CPU: 1 PID: 19758 Comm: kworker/1:4 Not tainted 5.18.0-syzkaller-16253-g2f3064574275 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events request_firmware_work_func RIP: 0010:sysfs_remove_group+0x1cc/0x5f0 fs/sysfs/group.c:278 Code: c1 e0 20 48 09 c8 49 89 86 70 09 00 00 49 c7 86 80 0c 00 00 00 00 00 00 48 c7 c7 b2 c4 c5 90 4c 89 e6 4c 89 fa e8 e4 8b a4 fe <0f> 0b e9 db 03 00 00 8b 7d d4 e8 85 c5 91 ff e9 77 fe ff ff 8b 7d RSP: 0018:ffff88808d21b820 EFLAGS: 00010246 ===================================================== BUG: KMSAN: uninit-value in number+0xde7/0x2410 lib/vsprintf.c:495 number+0xde7/0x2410 lib/vsprintf.c:495 vsnprintf+0x1de2/0x3460 lib/vsprintf.c:2872 vprintk_store+0x52e/0x2110 kernel/printk/printk.c:2158 vprintk_emit+0x276/0xa70 kernel/printk/printk.c:2256 vprintk_default+0x8a/0xa0 kernel/printk/printk.c:2283 vprintk+0x163/0x180 kernel/printk/printk_safe.c:50 _printk+0x191/0x1d3 kernel/printk/printk.c:2293 __show_regs+0x285/0x1040 arch/x86/kernel/process_64.c:81 show_regs+0xc0/0x160 arch/x86/kernel/dumpstack.c:463 __warn+0x3c2/0x730 kernel/panic.c:596 report_bug+0x8eb/0xae0 lib/bug.c:199 handle_bug+0x41/0x70 arch/x86/kernel/traps.c:315 exc_invalid_op+0x1b/0x50 arch/x86/kernel/traps.c:335 asm_exc_invalid_op+0x12/0x20 sysfs_remove_group+0x1cc/0x5f0 fs/sysfs/group.c:278 dpm_sysfs_remove+0x148/0x180 drivers/base/power/sysfs.c:837 device_del+0x3c7/0x1c00 drivers/base/core.c:3569 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:550 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:588 [inline] firmware_fallback_sysfs+0x17e9/0x19e0 drivers/base/firmware_loader/fallback.c:664 _request_firmware+0x1493/0x20f0 drivers/base/firmware_loader/main.c:788 request_firmware_work_func+0x13a/0x2f0 drivers/base/firmware_loader/main.c:1037 process_one_work+0xe67/0x1860 kernel/workqueue.c:2289 worker_thread+0x1100/0x21f0 kernel/workqueue.c:2436 kthread+0x3c7/0x500 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Local variable uid created at: internal_create_group+0x87/0x1d40 fs/sysfs/group.c:111 internal_create_groups fs/sysfs/group.c:188 [inline] sysfs_create_groups+0xef/0x2c0 fs/sysfs/group.c:214 CPU: 1 PID: 19758 Comm: kworker/1:4 Not tainted 5.18.0-syzkaller-16253-g2f3064574275 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events request_firmware_work_func =====================================================