=====================================================
BUG: KMSAN: uninit-value in lookahead_bufs drivers/tty/tty_buffer.c:486 [inline]
BUG: KMSAN: uninit-value in flush_to_ldisc+0x918/0xd90 drivers/tty/tty_buffer.c:568
 lookahead_bufs drivers/tty/tty_buffer.c:486 [inline]
 flush_to_ldisc+0x918/0xd90 drivers/tty/tty_buffer.c:568
 process_one_work+0xb27/0x13e0 kernel/workqueue.c:2289
 worker_thread+0x1076/0x1d60 kernel/workqueue.c:2436
 kthread+0x31b/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Uninit was created at:
 __alloc_pages+0x9f1/0xe80 mm/page_alloc.c:5578
 alloc_pages+0xaae/0xd80 mm/mempolicy.c:2285
 alloc_slab_page mm/slub.c:1794 [inline]
 allocate_slab+0x1b5/0x1010 mm/slub.c:1939
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0x10c3/0x2d60 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x7fe/0xc90 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc+0x11d/0x3c0 mm/slab_common.c:968
 kmalloc include/linux/slab.h:581 [inline]
 tty_buffer_alloc drivers/tty/tty_buffer.c:180 [inline]
 __tty_buffer_request_room+0x3b9/0x670 drivers/tty/tty_buffer.c:278
 __tty_insert_flip_char+0x5e/0x2f0 drivers/tty/tty_buffer.c:398
 tty_insert_flip_char include/linux/tty_flip.h:35 [inline]
 uart_insert_char+0x385/0x960 drivers/tty/serial/serial_core.c:3337
 serial8250_read_char+0x19f/0x5d0 drivers/tty/serial/8250/8250_port.c:1783
 serial8250_rx_chars drivers/tty/serial/8250/8250_port.c:1800 [inline]
 serial8250_handle_irq+0x483/0x850 drivers/tty/serial/8250/8250_port.c:1941
 serial8250_default_handle_irq+0x116/0x2a0 drivers/tty/serial/8250/8250_port.c:1966
 serial8250_interrupt+0xbc/0x350 drivers/tty/serial/8250/8250_core.c:126
 __handle_irq_event_percpu+0x11c/0xb40 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
 handle_irq_event+0xeb/0x2b0 kernel/irq/handle.c:210
 handle_edge_irq+0x355/0xfa0 kernel/irq/chip.c:819
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq arch/x86/kernel/irq.c:231 [inline]
 __common_interrupt+0x94/0x250 arch/x86/kernel/irq.c:250
 common_interrupt+0xaf/0xd0 arch/x86/kernel/irq.c:240
 asm_common_interrupt+0x27/0x40 arch/x86/include/asm/idtentry.h:640

CPU: 0 PID: 40 Comm: kworker/u4:2 Not tainted 6.1.0-rc4-syzkaller-62821-gcb231e2f67ec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound flush_to_ldisc
=====================================================