CVE-2022-50076

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