Jeff Layton 9c1c2b35f1 ceph: hold extra reference to r_parent over life of request ... Currently, we just assume that it will stick around by virtue of the submitter's reference, but later patches will allow the syscall to return early and we can't rely on that reference at that point. While I'm not aware of any reports of it, Xiubo pointed out that this may fix a use-after-free. If the wait for a reply times out or is canceled via signal, and then the reply comes in after the syscall returns, the client can end up trying to access r_parent without a reference. Take an extra reference to the inode when setting r_parent and release it when releasing the request. Cc: stable@vger.kernel.org Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>		2020-01-21 19:02:37 +01:00
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acl.c
addr.c
cache.c
cache.h
caps.c
ceph_frag.c
debugfs.c
dir.c
export.c
file.c
inode.c
io.c
io.h
ioctl.c
ioctl.h
Kconfig
locks.c
Makefile
mds_client.c
mds_client.h
mdsmap.c
quota.c
snap.c
strings.c
super.c
super.h
xattr.c