CVE-2025-21912

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> gpio: rcar: Use raw_spinlock to protect register access<br /> <br /> Use raw_spinlock in order to fix spurious messages about invalid context<br /> when spinlock debugging is enabled. The lock is only used to serialize<br /> register access.<br /> <br /> [ 4.239592] =============================<br /> [ 4.239595] [ BUG: Invalid wait context ]<br /> [ 4.239599] 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35 Not tainted<br /> [ 4.239603] -----------------------------<br /> [ 4.239606] kworker/u8:5/76 is trying to lock:<br /> [ 4.239609] ffff0000091898a0 (&amp;p-&gt;lock){....}-{3:3}, at: gpio_rcar_config_interrupt_input_mode+0x34/0x164<br /> [ 4.239641] other info that might help us debug this:<br /> [ 4.239643] context-{5:5}<br /> [ 4.239646] 5 locks held by kworker/u8:5/76:<br /> [ 4.239651] #0: ffff0000080fb148 ((wq_completion)async){+.+.}-{0:0}, at: process_one_work+0x190/0x62c<br /> [ 4.250180] OF: /soc/sound@ec500000/ports/port@0/endpoint: Read of boolean property &amp;#39;frame-master&amp;#39; with a value.<br /> [ 4.254094] #1: ffff80008299bd80 ((work_completion)(&amp;entry-&gt;work)){+.+.}-{0:0}, at: process_one_work+0x1b8/0x62c<br /> [ 4.254109] #2: ffff00000920c8f8<br /> [ 4.258345] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property &amp;#39;bitclock-master&amp;#39; with a value.<br /> [ 4.264803] (&amp;dev-&gt;mutex){....}-{4:4}, at: __device_attach_async_helper+0x3c/0xdc<br /> [ 4.264820] #3: ffff00000a50ca40 (request_class#2){+.+.}-{4:4}, at: __setup_irq+0xa0/0x690<br /> [ 4.264840] #4:<br /> [ 4.268872] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property &amp;#39;frame-master&amp;#39; with a value.<br /> [ 4.273275] ffff00000a50c8c8 (lock_class){....}-{2:2}, at: __setup_irq+0xc4/0x690<br /> [ 4.296130] renesas_sdhi_internal_dmac ee100000.mmc: mmc1 base at 0x00000000ee100000, max clock rate 200 MHz<br /> [ 4.304082] stack backtrace:<br /> [ 4.304086] CPU: 1 UID: 0 PID: 76 Comm: kworker/u8:5 Not tainted 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35<br /> [ 4.304092] Hardware name: Renesas Salvator-X 2nd version board based on r8a77965 (DT)<br /> [ 4.304097] Workqueue: async async_run_entry_fn<br /> [ 4.304106] Call trace:<br /> [ 4.304110] show_stack+0x14/0x20 (C)<br /> [ 4.304122] dump_stack_lvl+0x6c/0x90<br /> [ 4.304131] dump_stack+0x14/0x1c<br /> [ 4.304138] __lock_acquire+0xdfc/0x1584<br /> [ 4.426274] lock_acquire+0x1c4/0x33c<br /> [ 4.429942] _raw_spin_lock_irqsave+0x5c/0x80<br /> [ 4.434307] gpio_rcar_config_interrupt_input_mode+0x34/0x164<br /> [ 4.440061] gpio_rcar_irq_set_type+0xd4/0xd8<br /> [ 4.444422] __irq_set_trigger+0x5c/0x178<br /> [ 4.448435] __setup_irq+0x2e4/0x690<br /> [ 4.452012] request_threaded_irq+0xc4/0x190<br /> [ 4.456285] devm_request_threaded_irq+0x7c/0xf4<br /> [ 4.459398] ata1: link resume succeeded after 1 retries<br /> [ 4.460902] mmc_gpiod_request_cd_irq+0x68/0xe0<br /> [ 4.470660] mmc_start_host+0x50/0xac<br /> [ 4.474327] mmc_add_host+0x80/0xe4<br /> [ 4.477817] tmio_mmc_host_probe+0x2b0/0x440<br /> [ 4.482094] renesas_sdhi_probe+0x488/0x6f4<br /> [ 4.486281] renesas_sdhi_internal_dmac_probe+0x60/0x78<br /> [ 4.491509] platform_probe+0x64/0xd8<br /> [ 4.495178] really_probe+0xb8/0x2a8<br /> [ 4.498756] __driver_probe_device+0x74/0x118<br /> [ 4.503116] driver_probe_device+0x3c/0x154<br /> [ 4.507303] __device_attach_driver+0xd4/0x160<br /> [ 4.511750] bus_for_each_drv+0x84/0xe0<br /> [ 4.515588] __device_attach_async_helper+0xb0/0xdc<br /> [ 4.520470] async_run_entry_fn+0x30/0xd8<br /> [ 4.524481] process_one_work+0x210/0x62c<br /> [ 4.528494] worker_thread+0x1ac/0x340<br /> [ 4.532245] kthread+0x10c/0x110<br /> [ 4.535476] ret_from_fork+0x10/0x20