tty_ioctl+0x12a0/0x17b0 drivers/tty/tty_io.c:2780
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x222/0x400 fs/ioctl.c:856
 __x64_sys_ioctl+0x92/0xd0 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd09028b5f9
=====================================================
BUG: KMSAN: uninit-value in show_opcodes+0x2c1/0x2e0 arch/x86/kernel/dumpstack.c:123
 show_opcodes+0x2c1/0x2e0 arch/x86/kernel/dumpstack.c:123
 show_ip arch/x86/kernel/dumpstack.c:144 [inline]
 show_iret_regs+0xe3/0x230 arch/x86/kernel/dumpstack.c:149
 __show_regs+0x31/0xc90 arch/x86/kernel/process_64.c:74
 show_regs_if_on_stack+0x45e/0x530 arch/x86/kernel/dumpstack.c:167
 show_trace_log_lvl+0x392/0x490 arch/x86/kernel/dumpstack.c:298
 show_stack+0x55/0x60 arch/x86/kernel/dumpstack.c:318
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1c8/0x256 lib/dump_stack.c:106
 dump_stack+0x1a/0x23 lib/dump_stack.c:113
 sysfs_warn_dup fs/sysfs/dir.c:30 [inline]
 sysfs_create_dir_ns+0x475/0x4e0 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:63 [inline]
 kobject_add_internal+0xe89/0x1770 lib/kobject.c:223
 kobject_add_varg lib/kobject.c:358 [inline]
 kobject_add+0x297/0x3d0 lib/kobject.c:410
 device_add+0x9ef/0x26c0 drivers/base/core.c:3452
 device_register+0x32/0x40 drivers/base/core.c:3598
 tty_register_device_attr+0x773/0xf30 drivers/tty/tty_io.c:3245
 tty_register_device+0x3f/0x50 drivers/tty/tty_io.c:3180
 gsm_register_devices drivers/tty/n_gsm.c:544 [inline]
 gsm_activate_mux+0x27c/0x580 drivers/tty/n_gsm.c:2543
 gsm_config drivers/tty/n_gsm.c:2776 [inline]
 gsmld_ioctl+0x1a3b/0x1c50 drivers/tty/n_gsm.c:3113
 tty_ioctl+0x12a0/0x17b0 drivers/tty/tty_io.c:2780
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x222/0x400 fs/ioctl.c:856
 __x64_sys_ioctl+0x92/0xd0 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Local variable opcodes created at:
 show_opcodes+0x49/0x2e0 arch/x86/kernel/dumpstack.c:118
 show_ip arch/x86/kernel/dumpstack.c:144 [inline]
 show_iret_regs+0xe3/0x230 arch/x86/kernel/dumpstack.c:149

CPU: 0 PID: 23011 Comm: syz-executor.2 Not tainted 6.1.0-rc2-syzkaller-61955-g4a3e741a3d6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
=====================================================