{"id":"AZL-56550","summary":"CVE-2025-21684 affecting package kernel for versions less than 6.6.76.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: xilinx: Convert gpio_lock to raw spinlock\n\nirq_chip functions may be called in raw spinlock context. Therefore, we\nmust also use a raw spinlock for our own internal locking.\n\nThis fixes the following lockdep splat:\n\n[    5.349336] =============================\n[    5.353349] [ BUG: Invalid wait context ]\n[    5.357361] 6.13.0-rc5+ #69 Tainted: G        W\n[    5.363031] -----------------------------\n[    5.367045] kworker/u17:1/44 is trying to lock:\n[    5.371587] ffffff88018b02c0 (&chip-\u003egpio_lock){....}-{3:3}, at: xgpio_irq_unmask (drivers/gpio/gpio-xilinx.c:433 (discriminator 8))\n[    5.380079] other info that might help us debug this:\n[    5.385138] context-{5:5}\n[    5.387762] 5 locks held by kworker/u17:1/44:\n[    5.392123] #0: ffffff8800014958 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3204)\n[    5.402260] #1: ffffffc082fcbdd8 (deferred_probe_work){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3205)\n[    5.411528] #2: ffffff880172c900 (&dev-\u003emutex){....}-{4:4}, at: __device_attach (drivers/base/dd.c:1006)\n[    5.419929] #3: ffffff88039c8268 (request_class#2){+.+.}-{4:4}, at: __setup_irq (kernel/irq/internals.h:156 kernel/irq/manage.c:1596)\n[    5.428331] #4: ffffff88039c80c8 (lock_class#2){....}-{2:2}, at: __setup_irq (kernel/irq/manage.c:1614)\n[    5.436472] stack backtrace:\n[    5.439359] CPU: 2 UID: 0 PID: 44 Comm: kworker/u17:1 Tainted: G        W          6.13.0-rc5+ #69\n[    5.448690] Tainted: [W]=WARN\n[    5.451656] Hardware name: xlnx,zynqmp (DT)\n[    5.455845] Workqueue: events_unbound deferred_probe_work_func\n[    5.461699] Call trace:\n[    5.464147] show_stack+0x18/0x24 C\n[    5.467821] dump_stack_lvl (lib/dump_stack.c:123)\n[    5.471501] dump_stack (lib/dump_stack.c:130)\n[    5.474824] __lock_acquire (kernel/locking/lockdep.c:4828 kernel/locking/lockdep.c:4898 kernel/locking/lockdep.c:5176)\n[    5.478758] lock_acquire (arch/arm64/include/asm/percpu.h:40 kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851 kernel/locking/lockdep.c:5814)\n[    5.482429] _raw_spin_lock_irqsave (include/linux/spinlock_api_smp.h:111 kernel/locking/spinlock.c:162)\n[    5.486797] xgpio_irq_unmask (drivers/gpio/gpio-xilinx.c:433 (discriminator 8))\n[    5.490737] irq_enable (kernel/irq/internals.h:236 kernel/irq/chip.c:170 kernel/irq/chip.c:439 kernel/irq/chip.c:432 kernel/irq/chip.c:345)\n[    5.494060] __irq_startup (kernel/irq/internals.h:241 kernel/irq/chip.c:180 kernel/irq/chip.c:250)\n[    5.497645] irq_startup (kernel/irq/chip.c:270)\n[    5.501143] __setup_irq (kernel/irq/manage.c:1807)\n[    5.504728] request_threaded_irq (kernel/irq/manage.c:2208)","modified":"2026-04-01T05:18:55.186144Z","published":"2025-02-09T12:15:29Z","upstream":["CVE-2025-21684"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21684"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.76.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-56550.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}