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nfsd-6.2 fixes:

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- Fix a filecache UAF during NFSD shutdown
 - Avoid exposing automounted mounts on NFS re-exports
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Merge tag 'nfsd-6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:

 - Fix a filecache UAF during NFSD shutdown

 - Avoid exposing automounted mounts on NFS re-exports

* tag 'nfsd-6.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  nfsd: fix handling of readdir in v4root vs. mount upcall timeout
  nfsd: shut down the NFSv4 state objects before the filecache
This commit is contained in:
Linus Torvalds 2023-01-04 11:26:36 -08:00
commit b61778fa51
2 changed files with 12 additions and 1 deletions
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11
fs/nfsd/nfs4xdr.c
View File

@ -3629,6 +3629,17 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
case nfserr_noent:
xdr_truncate_encode(xdr, start_offset);
goto skip_entry;
case nfserr_jukebox:
/*
* The pseudoroot should only display dentries that lead to
* exports. If we get EJUKEBOX here, then we can't tell whether
* this entry should be included. Just fail the whole READDIR
* with NFS4ERR_DELAY in that case, and hope that the situation
* will resolve itself by the client's next attempt.
*/
if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT)
goto fail;
fallthrough;
default:
/*
* If the client requested the RDATTR_ERROR attribute,

2
fs/nfsd/nfssvc.c
View File

@ -453,8 +453,8 @@ static void nfsd_shutdown_net(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nfsd_file_cache_shutdown_net(net);
nfs4_state_shutdown_net(net);
nfsd_file_cache_shutdown_net(net);
if (nn->lockd_up) {
lockd_down(net);
nn->lockd_up = false;