BUG: memory leak unreferenced object 0xffff88811aebdd00 (size 32): comm "syz-executor678", pid 6827, jiffies 4294943840 (age 16.040s) hex dump (first 32 bytes): 42 00 32 35 2f 74 61 73 6b 2f 36 38 32 37 00 00 B.25/task/6827.. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000b98ef33a>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<00000000b98ef33a>] slab_post_alloc_hook mm/slab.h:586 [inline] [<00000000b98ef33a>] slab_alloc mm/slab.c:3319 [inline] [<00000000b98ef33a>] __do_kmalloc mm/slab.c:3653 [inline] [<00000000b98ef33a>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3670 [<0000000081e6e0b9>] kstrdup+0x3a/0x70 mm/util.c:60 [<0000000088d94087>] kstrdup_const+0x48/0x60 mm/util.c:82 [<0000000086dbc3af>] kvasprintf_const+0x7e/0xe0 lib/kasprintf.c:48 [<000000009d0390d0>] kobject_set_name_vargs+0x40/0xe0 lib/kobject.c:289 [<00000000de125372>] dev_set_name+0x63/0x90 drivers/base/core.c:2005 [<000000003fa2eb06>] netdev_register_kobject+0x5a/0x1b0 net/core/net-sysfs.c:1727 [<0000000026f3ee8d>] register_netdevice+0x397/0x610 net/core/dev.c:8781 [<000000004e600879>] ip6gre_tunnel_locate+0x240/0x310 net/ipv6/ip6_gre.c:380 [<000000002c74c05f>] ip6gre_tunnel_ioctl+0x1d6/0x450 net/ipv6/ip6_gre.c:1272 [<00000000f89f5c6e>] dev_ifsioc+0x324/0x460 net/core/dev_ioctl.c:322 [<0000000049791fed>] dev_ioctl+0x157/0x470 net/core/dev_ioctl.c:514 [<00000000c63a0f66>] sock_ioctl+0x394/0x480 net/socket.c:1103 [<0000000079972e96>] vfs_ioctl fs/ioctl.c:46 [inline] [<0000000079972e96>] file_ioctl fs/ioctl.c:509 [inline] [<0000000079972e96>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696 [<00000000b5298ad7>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713 [<000000002125bc76>] __do_sys_ioctl fs/ioctl.c:720 [inline] [<000000002125bc76>] __se_sys_ioctl fs/ioctl.c:718 [inline] [<000000002125bc76>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718