diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-29 14:41:09 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-29 14:41:09 -0700 |
commit | 7376e39ad96583545faefa2e7798bcb6a2a212a7 (patch) | |
tree | 09842932712f06a21a7f1bdd83fa6fbfabc79d70 | |
parent | c6503f12d135a616b25be99a492765fc9e9fe07e (diff) | |
parent | daf5cc27eed99afdea8d96e71b89ba41f5406ef6 (diff) | |
download | linux-stable-7376e39ad96583545faefa2e7798bcb6a2a212a7.tar.gz linux-stable-7376e39ad96583545faefa2e7798bcb6a2a212a7.tar.bz2 linux-stable-7376e39ad96583545faefa2e7798bcb6a2a212a7.zip |
Merge tag 'ceph-for-5.1-rc3' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"A patch to avoid choking on multipage bvecs in the messenger and a
small use-after-free fix"
* tag 'ceph-for-5.1-rc3' of git://github.com/ceph/ceph-client:
ceph: fix use-after-free on symlink traversal
libceph: fix breakage caused by multipage bvecs
-rw-r--r-- | fs/ceph/inode.c | 2 | ||||
-rw-r--r-- | net/ceph/messenger.c | 8 |
2 files changed, 7 insertions, 3 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index e3346628efe2..2d61ddda9bf5 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -524,6 +524,7 @@ static void ceph_i_callback(struct rcu_head *head) struct inode *inode = container_of(head, struct inode, i_rcu); struct ceph_inode_info *ci = ceph_inode(inode); + kfree(ci->i_symlink); kmem_cache_free(ceph_inode_cachep, ci); } @@ -566,7 +567,6 @@ void ceph_destroy_inode(struct inode *inode) } } - kfree(ci->i_symlink); while ((n = rb_first(&ci->i_fragtree)) != NULL) { frag = rb_entry(n, struct ceph_inode_frag, node); rb_erase(n, &ci->i_fragtree); diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 7e71b0df1fbc..3083988ce729 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -840,6 +840,7 @@ static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, size_t bytes) { struct ceph_bio_iter *it = &cursor->bio_iter; + struct page *page = bio_iter_page(it->bio, it->iter); BUG_ON(bytes > cursor->resid); BUG_ON(bytes > bio_iter_len(it->bio, it->iter)); @@ -851,7 +852,8 @@ static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, return false; /* no more data */ } - if (!bytes || (it->iter.bi_size && it->iter.bi_bvec_done)) + if (!bytes || (it->iter.bi_size && it->iter.bi_bvec_done && + page == bio_iter_page(it->bio, it->iter))) return false; /* more bytes to process in this segment */ if (!it->iter.bi_size) { @@ -899,6 +901,7 @@ static bool ceph_msg_data_bvecs_advance(struct ceph_msg_data_cursor *cursor, size_t bytes) { struct bio_vec *bvecs = cursor->data->bvec_pos.bvecs; + struct page *page = bvec_iter_page(bvecs, cursor->bvec_iter); BUG_ON(bytes > cursor->resid); BUG_ON(bytes > bvec_iter_len(bvecs, cursor->bvec_iter)); @@ -910,7 +913,8 @@ static bool ceph_msg_data_bvecs_advance(struct ceph_msg_data_cursor *cursor, return false; /* no more data */ } - if (!bytes || cursor->bvec_iter.bi_bvec_done) + if (!bytes || (cursor->bvec_iter.bi_bvec_done && + page == bvec_iter_page(bvecs, cursor->bvec_iter))) return false; /* more bytes to process in this segment */ BUG_ON(cursor->last_piece); |