linux/security/integrity/evm
Xiu Jianfeng 51dd64bb99 Revert "evm: Fix memleak in init_desc"
This reverts commit ccf11dbaa0.

Commit ccf11dbaa0 ("evm: Fix memleak in init_desc") said there is
memleak in init_desc. That may be incorrect, as we can see, tmp_tfm is
saved in one of the two global variables hmac_tfm or evm_tfm[hash_algo],
then if init_desc is called next time, there is no need to alloc tfm
again, so in the error path of kmalloc desc or crypto_shash_init(desc),
It is not a problem without freeing tmp_tfm.

And also that commit did not reset the global variable to NULL after
freeing tmp_tfm and this makes *tfm a dangling pointer which may cause a
UAF issue.

Reported-by: Guozihua (Scott) <guozihua@huawei.com>
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
2022-06-15 14:03:47 -04:00
..
evm_crypto.c Revert "evm: Fix memleak in init_desc" 2022-06-15 14:03:47 -04:00
evm_main.c evm: Return INTEGRITY_PASS for enum integrity_status value '0' 2022-05-16 08:14:38 -04:00
evm_posix_acl.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
evm_secfs.c evm: Don't return an error in evm_write_xattrs() if audit is not enabled 2021-06-03 10:03:40 -04:00
evm.h evm: Clean up some variables 2022-05-16 08:14:38 -04:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00