diff options
| author |   Johannes Berg <johannes.berg@intel.com> | 2024-01-23 20:08:11 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2024-01-26 10:42:57 +0100 |
| commit | 353d321f63f7dbfc9ef58498cc732c9fe886a596 (patch) | |
| tree | 2bbf13c1ad3cc636aca9af88d42dec5508b01ff9 /drivers/net/wireless/intel/iwlwifi/iwl-drv.c | |
| parent | MAINTAINERS: remove myself as iwlwifi driver maintainer (diff) | |
| download | linux-353d321f63f7dbfc9ef58498cc732c9fe886a596.tar.xz linux-353d321f63f7dbfc9ef58498cc732c9fe886a596.zip | |
wifi: iwlwifi: fix double-free bug
The storage for the TLV PC register data wasn't done like all
the other storage in the drv->fw area, which is cleared at the
end of deallocation. Therefore, the freeing must also be done
differently, explicitly NULL'ing it out after the free, since
otherwise there's a nasty double-free bug here if a file fails
to load after this has been parsed, and we get another free
later (e.g. because no other file exists.) Fix that by adding
the missing NULL assignment.
Cc: stable@vger.kernel.org
Fixes: 5e31b3df86ec ("wifi: iwlwifi: dbg: print pc register data once fw dump occurred")
Reported-by: Guy Kaplan <guy.kaplan@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240123200528.675f3c24ec0d.I6ab4015cd78d82dd95471f840629972ef0331de3@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/iwl-drv.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-drv.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c index ffe2670720c9..abf8001bdac1 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c @@ -128,6 +128,7 @@ static void iwl_dealloc_ucode(struct iwl_drv *drv) kfree(drv->fw.ucode_capa.cmd_versions); kfree(drv->fw.phy_integration_ver); kfree(drv->trans->dbg.pc_data); + drv->trans->dbg.pc_data = NULL; for (i = 0; i < IWL_UCODE_TYPE_MAX; i++) iwl_free_fw_img(drv, drv->fw.img + i); |