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wifi: mac80211: disable softirqs for queued frame handling

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commit 321028bc45 upstream.

As noticed by syzbot, calling ieee80211_handle_queued_frames()
(and actually handling frames there) requires softirqs to be
disabled, since we call into the RX code. Fix that in the case
of cleaning up frames left over during shutdown.

Fixes: 177c6ae972 ("wifi: mac80211: handle tasklet frames before stopping")
Reported-by: syzbot+1d516edf1e74469ba5d3@syzkaller.appspotmail.com
Link: https://patch.msgid.link/20240626091559.cd6f08105a6e.I74778610a5ff2cf8680964698131099d2960352a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Berg 2024-06-26 09:15:59 +02:00 committed by Greg Kroah-Hartman
parent 7b0579711a
commit 396dc11319
2 changed files with 3 additions and 0 deletions
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1
net/mac80211/main.c
View File

@ -423,6 +423,7 @@ u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
BSS_CHANGED_ERP_SLOT;
}
/* context: requires softirqs disabled */
void ieee80211_handle_queued_frames(struct ieee80211_local *local)
{
struct sk_buff *skb;

2
net/mac80211/util.c
View File

@ -1567,7 +1567,9 @@ u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
void ieee80211_stop_device(struct ieee80211_local *local)
{
local_bh_disable();
ieee80211_handle_queued_frames(local);
local_bh_enable();
ieee80211_led_radio(local, false);
ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);