12:45 p.m.
BCC: lkp(a)intel.com
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Paulo Alcantara <pc(a)cjr.nz>
CC: Steve French <stfrench(a)microsoft.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 521a547ced6477c54b4b0cc206000406c221b4d6
commit: c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e cifs: support nested dfs links over
reconnect
date: 10 months ago
:::::: branch date: 6 hours ago
:::::: commit date: 10 months ago
config: csky-randconfig-m041-20220918
(https://download.01.org/0day-ci/archive/20220919/202209191006.aMlXMZTV-lk...)
compiler: csky-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp(a)intel.com>
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
New smatch warnings:
fs/cifs/dfs_cache.c:1382 __refresh_tcon() warn: passing a valid pointer to
'PTR_ERR'
Old smatch warnings:
arch/csky/include/asm/uaccess.h:202 __get_user_fn() error: uninitialized symbol
'retval'.
fs/cifs/dfs_cache.c:509 copy_ref_data() warn: passing a valid pointer to
'PTR_ERR'
vim +/PTR_ERR +1382 fs/cifs/dfs_cache.c
5072010ccf0592 Paulo Alcantara (SUSE 2019-03-19 1365)
b62366181a5e94 Paulo Alcantara 2021-07-16 1366 /* Refresh dfs referral of tcon
and mark it for reconnect if needed */
c88f7dcd6d6429 Paulo Alcantara 2021-11-03 1367 static int __refresh_tcon(const
char *path, struct cifs_ses **sessions, struct cifs_tcon *tcon,
c88f7dcd6d6429 Paulo Alcantara 2021-11-03 1368 bool force_refresh)
b62366181a5e94 Paulo Alcantara 2021-07-16 1369 {
b62366181a5e94 Paulo Alcantara 2021-07-16 1370 struct cifs_ses *ses;
1023e90b733acd Paulo Alcantara 2021-06-08 1371 struct cache_entry *ce;
1023e90b733acd Paulo Alcantara 2021-06-08 1372 struct dfs_info3_param *refs =
NULL;
1023e90b733acd Paulo Alcantara 2021-06-08 1373 int numrefs = 0;
1023e90b733acd Paulo Alcantara 2021-06-08 1374 bool needs_refresh = false;
b62366181a5e94 Paulo Alcantara 2021-07-16 1375 struct dfs_cache_tgt_list tl =
DFS_CACHE_TGT_LIST_INIT(tl);
c9f71103990591 Paulo Alcantara 2021-06-04 1376 int rc = 0;
b62366181a5e94 Paulo Alcantara 2021-07-16 1377 unsigned int xid;
1023e90b733acd Paulo Alcantara 2021-06-08 1378
c9f71103990591 Paulo Alcantara 2021-06-04 1379 ses =
find_ipc_from_server_path(sessions, path);
b62366181a5e94 Paulo Alcantara 2021-07-16 1380 if (IS_ERR(ses)) {
b62366181a5e94 Paulo Alcantara 2021-07-16 1381 cifs_dbg(FYI, "%s: could
not find ipc session\n", __func__);
b62366181a5e94 Paulo Alcantara 2021-07-16 @1382 return PTR_ERR(ses);
b62366181a5e94 Paulo Alcantara 2021-07-16 1383 }
1023e90b733acd Paulo Alcantara 2021-06-08 1384
1023e90b733acd Paulo Alcantara 2021-06-08 1385 down_read(&htable_rw_lock);
1023e90b733acd Paulo Alcantara 2021-06-08 1386 ce = lookup_cache_entry(path);
b62366181a5e94 Paulo Alcantara 2021-07-16 1387 needs_refresh = force_refresh ||
IS_ERR(ce) || cache_entry_expired(ce);
