ffffffffda RBX: 0000000000000000 RCX: 0000000000441429
BUG: memory leak
unreferenced object 0xffff888113d704e0 (size 32):
  comm "syz-executor259", pid 6931, jiffies 4294949688 (age 7.990s)
  hex dump (first 32 bytes):
    70 70 70 30 00 70 70 70 00 00 00 00 00 00 00 00  ppp0.ppp........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000003896dfa2>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000003896dfa2>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000003896dfa2>] slab_alloc mm/slab.c:3326 [inline]
    [<000000003896dfa2>] __do_kmalloc mm/slab.c:3658 [inline]
    [<000000003896dfa2>] __kmalloc_track_caller+0x15d/0x2c0 mm/slab.c:3675
    [<0000000046bcc393>] kstrdup+0x3a/0x70 mm/util.c:52
    [<00000000d5a8f49c>] kstrdup_const+0x48/0x60 mm/util.c:74
    [<00000000034207e9>] kvasprintf_const+0x7e/0xe0 lib/kasprintf.c:48
    [<00000000dbf11b87>] kobject_set_name_vargs+0x40/0xe0 lib/kobject.c:289
    [<0000000060ae1b2a>] dev_set_name+0x63/0x90 drivers/base/core.c:1915
    [<00000000454452b8>] netdev_register_kobject+0x5a/0x1b0 net/core/net-sysfs.c:1727
    [<000000008f0f7556>] register_netdevice+0x397/0x600 net/core/dev.c:8705
    [<00000000cc6399a1>] ppp_unit_register drivers/net/ppp/ppp_generic.c:989 [inline]
    [<00000000cc6399a1>] ppp_dev_configure+0x2a8/0x380 drivers/net/ppp/ppp_generic.c:1045
    [<00000000e3064e61>] ppp_create_interface drivers/net/ppp/ppp_generic.c:3057 [inline]
    [<00000000e3064e61>] ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:844 [inline]
    [<00000000e3064e61>] ppp_ioctl+0x977/0xdd0 drivers/net/ppp/ppp_generic.c:597
    [<000000003c396fe8>] vfs_ioctl fs/ioctl.c:46 [inline]
    [<000000003c396fe8>] file_ioctl fs/ioctl.c:509 [inline]
    [<000000003c396fe8>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
    [<00000000b30c0aeb>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
    [<00000000b885d7b1>] __do_sys_ioctl fs/ioctl.c:720 [inline]
    [<00000000b885d7b1>] __se_sys_ioctl fs/ioctl.c:718 [inline]
    [<00000000b885d7b1>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
    [<00000000615e4e88>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<000000007cadad19>] entry_SYSCALL_64_after_hwframe+0x44/0xa9