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Mimi Zohar 867c202654 ima: fix add LSM rule bug ... If security_filter_rule_init() doesn't return a rule, then not everything is as fine as the return code implies. This bug only occurs when the LSM (eg. SELinux) is disabled at runtime. Adding an empty LSM rule causes ima_match_rules() to always succeed, ignoring any remaining rules. default IMA TCB policy: # PROC_SUPER_MAGIC dont_measure fsmagic=0x9fa0 # SYSFS_MAGIC dont_measure fsmagic=0x62656572 # DEBUGFS_MAGIC dont_measure fsmagic=0x64626720 # TMPFS_MAGIC dont_measure fsmagic=0x01021994 # SECURITYFS_MAGIC dont_measure fsmagic=0x73636673 < LSM specific rule > dont_measure obj_type=var_log_t measure func=BPRM_CHECK measure func=FILE_MMAP mask=MAY_EXEC measure func=FILE_CHECK mask=MAY_READ uid=0 Thus without the patch, with the boot parameters 'tcb selinux=0', adding the above 'dont_measure obj_type=var_log_t' rule to the default IMA TCB measurement policy, would result in nothing being measured. The patch prevents the default TCB policy from being replaced. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Cc: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Cc: David Safford <safford@watson.ibm.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		14 years ago
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Kconfig	ima: remove ACPI dependency	15 years ago
Makefile	integrity: IMA display	16 years ago
ima.h	IMA: drop refcnt from ima_iint_cache since it isn't needed	14 years ago
ima_api.c	IMA: move read counter into struct inode	14 years ago
ima_audit.c	Merge branch 'master' into next	15 years ago
ima_crypto.c	Merge branch 'master' into next	15 years ago
ima_fs.c	ima: use generic_file_llseek for securityfs	15 years ago
ima_iint.c	IMA: explicit IMA i_flag to remove global lock on inode_delete	14 years ago
ima_init.c	Merge branch 'master' into next	15 years ago
ima_main.c	IMA: fix the ToMToU logic	14 years ago
ima_policy.c	ima: fix add LSM rule bug	14 years ago
ima_queue.c	Merge branch 'master' into next	15 years ago