Hello, syzbot found the following issue on: HEAD commit: 76c057c8 Merge branch 'parisc-5.11-2' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13728c5f500000 kernel config: https://syzkaller.appspot.com/x/.config?x=f75d66d6d359ef2f dashboard link: https://syzkaller.appspot.com/bug?extid=51bed6fc20ecc6362058 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+51bed6fc20ecc6362058@xxxxxxxxxxxxxxxxxxxxxxxxx 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 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
