forked from Minki/linux
SUNRPC: Fix validity issues with rpc_pipefs sb->s_fs_info
rpc_kill_sb() must defer calling put_net() until after the notifier has been called, since most (all?) of the notifier callbacks assume that sb->s_fs_info points to a valid net namespace. It also must not call put_net() if the call to rpc_fill_super was unsuccessful. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=48421 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com> Cc: stable@vger.kernel.org [>= v3.4]
This commit is contained in:
parent
0e4a43ed08
commit
642fe4d00d
@ -1152,14 +1152,19 @@ static void rpc_kill_sb(struct super_block *sb)
|
||||
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
|
||||
|
||||
mutex_lock(&sn->pipefs_sb_lock);
|
||||
if (sn->pipefs_sb != sb) {
|
||||
mutex_unlock(&sn->pipefs_sb_lock);
|
||||
goto out;
|
||||
}
|
||||
sn->pipefs_sb = NULL;
|
||||
mutex_unlock(&sn->pipefs_sb_lock);
|
||||
put_net(net);
|
||||
dprintk("RPC: sending pipefs UMOUNT notification for net %p%s\n",
|
||||
net, NET_NAME(net));
|
||||
blocking_notifier_call_chain(&rpc_pipefs_notifier_list,
|
||||
RPC_PIPEFS_UMOUNT,
|
||||
sb);
|
||||
put_net(net);
|
||||
out:
|
||||
kill_litter_super(sb);
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user