diff options
| author | Scott Mayhew <smayhew@redhat.com> | 2025-08-07 12:49:38 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-19 16:35:43 +0200 |
| commit | 57c1bb02b4fc8eec6eb01736e7fad26dffacf18c (patch) | |
| tree | f7fe68c08e3371286f9e1a20ae6706e58092f6f5 | |
| parent | a707c9a8380f1f4da0ee907a7ff9eaa976df29b1 (diff) | |
nfs/localio: restore creds before releasing pageio data
[ Upstream commit 992203a1fba51b025c60ec0c8b0d9223343dea95 ]
Otherwise if the nfsd filecache code releases the nfsd_file
immediately, it can trigger the BUG_ON(cred == current->cred) in
__put_cred() when it puts the nfsd_file->nf_file->f-cred.
Fixes: b9f5dd57f4a5 ("nfs/localio: use dedicated workqueues for filesystem read and write")
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20250807164938.2395136-1-smayhew@redhat.com
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/nfs/localio.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/nfs/localio.c b/fs/nfs/localio.c index 8fb145124e93..82a053304ad5 100644 --- a/fs/nfs/localio.c +++ b/fs/nfs/localio.c @@ -425,12 +425,13 @@ static void nfs_local_call_read(struct work_struct *work) nfs_local_iter_init(&iter, iocb, READ); status = filp->f_op->read_iter(&iocb->kiocb, &iter); + + revert_creds(save_cred); + if (status != -EIOCBQUEUED) { nfs_local_read_done(iocb, status); nfs_local_pgio_release(iocb); } - - revert_creds(save_cred); } static int @@ -626,14 +627,15 @@ static void nfs_local_call_write(struct work_struct *work) file_start_write(filp); status = filp->f_op->write_iter(&iocb->kiocb, &iter); file_end_write(filp); + + revert_creds(save_cred); + current->flags = old_flags; + if (status != -EIOCBQUEUED) { nfs_local_write_done(iocb, status); nfs_local_vfs_getattr(iocb); nfs_local_pgio_release(iocb); } - - revert_creds(save_cred); - current->flags = old_flags; } static int |