diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-26 11:18:30 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-26 11:18:30 -0700 |
commit | 97d8cc20085f63cfbf0b123295e12cf9ad66a03c (patch) | |
tree | 941cd6fdcfb95da0d11ba83262bd248bde6fe9b1 | |
parent | 9b49ceb8545b8eca68c03388a07ecca7caa5d9c1 (diff) | |
parent | a9e6ffbc5b7324b6639ee89028908b1e91ceed51 (diff) |
Merge tag 'ceph-for-5.14-rc8' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"Two memory management fixes for the filesystem"
* tag 'ceph-for-5.14-rc8' of git://github.com/ceph/ceph-client:
ceph: fix possible null-pointer dereference in ceph_mdsmap_decode()
ceph: correctly handle releasing an embedded cap flush
-rw-r--r-- | fs/ceph/caps.c | 21 | ||||
-rw-r--r-- | fs/ceph/mds_client.c | 7 | ||||
-rw-r--r-- | fs/ceph/mdsmap.c | 8 | ||||
-rw-r--r-- | fs/ceph/snap.c | 3 | ||||
-rw-r--r-- | fs/ceph/super.h | 3 |
5 files changed, 27 insertions, 15 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 2a2900903f8c..39db97f149b9 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -1743,7 +1743,11 @@ int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask, struct ceph_cap_flush *ceph_alloc_cap_flush(void) { - return kmem_cache_alloc(ceph_cap_flush_cachep, GFP_KERNEL); + struct ceph_cap_flush *cf; + + cf = kmem_cache_alloc(ceph_cap_flush_cachep, GFP_KERNEL); + cf->is_capsnap = false; + return cf; } void ceph_free_cap_flush(struct ceph_cap_flush *cf) @@ -1778,7 +1782,7 @@ static bool __detach_cap_flush_from_mdsc(struct ceph_mds_client *mdsc, prev->wake = true; wake = false; } - list_del(&cf->g_list); + list_del_init(&cf->g_list); return wake; } @@ -1793,7 +1797,7 @@ static bool __detach_cap_flush_from_ci(struct ceph_inode_info *ci, prev->wake = true; wake = false; } - list_del(&cf->i_list); + list_del_init(&cf->i_list); return wake; } @@ -2352,7 +2356,7 @@ static void __kick_flushing_caps(struct ceph_mds_client *mdsc, ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH; list_for_each_entry_reverse(cf, &ci->i_cap_flush_list, i_list) { - if (!cf->caps) { + if (cf->is_capsnap) { last_snap_flush = cf->tid; break; } @@ -2371,7 +2375,7 @@ static void __kick_flushing_caps(struct ceph_mds_client *mdsc, first_tid = cf->tid + 1; - if (cf->caps) { + if (!cf->is_capsnap) { struct cap_msg_args arg; dout("kick_flushing_caps %p cap %p tid %llu %s\n", @@ -3516,7 +3520,7 @@ static void handle_cap_flush_ack(struct inode *inode, u64 flush_tid, cleaned = cf->caps; /* Is this a capsnap? */ - if (cf->caps == 0) + if (cf->is_capsnap) continue; if (cf->tid <= flush_tid) { @@ -3589,8 +3593,9 @@ out: while (!list_empty(&to_remove)) { cf = list_first_entry(&to_remove, struct ceph_cap_flush, i_list); - list_del(&cf->i_list); - ceph_free_cap_flush(cf); + list_del_init(&cf->i_list); + if (!cf->is_capsnap) + ceph_free_cap_flush(cf); } if (wake_ci) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index afdc20213876..0b69aec23e5c 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1616,7 +1616,7 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap, spin_lock(&mdsc->cap_dirty_lock); list_for_each_entry(cf, &to_remove, i_list) - list_del(&cf->g_list); + list_del_init(&cf->g_list); if (!list_empty(&ci->i_dirty_item)) { pr_warn_ratelimited( @@ -1668,8 +1668,9 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap, struct ceph_cap_flush *cf; cf = list_first_entry(&to_remove, struct ceph_cap_flush, i_list); - list_del(&cf->i_list); - ceph_free_cap_flush(cf); + list_del_init(&cf->i_list); + if (!cf->is_capsnap) + ceph_free_cap_flush(cf); } wake_up_all(&ci->i_cap_wq); diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c index abd9af7727ad..3c444b9cb17b 100644 --- a/fs/ceph/mdsmap.c +++ b/fs/ceph/mdsmap.c @@ -394,9 +394,11 @@ void ceph_mdsmap_destroy(struct ceph_mdsmap *m) { int i; - for (i = 0; i < m->possible_max_rank; i++) - kfree(m->m_info[i].export_targets); - kfree(m->m_info); + if (m->m_info) { + for (i = 0; i < m->possible_max_rank; i++) + kfree(m->m_info[i].export_targets); + kfree(m->m_info); + } kfree(m->m_data_pg_pools); kfree(m); } diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 4c6bd1042c94..15105f9da3fd 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -487,6 +487,9 @@ static void ceph_queue_cap_snap(struct ceph_inode_info *ci) pr_err("ENOMEM allocating ceph_cap_snap on %p\n", inode); return; } + capsnap->cap_flush.is_capsnap = true; + INIT_LIST_HEAD(&capsnap->cap_flush.i_list); + INIT_LIST_HEAD(&capsnap->cap_flush.g_list); spin_lock(&ci->i_ceph_lock); used = __ceph_caps_used(ci); diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 9215a2f4535c..b1a363641beb 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -182,8 +182,9 @@ struct ceph_cap { struct ceph_cap_flush { u64 tid; - int caps; /* 0 means capsnap */ + int caps; bool wake; /* wake up flush waiters when finish ? */ + bool is_capsnap; /* true means capsnap */ struct list_head g_list; // global struct list_head i_list; // per inode }; |