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| author | Nguyen Dinh Phi <phind.uet@gmail.com> | 2021-10-27 20:37:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-26 13:40:41 +0300 |
| commit | 4e458abbb4a523f1413bfe15c079cf4e24c15b21 (patch) | |
| tree | ea48c1a07cbb2409ebe18ec4034941490310d406 | |
| parent | b8615eb8dcdf53e42538ef6999b9dbbae951c089 (diff) | |
| download | linux-4e458abbb4a523f1413bfe15c079cf4e24c15b21.tar.xz | |
cfg80211: call cfg80211_stop_ap when switch from P2P_GO type
commit 563fbefed46ae4c1f70cffb8eb54c02df480b2c2 upstream.
If the userspace tools switch from NL80211_IFTYPE_P2P_GO to
NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it
does not call the cleanup cfg80211_stop_ap(), this leads to the
initialization of in-use data. For example, this path re-init the
sdata->assigned_chanctx_list while it is still an element of
assigned_vifs list, and makes that linked list corrupt.
Signed-off-by: Nguyen Dinh Phi <phind.uet@gmail.com>
Reported-by: syzbot+bbf402b783eeb6d908db@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20211027173722.777287-1-phind.uet@gmail.com
Cc: stable@vger.kernel.org
Fixes: ac800140c20e ("cfg80211: .stop_ap when interface is going down")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/wireless/util.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c index bf4dd297a4db..94849702b518 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1026,6 +1026,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev, switch (otype) { case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: cfg80211_stop_ap(rdev, dev, true); break; case NL80211_IFTYPE_ADHOC: |