b62366181a5e94 Paulo Alcantara 2021-07-16 1388 if (!IS_ERR(ce)) {
b62366181a5e94 Paulo Alcantara 2021-07-16 1389 rc = get_targets(ce, &tl);
b62366181a5e94 Paulo Alcantara 2021-07-16 1390 if (rc)
b62366181a5e94 Paulo Alcantara 2021-07-16 1391 cifs_dbg(FYI, "%s: could
not get dfs targets: %d\n", __func__, rc);
b62366181a5e94 Paulo Alcantara 2021-07-16 1392 }
1023e90b733acd Paulo Alcantara 2021-06-08 1393 up_read(&htable_rw_lock);
1023e90b733acd Paulo Alcantara 2021-06-08 1394
b62366181a5e94 Paulo Alcantara 2021-07-16 1395 if (!needs_refresh) {
b62366181a5e94 Paulo Alcantara 2021-07-16 1396 rc = 0;
b62366181a5e94 Paulo Alcantara 2021-07-16 1397 goto out;
b62366181a5e94 Paulo Alcantara 2021-07-16 1398 }
1023e90b733acd Paulo Alcantara 2021-06-08 1399
c9f71103990591 Paulo Alcantara 2021-06-04 1400 xid = get_xid();
1023e90b733acd Paulo Alcantara 2021-06-08 1401 rc = get_dfs_referral(xid, ses,
path, &refs, &numrefs);
c9f71103990591 Paulo Alcantara 2021-06-04 1402 free_xid(xid);
1023e90b733acd Paulo Alcantara 2021-06-08 1403
1023e90b733acd Paulo Alcantara 2021-06-08 1404 /* Create or update a cache entry
with the new referral */
1023e90b733acd Paulo Alcantara 2021-06-08 1405 if (!rc) {
b62366181a5e94 Paulo Alcantara 2021-07-16 1406 dump_refs(refs, numrefs);
b62366181a5e94 Paulo Alcantara 2021-07-16 1407
1023e90b733acd Paulo Alcantara 2021-06-08 1408
down_write(&htable_rw_lock);
1023e90b733acd Paulo Alcantara 2021-06-08 1409 ce = lookup_cache_entry(path);
1023e90b733acd Paulo Alcantara 2021-06-08 1410 if (IS_ERR(ce))
1023e90b733acd Paulo Alcantara 2021-06-08 1411 add_cache_entry_locked(refs,
numrefs);
b62366181a5e94 Paulo Alcantara 2021-07-16 1412 else if (force_refresh ||
cache_entry_expired(ce))
1023e90b733acd Paulo Alcantara 2021-06-08 1413 update_cache_entry_locked(ce,
refs, numrefs);
1023e90b733acd Paulo Alcantara 2021-06-08 1414 up_write(&htable_rw_lock);
b62366181a5e94 Paulo Alcantara 2021-07-16 1415
b62366181a5e94 Paulo Alcantara 2021-07-16 1416
mark_for_reconnect_if_needed(tcon, &tl, refs, numrefs);
345c1a4a9e09dc Paulo Alcantara (SUSE 2019-12-04 1417) }
1023e90b733acd Paulo Alcantara 2021-06-08 1418
b62366181a5e94 Paulo Alcantara 2021-07-16 1419 out:
b62366181a5e94 Paulo Alcantara 2021-07-16 1420 dfs_cache_free_tgts(&tl);
1023e90b733acd Paulo Alcantara 2021-06-08 1421 free_dfs_info_array(refs,
numrefs);
b62366181a5e94 Paulo Alcantara 2021-07-16 1422 return rc;
b62366181a5e94 Paulo Alcantara 2021-07-16 1423 }
b62366181a5e94 Paulo Alcantara 2021-07-16 1424
:::::: The code at line 1382 was first introduced by commit
:::::: b62366181a5e9473e9c10e98f400049491c55876 cifs: support share failover when
remounting
:::::: TO: Paulo Alcantara <pc(a)cjr.nz>
:::::: CC: Steve French <stfrench(a)microsoft.com>
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