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authorDavid Howells <dhowells@redhat.com>2019-05-15 12:09:17 +0100
committerDavid Howells <dhowells@redhat.com>2019-05-15 12:32:34 +0100
commita1b879eefc2b34cd3f17187ef6fc1cf3960e9518 (patch)
tree749a872254c15ad9de5a0e17a895d7d553321e99 /fs/afs
parent80f232121b69cc69a31ccb2b38c1665d770b0710 (diff)
downloadlinux-a1b879eefc2b34cd3f17187ef6fc1cf3960e9518.tar.bz2
afs: Fix key leak in afs_release() and afs_evict_inode()
Fix afs_release() to go through the cleanup part of the function if FMODE_WRITE is set rather than exiting through vfs_fsync() (which skips the cleanup). The cleanup involves discarding the refs on the key used for file ops and the writeback key record. Also fix afs_evict_inode() to clean up any left over wb keys attached to the inode/vnode when it is removed. Fixes: 5a8132761609 ("afs: Do better accretion of small writes on newly created content") Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs')
-rw-r--r--fs/afs/file.c7
-rw-r--r--fs/afs/inode.c1
2 files changed, 5 insertions, 3 deletions
diff --git a/fs/afs/file.c b/fs/afs/file.c
index e8d6619890a9..b0a43e250a9b 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -170,11 +170,12 @@ int afs_release(struct inode *inode, struct file *file)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
struct afs_file *af = file->private_data;
+ int ret = 0;
_enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
if ((file->f_mode & FMODE_WRITE))
- return vfs_fsync(file, 0);
+ ret = vfs_fsync(file, 0);
file->private_data = NULL;
if (af->wb)
@@ -182,8 +183,8 @@ int afs_release(struct inode *inode, struct file *file)
key_put(af->key);
kfree(af);
afs_prune_wb_keys(vnode);
- _leave(" = 0");
- return 0;
+ _leave(" = %d", ret);
+ return ret;
}
/*
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index c4652b42d545..f30aa5eacd39 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -573,6 +573,7 @@ void afs_evict_inode(struct inode *inode)
}
#endif
+ afs_prune_wb_keys(vnode);
afs_put_permits(rcu_access_pointer(vnode->permit_cache));
key_put(vnode->silly_key);
vnode->silly_key = NULL;