memory leak in tty_init

BUG: memory leak unreferenced object 0xffff88810da76400 (size 1024): comm "syz-executor299", pid 3683, jiffies 4294957001 (age 29.640s) hex dump (first 32 bytes): 01 54 00 00 01 00 00 00 00 00 00 00 00 00 00 00 .T.............. 40 95 0d 04 81 88 ff ff 00 fc c4 84 ff ff ff ff @............... backtrace: [<ffffffff825ee96c>] kmalloc include/linux/slab.h:581 [inline] [<ffffffff825ee96c>] kzalloc include/linux/slab.h:714 [inline] [<ffffffff825ee96c>] alloc_tty_struct+0x3c/0x2f0 drivers/tty/tty_io.c:3091 [<ffffffff825eec40>] tty_init_dev.part.0+0x20/0x2f0 drivers/tty/tty_io.c:1412 [<ffffffff825eef50>] tty_init_dev+0x40/0x60 drivers/tty/tty_io.c:1409 [<ffffffff825fd949>] ptmx_open drivers/tty/pty.c:834 [inline] [<ffffffff825fd949>] ptmx_open+0xd9/0x210 drivers/tty/pty.c:800 [<ffffffff815c628d>] chrdev_open+0x10d/0x340 fs/char_dev.c:414 [<ffffffff815b4c46>] do_dentry_open+0x1e6/0x650 fs/open.c:824 [<ffffffff815db101>] do_open fs/namei.c:3476 [inline] [<ffffffff815db101>] path_openat+0x18a1/0x1e70 fs/namei.c:3609 [<ffffffff815dddd1>] do_filp_open+0xc1/0x1b0 fs/namei.c:3636 [<ffffffff815b841d>] do_sys_openat2+0xed/0x260 fs/open.c:1213 [<ffffffff815b8e6f>] do_sys_open fs/open.c:1229 [inline] [<ffffffff815b8e6f>] __do_sys_openat fs/open.c:1245 [inline] [<ffffffff815b8e6f>] __se_sys_openat fs/open.c:1240 [inline] [<ffffffff815b8e6f>] __x64_sys_openat+0x7f/0xe0 fs/open.c:1240 [<ffffffff84565f05>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84565f05>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff888109c1ce00 (size 512): comm "syz-executor299", pid 3683, jiffies 4294957001 (age 29.640s) hex dump (first 32 bytes): 50 ce c1 09 81 88 ff ff e0 ff ff ff 0f 00 00 00 P............... 10 ce c1 09 81 88 ff ff 10 ce c1 09 81 88 ff ff ................ backtrace: [<ffffffff825fdb42>] kmalloc include/linux/slab.h:581 [inline] [<ffffffff825fdb42>] pty_common_install+0x72/0x3d0 drivers/tty/pty.c:382 [<ffffffff825eec7b>] tty_driver_install_tty drivers/tty/tty_io.c:1307 [inline] [<ffffffff825eec7b>] tty_init_dev.part.0+0x5b/0x2f0 drivers/tty/tty_io.c:1419 [<ffffffff825eef50>] tty_init_dev+0x40/0x60 drivers/tty/tty_io.c:1409 [<ffffffff825fd949>] ptmx_open drivers/tty/pty.c:834 [inline] [<ffffffff825fd949>] ptmx_open+0xd9/0x210 drivers/tty/pty.c:800 [<ffffffff815c628d>] chrdev_open+0x10d/0x340 fs/char_dev.c:414 [<ffffffff815b4c46>] do_dentry_open+0x1e6/0x650 fs/open.c:824 [<ffffffff815db101>] do_open fs/namei.c:3476 [inline] [<ffffffff815db101>] path_openat+0x18a1/0x1e70 fs/namei.c:3609 [<ffffffff815dddd1>] do_filp_open+0xc1/0x1b0 fs/namei.c:3636 [<ffffffff815b841d>] do_sys_openat2+0xed/0x260 fs/open.c:1213 [<ffffffff815b8e6f>] do_sys_open fs/open.c:1229 [inline] [<ffffffff815b8e6f>] __do_sys_openat fs/open.c:1245 [inline] [<ffffffff815b8e6f>] __se_sys_openat fs/open.c:1240 [inline] [<ffffffff815b8e6f>] __x64_sys_openat+0x7f/0xe0 fs/open.c:1240 [<ffffffff84565f05>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84565f05>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae