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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-09 20:53:58 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-09 20:53:58 +0300 |
| commit | 7e8c948b3f09b19e3883517e10a3d5ffa9899f84 (patch) | |
| tree | 48c7f16ba523aa6934c61a6c431733e5705ccd5d /fs | |
| parent | 0f506c7f7d3d8d68a1a020c3d914390b3ffc30d0 (diff) | |
| parent | 409e873ea3c1fd3079909718bbeb06ac1ec7f38b (diff) | |
| download | linux-7e8c948b3f09b19e3883517e10a3d5ffa9899f84.tar.xz | |
Merge tag 'ceph-for-6.4-rc6' of https://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"A fix for a potential data corruption in differential backup and
snapshot-based mirroring scenarios in RBD and a reference counting
fixup to avoid use-after-free in CephFS, all marked for stable"
* tag 'ceph-for-6.4-rc6' of https://github.com/ceph/ceph-client:
ceph: fix use-after-free bug for inodes when flushing capsnaps
rbd: get snapshot context after exclusive lock is ensured to be held
rbd: move RBD_OBJ_FLAG_COPYUP_ENABLED flag setting
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/caps.c | 6 | ||||
| -rw-r--r-- | fs/ceph/snap.c | 4 |
2 files changed, 9 insertions, 1 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 789be30d6ee2..2321e5ddb664 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -1627,6 +1627,7 @@ void ceph_flush_snaps(struct ceph_inode_info *ci, struct inode *inode = &ci->netfs.inode; struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; struct ceph_mds_session *session = NULL; + bool need_put = false; int mds; dout("ceph_flush_snaps %p\n", inode); @@ -1671,8 +1672,13 @@ out: ceph_put_mds_session(session); /* we flushed them all; remove this inode from the queue */ spin_lock(&mdsc->snap_flush_lock); + if (!list_empty(&ci->i_snap_flush_item)) + need_put = true; list_del_init(&ci->i_snap_flush_item); spin_unlock(&mdsc->snap_flush_lock); + + if (need_put) + iput(inode); } /* diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 0b236ebd989f..2e73ba62bd7a 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -693,8 +693,10 @@ int __ceph_finish_cap_snap(struct ceph_inode_info *ci, capsnap->size); spin_lock(&mdsc->snap_flush_lock); - if (list_empty(&ci->i_snap_flush_item)) + if (list_empty(&ci->i_snap_flush_item)) { + ihold(inode); list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list); + } spin_unlock(&mdsc->snap_flush_lock); return 1; /* caller may want to ceph_flush_snaps */ } |