From 47e4df94d129cbca84de252ff63c4ded08a513e7 Mon Sep 17 00:00:00 2001 From: Michal Kazior <michal.kazior@tieto.com> Date: Mon, 18 Aug 2014 13:19:09 +0200 Subject: [PATCH] mac80211: fix channel switch for chanctx-based drivers The new_ctx pointer is set only for non-chanctx drivers. This yielded a crash for chanctx-based drivers during channel switch finalization: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 IP: ieee80211_vif_use_reserved_switch+0x71c/0xb00 [mac80211] Use an adequate chanctx pointer to fix this. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- net/mac80211/chan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 6d537f03c0baa..0375009ddc0db 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -1444,7 +1444,7 @@ ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) list_del(&sdata->reserved_chanctx_list); list_move(&sdata->assigned_chanctx_list, - &new_ctx->assigned_vifs); + &ctx->assigned_vifs); sdata->reserved_chanctx = NULL; ieee80211_vif_chanctx_reservation_complete(sdata); -- GitLab