wifi: cfg80211: validate monitor channel set against radio usage

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Current logic only looks globally at interface counts to validate that a
monitor can have its channel configured. This works to ensure that the
wiphy is not pulled off the channel currently being used by another
active interface, but fails to allow for the case where the channels in
use on the other active interface and the desired channel for the
monitor fall on disjoint sets of radios.

Instead, search for any interface which would cause conflict, otherwise
allowing for the configuration.

Suggested-by: Dylan Eskew <dylan.eskew@candelatech.com>
Signed-off-by: Rory Little <roryl@candelatech.com>
Link: https://patch.msgid.link/20260921210441.3137-1-roryl@candelatech.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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Rory Little 2026-09-21 14:04:41 -07:00 • committed by Johannes Berg

parent e01f1c70e4

commit 12bc27e79a

1 changed files with 32 additions and 1 deletions

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net/wireless/chan.c

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