BUG: memory leak
unreferenced object 0xffff88810e1c3d80 (size 128):
  comm "syz-executor.2", pid 7338, jiffies 4294951388 (age 9.290s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000042d229a7>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<0000000042d229a7>] slab_post_alloc_hook mm/slab.h:522 [inline]
    [<0000000042d229a7>] slab_alloc mm/slab.c:3319 [inline]
    [<0000000042d229a7>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<00000000439ddea3>] kmalloc include/linux/slab.h:552 [inline]
    [<00000000439ddea3>] kzalloc include/linux/slab.h:748 [inline]
    [<00000000439ddea3>] cfserl_create+0x24/0x76 net/caif/cfserl.c:36
    [<000000001c88f004>] caif_device_notify+0x347/0x3bc net/caif/caif_dev.c:388
    [<000000008a126c41>] notifier_call_chain+0x66/0xb0 kernel/notifier.c:95
    [<000000005096e784>] __raw_notifier_call_chain kernel/notifier.c:396 [inline]
    [<000000005096e784>] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403
    [<00000000a627d14f>] call_netdevice_notifiers_info+0x33/0x70 net/core/dev.c:1749
    [<0000000035f5f854>] call_netdevice_notifiers_extack net/core/dev.c:1761 [inline]
    [<0000000035f5f854>] call_netdevice_notifiers net/core/dev.c:1775 [inline]
    [<0000000035f5f854>] register_netdevice+0x445/0x600 net/core/dev.c:8752
    [<0000000097d1f732>] ldisc_open+0x1f7/0x350 drivers/net/caif/caif_serial.c:359
    [<000000001135fd5c>] tty_ldisc_open.isra.0+0x44/0x70 drivers/tty/tty_ldisc.c:469
    [<00000000fa3657d4>] tty_set_ldisc+0x149/0x240 drivers/tty/tty_ldisc.c:596
    [<00000000b2cc2017>] tiocsetd drivers/tty/tty_io.c:2334 [inline]
    [<00000000b2cc2017>] tty_ioctl+0x366/0xa30 drivers/tty/tty_io.c:2594
    [<0000000061661701>] vfs_ioctl fs/ioctl.c:46 [inline]
    [<0000000061661701>] file_ioctl fs/ioctl.c:509 [inline]
    [<0000000061661701>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
    [<0000000050f22ece>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
    [<00000000a42a8397>] __do_sys_ioctl fs/ioctl.c:720 [inline]
    [<00000000a42a8397>] __se_sys_ioctl fs/ioctl.c:718 [inline]
    [<00000000a42a8397>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
    [<0000000037a1ec47>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296
    [<00000000625ce582>] entry_SYSCALL_64_after_hwframe+0x44/0xa9