used in such a case.

Get rid of static analyzer warnings by explicitly checking
iface->current_mode in acs_init() for the case where ACS offloading is
not used.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2016-01-07 16:39:10 +02:00 committed by Jouni Malinen
parent 6014e59c08
commit a95cc47a92
1 changed files with 3 additions and 0 deletions
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3
src/ap/acs.c
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@ -933,6 +933,9 @@ enum hostapd_chan_status acs_init(struct hostapd_iface *iface)
return HOSTAPD_CHAN_ACS;
}
if (!iface->current_mode)
return HOSTAPD_CHAN_INVALID;
acs_cleanup(iface);
err = acs_request_scan(iface);