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Madhuparna Bhowmik 1610cd913f evm: Fix RCU list related warnings 
[ Upstream commit 770f60586d ]

This patch fixes the following warning and few other instances of
traversal of evm_config_xattrnames list:

[   32.848432] =============================
[   32.848707] WARNING: suspicious RCU usage
[   32.848966] 5.7.0-rc1-00006-ga8d5875ce5f0b #1 Not tainted
[   32.849308] -----------------------------
[   32.849567] security/integrity/evm/evm_main.c:231 RCU-list traversed in non-reader section!!

Since entries are only added to the list and never deleted, use
list_for_each_entry_lockless() instead of list_for_each_entry_rcu for
traversing the list.  Also, add a relevant comment in evm_secfs.c to
indicate this fact.

Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org> (RCU viewpoint)
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-06-07 13:18:50 +02:00
..
evm evm: Fix RCU list related warnings 2020-06-07 13:18:50 +02:00
ima ima: Fix return value of ima_write_policy() 2020-05-27 17:46:08 +02:00
platform_certs efi: Only print errors about failing to get certs if EFI vars are found 2020-03-12 13:00:14 +01:00
Kconfig integrity: Select CONFIG_KEYS instead of depending on it 2019-08-05 18:40:20 -04:00
Makefile integrity: remove pointless subdir-$(CONFIG_...) 2019-10-05 15:29:49 +09:00
digsig.c ima: Implement support for module-style appended signatures 2019-08-05 18:40:23 -04:00
digsig_asymmetric.c Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs" 2019-07-10 18:43:43 -07:00
iint.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
integrity.h ima: Implement support for module-style appended signatures 2019-08-05 18:40:23 -04:00
integrity_audit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00