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ceph: avoid accessing freeing inode in ceph_check_delayed_caps()

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Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2017-06-27 17:17:24 +08:00 committed by Ilya Dryomov
parent 62a65f36d0
commit 4b9f2042fd
1 changed files with 9 additions and 2 deletions
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11
fs/ceph/caps.c
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@ -3809,6 +3809,7 @@ bad:
*/
void ceph_check_delayed_caps(struct ceph_mds_client *mdsc)
{
struct inode *inode;
struct ceph_inode_info *ci;
int flags = CHECK_CAPS_NODELAY;
@ -3824,9 +3825,15 @@ void ceph_check_delayed_caps(struct ceph_mds_client *mdsc)
time_before(jiffies, ci->i_hold_caps_max))
break;
list_del_init(&ci->i_cap_delay_list);
inode = igrab(&ci->vfs_inode);
spin_unlock(&mdsc->cap_delay_lock);
dout("check_delayed_caps on %p\n", &ci->vfs_inode);
ceph_check_caps(ci, flags, NULL);
if (inode) {
dout("check_delayed_caps on %p\n", inode);
ceph_check_caps(ci, flags, NULL);
iput(inode);
}
}
spin_unlock(&mdsc->cap_delay_lock);
}