tree:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
head:   2f313e029020f1fa5f58f38f48ff6988d67fc3c1
commit: 1edb82d2021c7bae96509c03c4c5ef789f1e09a3 [53/61] nfsd: Use shash
config: s390-allyesconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 1edb82d2021c7bae96509c03c4c5ef789f1e09a3
        # save the attached .config to linux build tree
        make.cross ARCH=s390 

All warnings (new ones prefixed by >>):

   fs/nfsd/nfs4recover.c: In function 'nfs4_make_rec_clidname':

quoted

fs/nfsd/nfs4recover.c:147:1: warning: 'nfs4_make_rec_clidname' uses dynamic stack allocation

    }
    ^

vim +/nfs4_make_rec_clidname +147 fs/nfsd/nfs4recover.c

1edb82d2 Herbert Xu    2016-01-24  131  		status = crypto_shash_digest(desc, clname->data, clname->len,
1edb82d2 Herbert Xu    2016-01-24  132  					     cksum.data);
1edb82d2 Herbert Xu    2016-01-24  133  		shash_desc_zero(desc);
1edb82d2 Herbert Xu    2016-01-24  134  	}
a55370a3 NeilBrown     2005-06-23  135  
2216d449 Jeff Layton   2012-11-12  136  	if (status)
35058687 Herbert Xu    2006-08-24  137  		goto out;
a55370a3 NeilBrown     2005-06-23  138  
a55370a3 NeilBrown     2005-06-23  139  	md5_to_hex(dname, cksum.data);
a55370a3 NeilBrown     2005-06-23  140  
2216d449 Jeff Layton   2012-11-12  141  	status = 0;
a55370a3 NeilBrown     2005-06-23  142  out:
2bd9e7b6 Krishna Kumar 2008-10-20  143  	kfree(cksum.data);
1edb82d2 Herbert Xu    2016-01-24  144  	crypto_free_shash(tfm);
35058687 Herbert Xu    2006-08-24  145  out_no_tfm:
a55370a3 NeilBrown     2005-06-23  146  	return status;
a55370a3 NeilBrown     2005-06-23 @147  }
190e4fbf NeilBrown     2005-06-23  148  
2216d449 Jeff Layton   2012-11-12  149  /*
2216d449 Jeff Layton   2012-11-12  150   * If we had an error generating the recdir name for the legacy tracker
2216d449 Jeff Layton   2012-11-12  151   * then warn the admin. If the error doesn't appear to be transient,
2216d449 Jeff Layton   2012-11-12  152   * then disable recovery tracking.
2216d449 Jeff Layton   2012-11-12  153   */
2216d449 Jeff Layton   2012-11-12  154  static void
7255e716 Jeff Layton   2013-05-09  155  legacy_recdir_name_error(struct nfs4_client *clp, int error)

:::::: The code at line 147 was first introduced by commit
:::::: a55370a3c0106106a975c5a09cee800611d0cf50 [PATCH] knfsd: nfsd4: reboot hash

:::::: TO: NeilBrown [off-list ref]
:::::: CC: Linus Torvalds [off-list ref]

---
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