Don't see any problems with this - but would like to run some more tests on it
On Thu, Aug 18, 2022 at 8:24 PM zhangxiaoxu (A) <zhangxiaoxu5@xxxxxxxxxx> wrote:
>
> running generic/029 and scan kmemleak on backend report this issue.
>
> 在 2022/8/19 0:28, Steve French 写道:
> > looks promising - am reviewing this now. Which xfstest did you see
> > this when runnign?
> >
> > On Thu, Aug 18, 2022 at 8:01 AM Zhang Xiaoxu <zhangxiaoxu5@xxxxxxxxxx> wrote:
> >>
> >> 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:
> >> [<00000000ad04e6ea>] cifs_close+0x92/0x2c0
> >> [<0000000028b93c82>] __fput+0xff/0x3f0
> >> [<00000000d8116851>] task_work_run+0x85/0xc0
> >> [<0000000027e14f9e>] do_exit+0x5e5/0x1240
> >> [<00000000fb492b95>] do_group_exit+0x58/0xe0
> >> [<00000000129a32d9>] __x64_sys_exit_group+0x28/0x30
> >> [<00000000e3f7d8e9>] do_syscall_64+0x35/0x80
> >> [<00000000102e8a0b>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
> >>
> >> When cancel the deferred close work, we should also cleanup the struct
> >> cifs_deferred_close.
> >>
> >> Fixes: 9e992755be8f2 ("cifs: Call close synchronously during unlink/rename/lease break.")
> >> Fixes: e3fc065682ebb ("cifs: Deferred close performance improvements")
> >> Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@xxxxxxxxxx>
> >> ---
> >> fs/cifs/misc.c | 6 ++++++
> >> 1 file changed, 6 insertions(+)
> >>
> >> diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
> >> index 1f2628ffe9d7..87f60f736731 100644
> >> --- a/fs/cifs/misc.c
> >> +++ b/fs/cifs/misc.c
> >> @@ -737,6 +737,8 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
> >> list_for_each_entry(cfile, &cifs_inode->openFileList, flist) {
> >> if (delayed_work_pending(&cfile->deferred)) {
> >> if (cancel_delayed_work(&cfile->deferred)) {
> >> + cifs_del_deferred_close(cfile);
> >> +
> >> tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
> >> if (tmp_list == NULL)
> >> break;
> >> @@ -766,6 +768,8 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon)
> >> list_for_each_entry(cfile, &tcon->openFileList, tlist) {
> >> if (delayed_work_pending(&cfile->deferred)) {
> >> if (cancel_delayed_work(&cfile->deferred)) {
> >> + cifs_del_deferred_close(cfile);
> >> +
> >> tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
> >> if (tmp_list == NULL)
> >> break;
> >> @@ -799,6 +803,8 @@ cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
> >> if (strstr(full_path, path)) {
> >> if (delayed_work_pending(&cfile->deferred)) {
> >> if (cancel_delayed_work(&cfile->deferred)) {
> >> + cifs_del_deferred_close(cfile);
> >> +
> >> tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
> >> if (tmp_list == NULL)
> >> break;
> >> --
> >> 2.31.1
> >>
> >
> >
--
Thanks,
Steve
