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author | Johannes Berg <johannes.berg@intel.com> | 2022-06-01 09:19:36 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-09 10:23:18 +0200 |
commit | b79110f2bf6022e60e590d2e094728a8eec3e79e (patch) | |
tree | 839466fd499ad9aaf710dd511b9a49b68650f190 /drivers/net/wireless/intel/iwlwifi | |
parent | 4a6ca6f8a3a0600fda8bc26f7aff89369610cb05 (diff) |
wifi: mac80211: fix use-after-free in chanctx code
commit 2965c4cdf7ad9ce0796fac5e57debb9519ea721e upstream.
In ieee80211_vif_use_reserved_context(), when we have an
old context and the new context's replace_state is set to
IEEE80211_CHANCTX_REPLACE_NONE, we free the old context
in ieee80211_vif_use_reserved_reassign(). Therefore, we
cannot check the old_ctx anymore, so we should set it to
NULL after this point.
However, since the new_ctx replace state is clearly not
IEEE80211_CHANCTX_REPLACES_OTHER, we're not going to do
anything else in this function and can just return to
avoid accessing the freed old_ctx.
Cc: stable@vger.kernel.org
Fixes: 5bcae31d9cb1 ("mac80211: implement multi-vif in-place reservations")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220601091926.df419d91b165.I17a9b3894ff0b8323ce2afdb153b101124c821e5@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi')
0 files changed, 0 insertions, 0 deletions