===================================================== BUG: KMSAN: uninit-value in variable_test_bit arch/x86/include/asm/bitops.h:214 [inline] BUG: KMSAN: uninit-value in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] BUG: KMSAN: uninit-value in n_tty_receive_buf_standard drivers/tty/n_tty.c:1557 [inline] BUG: KMSAN: uninit-value in __receive_buf drivers/tty/n_tty.c:1577 [inline] BUG: KMSAN: uninit-value in n_tty_receive_buf_common+0x1e6c/0x10360 drivers/tty/n_tty.c:1674 variable_test_bit arch/x86/include/asm/bitops.h:214 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] n_tty_receive_buf_standard drivers/tty/n_tty.c:1557 [inline] __receive_buf drivers/tty/n_tty.c:1577 [inline] n_tty_receive_buf_common+0x1e6c/0x10360 drivers/tty/n_tty.c:1674 n_tty_receive_buf2+0xbe/0xd0 drivers/tty/n_tty.c:1709 tty_ldisc_receive_buf+0x15e/0x390 drivers/tty/tty_buffer.c:471 tty_port_default_receive_buf+0x14b/0x1e0 drivers/tty/tty_port.c:39 receive_buf drivers/tty/tty_buffer.c:491 [inline] flush_to_ldisc+0x3b5/0x940 drivers/tty/tty_buffer.c:543 process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297 worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444 kthread+0x66b/0x780 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Uninit was created at: slab_alloc_node mm/slub.c:3228 [inline] slab_alloc mm/slub.c:3237 [inline] __kmalloc+0x7d5/0x1150 mm/slub.c:4415 kmalloc include/linux/slab.h:596 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:177 [inline] __tty_buffer_request_room+0x4d2/0x900 drivers/tty/tty_buffer.c:275 __tty_insert_flip_char+0xe5/0x3d0 drivers/tty/tty_buffer.c:392 tty_insert_flip_char include/linux/tty_flip.h:36 [inline] uart_insert_char+0x495/0xb70 drivers/tty/serial/serial_core.c:3127 serial8250_read_char+0x280/0x820 drivers/tty/serial/8250/8250_port.c:1769 serial8250_rx_chars drivers/tty/serial/8250/8250_port.c:1784 [inline] serial8250_handle_irq+0x540/0x980 drivers/tty/serial/8250/8250_port.c:1927 serial8250_default_handle_irq+0x18f/0x370 drivers/tty/serial/8250/8250_port.c:1949 serial8250_interrupt+0x112/0x400 drivers/tty/serial/8250/8250_core.c:126 __handle_irq_event_percpu+0x184/0xba0 kernel/irq/handle.c:156 handle_irq_event_percpu kernel/irq/handle.c:196 [inline] handle_irq_event+0x190/0x420 kernel/irq/handle.c:213 handle_edge_irq+0x737/0x13c0 kernel/irq/chip.c:822 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0xaf/0x2c0 arch/x86/kernel/irq.c:250 common_interrupt+0x8a/0xa0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x1e/0x40 =====================================================