ioctl$PERF_EVENT_IOC_PERIOD(r4, 0x40082404, &(0x7f0000000000))
mount$9p_fd(0x0, &(0x7f0000000380)='./file0/../file0\x00', &(0x7f00000000c0), 0x0, &(0x7f0000000280)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r4}})
BUG: memory leak
unreferenced object 0xffff88801b7d20c0 (size 32):
  comm "syz-executor.3", pid 10641, jiffies 4297020360 (age 21.020s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 31  9p-fcall-cache-1
    32 30 33 00 80 88 ff ff 00 00 00 00 00 00 00 00  203.............
  backtrace:
    [<00000000954eea1e>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000007e9695b0>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000fdd9d3de>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000cfb62c5c>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<000000002a65725a>] kobject_add_varg lib/kobject.c:392 [inline]
    [<000000002a65725a>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000a0c26e11>] sysfs_slab_add+0x172/0x200 mm/slub.c:5631
    [<000000007d77167b>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4450
    [<0000000005e91a2a>] create_cache mm/slab_common.c:255 [inline]
    [<0000000005e91a2a>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000d857839b>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000c9b6a22d>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<0000000030ac3a82>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<000000009d2a0d2d>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<000000004ebb67d9>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<000000004f160466>] do_new_mount fs/namespace.c:2997 [inline]
    [<000000004f160466>] path_mount+0x1490/0x21e0 fs/namespace.c:3327
    [<000000008544a0d6>] do_mount fs/namespace.c:3340 [inline]
    [<000000008544a0d6>] __do_sys_mount fs/namespace.c:3548 [inline]
    [<000000008544a0d6>] __se_sys_mount fs/namespace.c:3525 [inline]
    [<000000008544a0d6>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3525
    [<0000000070e61b9c>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed