CVE-2022-50076

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak on the deferred close xfstests on smb21 report kmemleak as below: unreferenced object 0xffff8881767d6200 (size 64): comm "xfs_io", pid 1284, jiffies 4294777434 (age 20.789s) hex dump (first 32 bytes): 80 5a d0 11 81 88 ff ff 78 8a aa 63 81 88 ff ff .Z......x..c.... 00 71 99 76 81 88 ff ff 00 00 00 00 00 00 00 00 .q.v............ backtrace: [ ] cifs_close+0x92/0x2c0 [ ] __fput+0xff/0x3f0 [ ] task_work_run+0x85/0xc0 [ ] do_exit+0x5e5/0x1240 [ ] do_group_exit+0x58/0xe0 [ ] __x64_sys_exit_group+0x28/0x30 [ ] do_syscall_64+0x35/0x80 [ ] entry_SYSCALL_64_after_hwframe+0x46/0xb0 When cancel the deferred close work, we should also cleanup the struct cifs_deferred_close.