diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2022-02-08 13:47:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-23 14:03:08 +0300 |
| commit | ddd46059f7d99119b62d44c519df7a79f2e6a515 (patch) | |
| tree | 000071bac5c5cd49a4df2b549f536655d25557f4 /drivers/net/wireless/intel/iwlwifi | |
| parent | 8209fede7d58e2ba777a87523026e5e70f8067f9 (diff) | |
| download | linux-ddd46059f7d99119b62d44c519df7a79f2e6a515.tar.xz | |
iwlwifi: fix use-after-free
commit bea2662e7818e15d7607d17d57912ac984275d94 upstream.
If no firmware was present at all (or, presumably, all of the
firmware files failed to parse), we end up unbinding by calling
device_release_driver(), which calls remove(), which then in
iwlwifi calls iwl_drv_stop(), freeing the 'drv' struct. However
the new code I added will still erroneously access it after it
was freed.
Set 'failure=false' in this case to avoid the access, all data
was already freed anyway.
Cc: stable@vger.kernel.org
Reported-by: Stefan Agner <stefan@agner.ch>
Reported-by: Wolfgang Walter <linux@stwm.de>
Reported-by: Jason Self <jason@bluehome.net>
Reported-by: Dominik Behr <dominik@dominikbehr.com>
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Fixes: ab07506b0454 ("iwlwifi: fix leaks/bad data after failed firmware load")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220208114728.e6b514cf4c85.Iffb575ca2a623d7859b542c33b2a507d01554251@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-drv.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c index b7f7b9c5b670..524b0ad87357 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c @@ -1614,6 +1614,8 @@ static void iwl_req_fw_callback(const struct firmware *ucode_raw, void *context) out_unbind: complete(&drv->request_firmware_complete); device_release_driver(drv->trans->dev); + /* drv has just been freed by the release */ + failure = false; free: if (failure) iwl_dealloc_ucode(drv); |