fuse: revalidate: don't invalidate if interrupted

stable inclusion
from stable-v5.10.188
commit dad97c205af2ac0af419b98c2d6fa267f7ced8dd
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8KYFP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=dad97c205af2ac0af419b98c2d6fa267f7ced8dd



--------------------------------

commit a9d1c4c6 upstream.

If the LOOKUP request triggered from fuse_dentry_revalidate() is
interrupted, then the dentry will be invalidated, possibly resulting in
submounts being unmounted.

Reported-by: Xu Rongbo <xurongbo@baidu.com>
Closes: https://lore.kernel.org/all/CAJfpegswN_CJJ6C3RZiaK6rpFmNyWmXfaEpnQUJ42KCwNF5tWw@mail.gmail.com/


Fixes: 9e6268db ("[PATCH] FUSE - read-write operations")
Cc: <stable@vger.kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>