Re: [PATCH] pNFS: deadlock in pnfs_send_layoutreturn

Re: [PATCH] pNFS: deadlock in pnfs_send_layoutreturn

[kernel test robot]

Hi Ben,

kernel test robot noticed the following build errors:

[auto build test ERROR on trondmy-nfs/linux-next]
[also build test ERROR on linus/master v7.0-rc7 next-20260407]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ben-Roberts/pNFS-deadlock-in-pnfs_send_layoutreturn/20260408-135718
base:   git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next
patch link:    https://lore.kernel.org/r/20260407152035.4034628-1-ben.roberts%40gsacapital.com
patch subject: [PATCH] pNFS: deadlock in pnfs_send_layoutreturn
config: powerpc-motionpro_defconfig (https://download.01.org/0day-ci/archive/20260408/202604081929.yB1AglTU-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c80443cd37b2e2788cba67ffa180a6331e5f0791)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260408/202604081929.yB1AglTU-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604081929.yB1AglTU-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/nfs/pnfs.c:1364:35: error: expected ';' after expression
    1364 |                 pnfs_clear_layoutreturn_info(lo)
         |                                                 ^
         |                                                 ;
   1 error generated.


vim +1364 fs/nfs/pnfs.c

  1345	
  1346	static int
  1347	pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo,
  1348			       const nfs4_stateid *stateid,
  1349			       const struct cred **pcred,
  1350			       enum pnfs_iomode iomode,
  1351			       unsigned int flags)
  1352	{
  1353		struct inode *ino = lo->plh_inode;
  1354		struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld;
  1355		struct nfs4_layoutreturn *lrp;
  1356		const struct cred *cred = *pcred;
  1357		int status = 0;
  1358	
  1359		*pcred = NULL;
  1360		lrp = kzalloc_obj(*lrp, nfs_io_gfp_mask());
  1361		if (unlikely(lrp == NULL)) {
  1362			status = -ENOMEM;
  1363			spin_lock(&ino->i_lock);
> 1364			pnfs_clear_layoutreturn_info(lo)
  1365			pnfs_clear_layoutreturn_waitbit(lo);
  1366			spin_unlock(&ino->i_lock);
  1367			put_cred(cred);
  1368			pnfs_put_layout_hdr(lo);
  1369			goto out;
  1370		}
  1371	
  1372		pnfs_init_layoutreturn_args(&lrp->args, lo, stateid, iomode);
  1373		lrp->args.ld_private = &lrp->ld_private;
  1374		lrp->clp = NFS_SERVER(ino)->nfs_client;
  1375		lrp->cred = cred;
  1376		if (ld->prepare_layoutreturn)
  1377			ld->prepare_layoutreturn(&lrp->args);
  1378	
  1379		status = nfs4_proc_layoutreturn(lrp, flags);
  1380	out:
  1381		dprintk("<-- %s status: %d\n", __func__, status);
  1382		return status;
  1383	}
  1384	

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