Lukasz Bartosik <lb@xxxxxxxxxxxx> wrote:
> From: Łukasz Bartosik <lb@xxxxxxxxxxxx>
>
> Fix warnings produced by:
> - lockdep_assert_wiphy() in function reg_process_self_managed_hint(),
> - wiphy_dereference() in function iwl_mvm_init_fw_regd().
> Both function are expected to be called in critical section.
>
> The warnings were discovered when running v5.15 kernel
> with debug options enabled:
>
> 1)
> Hardware name: Google Delbin/Delbin
> RIP: 0010:reg_process_self_managed_hint+0x254/0x347 [cfg80211]
> ...
> Call Trace:
> regulatory_set_wiphy_regd_sync+0x3d/0xb0
> iwl_mvm_init_mcc+0x49d/0x5a2
> iwl_op_mode_mvm_start+0x1b58/0x2507
> ? iwl_mvm_reprobe_wk+0x94/0x94
> _iwl_op_mode_start+0x146/0x1a3
> iwl_opmode_register+0xda/0x13d
> init_module+0x28/0x1000
>
> 2)
> drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:263 suspicious rcu_dereference_protected() usage!
> ...
> Hardware name: Google Delbin/Delbin, BIOS Google_Delbin
> Call Trace:
> dump_stack_lvl+0xb1/0xe6
> iwl_mvm_init_fw_regd+0x2e7/0x379
> iwl_mvm_init_mcc+0x2c6/0x5a2
> iwl_op_mode_mvm_start+0x1b58/0x2507
> ? iwl_mvm_reprobe_wk+0x94/0x94
> _iwl_op_mode_start+0x146/0x1a3
> iwl_opmode_register+0xda/0x13d
> init_module+0x28/0x100
>
> Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver")
> Signed-off-by: Łukasz Bartosik <lb@xxxxxxxxxxxx>
Patch applied to wireless-drivers.git, thanks.
f5cecf1d4c5f iwlwifi: fix warnings produced by kernel debug options
--
https://patchwork.kernel.org/project/linux-wireless/patch/20211110215744.5487-1-lukasz.bartosik@xxxxxxxxxxxx/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
