1:17 a.m.
tree: git://git.samba.org/sfrench/cifs-2.6.git for-next
head: 40dad7597b6bdbadb33434f1a667c43d6869a66d
commit: f3ce4fce27131ebec2c123ee6c2a4aee477f4b38 [8/9] smb3: add minor debug statement
config: x86_64-randconfig-r006-20210715 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
0e49c54a8cbd3e779e5526a5888c683c01cc3c50)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
git remote add cifs git://git.samba.org/sfrench/cifs-2.6.git
git fetch --no-tags cifs for-next
git checkout f3ce4fce27131ebec2c123ee6c2a4aee477f4b38
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
> fs/cifs/smb2transport.c:419:15: warning: variable
'chan_index' is uninitialized when used here [-Wuninitialized]
__func__, chan_index);
^~~~~~~~~~
fs/cifs/cifs_debug.h:79:43: note: expanded from macro 'cifs_dbg'
cifs_dbg_func(ratelimited, type, fmt, ##__VA_ARGS__); \
^~~~~~~~~~~
fs/cifs/cifs_debug.h:66:23: note: expanded from macro 'cifs_dbg_func'
__FILE__, ##__VA_ARGS__); \
^~~~~~~~~~~
include/linux/printk.h:584:50: note: expanded from macro
'pr_debug_ratelimited'
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
^~~~~~~~~~~
fs/cifs/smb2transport.c:401:25: note: initialize the variable 'chan_index' to
silence this warning
unsigned int chan_index;
^
= 0
1 warning generated.
vim +/chan_index +419 fs/cifs/smb2transport.c
392
393 static int
394 generate_smb3signingkey(struct cifs_ses *ses,
395 const struct derivation_triplet *ptriplet)
396 {
397 int rc;
398 #ifdef CONFIG_CIFS_DEBUG_DUMP_KEYS
399 struct TCP_Server_Info *server = ses->server;
400 #endif
401 unsigned int chan_index;
402
403 /*
404 * All channels use the same encryption/decryption keys but
405 * they have their own signing key.
406 *
407 * When we generate the keys, check if it is for a new channel
408 * (binding) in which case we only need to generate a signing
409 * key and store it in the channel as to not overwrite the
410 * master connection signing key stored in the session
411 */
412
413 if (ses->binding) {
414 rc = generate_key(ses, ptriplet->signing.label,
415 ptriplet->signing.context,
416 cifs_ses_binding_channel(ses)->signkey,
417 SMB3_SIGN_KEY_SIZE);
418 cifs_dbg(FYI, "%s: Generated key for chan %u\n",
419 __func__, chan_index);
420 if (rc)
421 return rc;
422 } else {
423 rc = generate_key(ses, ptriplet->signing.label,
424 ptriplet->signing.context,
425 ses->smb3signingkey,
426 SMB3_SIGN_KEY_SIZE);
427 if (rc)
428 return rc;
429
430 memcpy(ses->chans[0].signkey, ses->smb3signingkey,
431 SMB3_SIGN_KEY_SIZE);
432
433 rc = generate_key(ses, ptriplet->encryption.label,
434 ptriplet->encryption.context,
435 ses->smb3encryptionkey,
436 SMB3_ENC_DEC_KEY_SIZE);
437 rc = generate_key(ses, ptriplet->decryption.label,
438 ptriplet->decryption.context,
439 ses->smb3decryptionkey,
440 SMB3_ENC_DEC_KEY_SIZE);
441 if (rc)
442 return rc;
443 }
444
445 if (rc)
446 return rc;
447
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org