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authorJeff Layton <jlayton@kernel.org>2020-04-08 08:41:38 -0400
committerIlya Dryomov <idryomov@gmail.com>2020-04-13 19:33:47 +0200
commit2a575f138d003fff0f4930b5cfae4a1c46343b8f (patch)
tree81df5b30d09f3b0360216ef0842dc0e26c7c77f7 /fs/ceph/file.c
parent8ae0299a4b72f2f9ad2b755da91c6a2beabaee62 (diff)
ceph: fix potential bad pointer deref in async dirops cb's
The new async dirops callback routines can pass ERR_PTR values to ceph_mdsc_free_path, which could cause an oops. Make ceph_mdsc_free_path ignore ERR_PTR values. Also, ensure that the pr_warn messages look sane even if ceph_mdsc_build_path fails. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/file.c')
-rw-r--r--fs/ceph/file.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4a5ccbb7e808..afdfca965a7f 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -527,8 +527,8 @@ static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
if (result) {
struct dentry *dentry = req->r_dentry;
- int pathlen;
- u64 base;
+ int pathlen = 0;
+ u64 base = 0;
char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
&base, 0);