Internal error: synchronous external abort: 97140050 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 21580 Comm: syz-executor.0 Not tainted 5.11.0-rc5-syzkaller-00040-g76c057c84d28 #0
Hardware name: linux,dummy-virt (DT)
pstate: 80400089 (Nzcv daIf +PAN -UAO -TCO BTYPE=--)
pc : __raw_writeb arch/arm64/include/asm/io.h:27 [inline]
pc : _outb include/asm-generic/io.h:501 [inline]
pc : logic_outb+0x40/0xb0 lib/logic_pio.c:299
lr : io_serial_out+0x2c/0x40 drivers/tty/serial/8250/8250_port.c:453
sp : ffff80001767bbd0
x29: ffff80001767bbd0 x28: f1ff000004267000 
x27: ffff800014281000 x26: 0000000000000001 
x25: ffff8000142832a0 x24: ffff800014281000 
x23: ffff800014281000 x22: 0000000000000fff 
x21: 0000000000000001 x20: 0000000000000002 
x19: fffffbfffe800001 x18: 00000000fffffffb 
x17: 0000000000000000 x16: 0000000000000000 
x15: 0000000000000020 x14: ffffffffffffffff 
x13: 0000000000000000 x12: ffff80001767bd9f 
x11: 0000000000000000 x10: 7f7f7f7f7f7f7f7f 
x9 : fefefefefeff3252 x8 : ffff80001767b924 
x7 : 0000000000000003 x6 : 0000000000000001 
x5 : f1ff000005d7c4e0 x4 : 0000000000000000 
x3 : ffff800013c02808 x2 : 0000000000000000 
x1 : fffffbfffe800000 x0 : 0000000000ffbffe 
Call trace:
 _outb include/asm-generic/io.h:501 [inline]
 logic_outb+0x40/0xb0 lib/logic_pio.c:299
 io_serial_out+0x2c/0x40 drivers/tty/serial/8250/8250_port.c:453
 serial_out drivers/tty/serial/8250/8250.h:118 [inline]
 serial8250_set_THRI drivers/tty/serial/8250/8250.h:138 [inline]
 __start_tx drivers/tty/serial/8250/8250_port.c:1566 [inline]
 serial8250_start_tx+0x98/0x1c4 drivers/tty/serial/8250/8250_port.c:1666
 __uart_start.isra.0+0x3c/0x4c drivers/tty/serial/serial_core.c:127
 uart_start+0x70/0x110 drivers/tty/serial/serial_core.c:137
 uart_flush_chars+0x14/0x20 drivers/tty/serial/serial_core.c:573
 __receive_buf drivers/tty/n_tty.c:1651 [inline]
 n_tty_receive_buf_common+0x2a0/0xb30 drivers/tty/n_tty.c:1744
 n_tty_receive_buf+0x18/0x2c drivers/tty/n_tty.c:1773
 tiocsti drivers/tty/tty_io.c:2203 [inline]
 tty_ioctl+0x5b8/0xe5c drivers/tty/tty_io.c:2577
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __arm64_sys_ioctl+0xac/0xf0 fs/ioctl.c:739
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:49 [inline]
 el0_svc_common.constprop.0+0x74/0x190 arch/arm64/kernel/syscall.c:159
 do_el0_svc+0x78/0x90 arch/arm64/kernel/syscall.c:198
 el0_svc+0x14/0x20 arch/arm64/kernel/entry-common.c:365
 el0_sync_handler+0x1a8/0x1b0 arch/arm64/kernel/entry-common.c:381
 el0_sync+0x190/0x1c0 arch/arm64/kernel/entry.S:699
Code: d2bfd001 f2df7fe1 f2ffffe1 8b010273 (39000274) 
---[ end trace 00ba385f910422db ]---